Air Moving Solutions. CENTRIFUGAL INDUCED FLOW FUME EXHAUST fans. Model BAIFE Model BCIFE - AMCA 260 TESTED

Air Moving Solutions. CENTRIFUGAL INDUCED FLOW FUME EXHAUST fans Model BAIFE Model BCIFE - AMCA 260 TESTED CATALOG 390 April 2012

CentrifugalFans Models BAIFE BCIFE AMCA 260 Tested Twin City Fan & Blower offers specially modified versions of the BAF-SW and BC-SW fans designated as BAIFE and BCIFE, respectively for induced flow laboratory fume hood exhaust applications. The BAIFE and BCIFE fans consist of a single-wide centrifugal unit, a choice of one of four different nozzles and a specially designed windband to maximize dilution ratio (overall outlet volume/lab outlet volume) and plume height. Available in five (5) arrangements, both belt and direct drive, the BAIFE and BCIFE are capable of generating an induced flow to meet stringent roof exhaust requirements. BAIFE/BCIFE Application The BAIFE and BCIFE Induced Flow Exhaust Fans are intended for use in exhausting laboratory fumes and hazardous chemicals in such a manner that diminishes the likelihood of concentrated, contaminantladen air from being re-entrained into the building's intake or makeup air. This unit is commonly used in exhaust systems for universities, schools, hospitals, research facilities, laboratories, restaurants and waste water treatment plants. Induced flow exhaust fans dilute contaminated air at the outlet as well as increase the outlet volume of the fan. This accelerates the discharge air, increasing plume height without a tall stack. Sizes 12.25" to 66.0" wheel diameters Performance Airflow to 129,000 Static pressure to 15" w.g. Model BAIFE & BCIFE is available with UL/CUL 705 listing, for electrical, File No. E158680. Twin City Fan & Blower certifies that the BAIFE Centrifugal Induced Flow Exhaust Fan herein are licensed to bear the AMCA Seal. The ratings shown are based on test and procedures performance in accordance with AMCA Publication 211 and 311 and comply with the requirements of the AMCA Certified Ratings Program. The AMCA Certified Ratings Seal applies to Induced Flow Fan Air and Sound Performance tested in accordance with AMCA standard 260. See Twin City Fan & Blower Fan Selector program for sound ratings. Drive Configurations Belt Driven: Arrangements 1, 9 and 10 Direct Drive: Arrangements 4 and 8 Construction Class I, II, & III 2 Twin City Fan Catalog 390

Models BAIFE BCIFE Centrifugal Induced Flow Exhaust Fans Wheel Designs BAIFE airfoil wheels are available in sizes 122 through 165 in aluminum construction only using extruded aluminum blades. Sizes 165 and larger are constructed of steel using die-formed hollow airfoil blades, both sides of the blades continuously welded to the conical spun inlet shroud (rim) and the backplate. BCIFE wheels are constructed of steel using flat single thickness blades, solid welded to the rim and backplate. Flat blades lend themselves well to high temperature environments or where high humidity or light dust loading may be present. The use of a conical spun shroud (rim) makes BAIFE/ BCIFE fans less susceptible to the performance losses associated with poor inlet conditions. Both wheels are designed for a stable air performance throughout the operating range. The impellers are statically and dynamically balanced to grade BV-3 per AMCA 204 for smooth operation prior to being assembled in the fan, followed by final balance of the entire rotating assembly by Twin City Fan & Blower. Modular Mixing Plenum Box ExplodedView Windband Centrifugal Wheel Flex Connector Standard Product Features Backward inclined, airfoil designs and single thickness designs Wheel diameters from 12.25" through 66" Arrangements 1, 4, 8, 9 and 10 available Four (4) discharge nozzles available per fan size (low, medium, high and extra high velocity) Three (3) discrete wheel widths available (100%, 70%, 50%) Standard maximum operating temperature of 300 F (except Arr. 4) Bolted access door Housing drain 125 mph wind load capability Weather Hood Bypass Damper Isolation Damper Fan Housing Motor Optional Features Modular mixing plenum box Bypass damper Isolation damper AMCA B or C spark resistant construction High temperature package to 500 F (BCIFE Only) Higher temperatures available consult factory for application Special coatings Special materials of construction Acoustic windband Vibration isolation (under fan only) Roof curb (for modular mixing plenum box) BAIFE Wheel BCIFE Wheel 2012 Twin City Fan Companies, Ltd. All rights reserved throughout the world. Catalog illustrations cover the general appearance of Twin City Fan & Blower products at the time of publication and we reserve the right to make changes in design and construction at any time without notice. www.tcf.com 3

FumeExhaustDefinitions QT Bypass Air Ambient air that is drawn through the bypass air plenum and mixed with the lab exhaust to increase dilution and plume rise. Bypass air is primarily used in variable volume applications to maintain a constant discharge volume but can also be used to increase overall exhaust volume and dilution. (See diagram to left.) QF QE QE Dilution Ratio The ratio of the total fan outlet volume to the lab exhaust volume. (Total Volume/Lab Exhaust Volume). Value includes any additional bypass air in the calculation. (See diagram to left.) Entrainment Air Air that is entrained (induced flow) through the windband and fan housing, mixed with the laboratory exhaust to increase the dilution ratio and plume rise. (See diagram to left.) Entrainment Ratio The ratio of the total fan outlet volume to the fan inlet volume. (Total Volume/Fan Inlet Volume - see diagram to left.) QB QB = Bypass Flow QE = Entrained Flow QF = Fan Flow QL = Laboratory Flow (Contaminated Air) QT = Total Flow QT = QE + QF QF = QB + QL QL QT = QE + QB + QL Dilution Ratio = D.R. = QT QL Nozzle Device located internal to the fan housing, providing fume exhaust air to accelerate upon entrance to the windband. Several nozzles per fan size are available on the BAIFE and BCIFE; low-velocity, medium-velocity, high-velocity and extra-high-velocity. Each nozzle provides different flow characteristics. Nozzle should be selected based on the application requirements. Plume Rise The height of the fume exhaust and entrainment air above the discharge of the windband. (See page 5 for diagram and calculations.) Plume Height Overall height of the discharge plume rise, plus the added height of the exhaust system above the roofdeck level. (See page 5 for diagram and calculations.) Total Airflow The total airflow exiting the windband, including fume exhaust, bypass air, and entrainment air. (See diagram to left.) Entrainment Ratio = E.R. = QT QF Windband Device used to direct the fume exhaust as it leaves the housing of the exhaust fan and entrain dilution air. 4 Twin City Fan Catalog 390

AMCA260Testing The following illustrations describe the procedure for determining the total laboratory exhaust fan discharge flow. The total discharge flow is the sum of inlet airflow and entrained airflow. The key requirement to AMCA 260 is the variable resistance box. This box allows the measurement of total discharge flow (Ps = 0 in. w.g. to simulate discharging the fan to atmosphere) at all points along its fan curve. Without the variable resistance box, the entrained airflow can only be measured at the free air point of its fan curve. The entrained airflow obtained can be used to calculate an effective plume height. Therefore, AMCA 260 certification is necessary to ensure the laboratory exhaust fan specified is providing the plume rise and entrainment submitted. AIR TEST CHAMBER AMCA 260 Figure 1 AMCA 260 Figure 15 Total Airflow Total Airflow AIR TEST CHAMBER Induced Flow Air Induced Flow Air Inlet Airflow Variable Resistance Box Induced Flow Air Induced Flow Air Inlet Airflow PlumeHeightCalculation he = hr + hs* he = [3.0 x (V x d/u)] + hs he = Effective plume height (ft) hr = Plume rise (ft) hs = Stack height (height from roof to outlet of windband) (ft) V = Windband exit velocity (ft/min) d = Windband outlet diameter (ft) U = Crosswind speed (ft/min) h r h e * Equation taken from ASHRAE Laboratory Design Guide, Equation 9-2. Note: Plume height calculations are typically calculated with a 10 mph (880 ft/min) crosswind. h s www.tcf.com 5

ConstructionFeatures Nozzle Located between the fan housing and the windband, the nozzle efficiently increases the speed of the exhaust stream into the windband. The accelerated air entrains surrounding ambient air into the windband diluting the building exhaust. Windband Windbands designed to maximize plume height and entrainment air. Constructed of heavy-gauge steel for strength and rigidity, the windband is mounted directly to the fan housing. Bolted Access Door Housing All fan housings are continuously welded to provide strength and durability for extended service life a necessity in all commercial and industrial installations. The structural frame of the housing is designed to support the windband and nozzle at cross wind speeds up to 125mph without the use of guy-wires for rigid mounted fans. Windband and Nozzle Shaft Seal Drain Lifting lugs are standard on all fans. Precisely positioned cutoff plates and aerodynamically spun inlet cones provide high efficiency and smooth airflow through the fan. Bolted Access Door Wheel area access door for inspection or cleaning of the wheel. Drain A drain coupling welded to the lowest point of the housing allows drainage of condensate from fan housing. Bearings Bearings are heavy duty, grease lubricated, spherical roller or adapter mounted anti-friction ball, self-aligning, pillow block type, selected for minimum average bearing life (AFBMA L-10) in excess of 200,000 hours at the maximum fan RPM. Shaft Shafts are AISI Grade 1040 or 1045 hot-rolled steel accurately turned, ground, polished, and ring gauged for accuracy. Shafts are generously sized for a first critical speed of at least 1.43 times the maximum speed for the class. Shaft Seal The standard shaft seal reduces leakage and protects the bearings from a contaminated airstream. It is constructed of non-asbestos woven fibrous materials (ceramic felt) compressed between an aluminum cover plate and the fan housing. A ceramic felt shaft seal does not make the fan gas tight. A variety of special seals is available for low leakage applications requiring more positive protection, including mechanical type stuffing boxes 6 Twin City Fan Catalog 390

Mixing Plenum Box The mixing plenum box features modular construction allowing for multiple configurations and effortless retrofitting. Bottom intake is standard, side intake option available upon request. ProductAccessories Isolation Damper Standard isolation dampers, constructed of heavy duty galvanized steel as standard, are typically used on multi-fan mixing plenum boxes to isolate individual fans. Available in extruded aluminum construction upon request. Bypass Damper Used to maintain outlet velocities by allowing a constant volume at the fan discharge when exhaust air is reduced. Constructed of heavy duty galvanized steel as standard, extended aluminum available upon request. Roof Curb Standard roof curbs are constructed of heavy duty galvanized steel and include 1-1/2 thick insulation. Roof Curb Isolation Damper Vortex Breaker Installed in the mixing plenum box at the fan inlet, the vortex breaker minimizes air swirl. Recommended for multi-fan configurations and intakes that are not directly across from the inlet of the fan. Disconnect Switches A NEMA 1, 3R, 4 or 7/9 safety disconnect switch is available for positive electrical shutoff of the fan and the protection of service personnel. Disconnects are available shipped loose for field mounting and wiring or factory mounted and wired, excluding NEMA 7/9 disconnects. V-Belt Drive V-belt drives offer an economical yet flexible means of transmitting power to the fans. Belt Guards A belt guard protects personnel from the moving drive parts. Both standard and totally enclosed type guards are available. Shaft and Bearing Guards Solid sheet metal guards cover shaft and bearings and come with extended lube lines to a common point out either side of the guard. A guard spanning the shaft between the bearings is also available to provide easy access to bearings for lubrication and vibration monitoring. Spark Resistant Construction Various grades of spark resistance are available as defined by AMCA. Bypass Damper Disconnect Switch Piezometer Ring (Airflow Measuring System) A piezometer ring is available as part of an airflow measuring system, based on the principle of a flow nozzle. The flow can be calculated by measuring the pressure drop through the inlet cone. No tubes or sensors are inserted in the high velocity airstream which could obstruct airflow. A differential pressure transducer and digital display can also be provided. Piezometer Ring Mounted at Throat of Inlet Cone Based on Twin City Fan laboratory tests, the system was determined to be accurate within +/-5%. For more information, refer to Twin City Fan Engineering Supplement ES-105. High Temperature Modifications (BCIFE Only) Standard fan design temperature is 300 F (150 F for Arrangement 4). High temperature modifications allow the BCIFE to handle airstream temperatures to 500 F. Modifications include one or more of the following items depending on operating temperature: shaft seal, high temperature grease, one (1) expansion bearing shaft cooler, heat shield (Arr. 9 and 10), high temperature aluminum paint. Consult Twin City Fan for more information and restrictions with high temperature fan applications and material derating factors. www.tcf.com 7

MountingConfigurations Single Unit Dual-Tandem 2x1 Dual Unit 3x1 Triple Unit 4x1 Quad Unit 2x2 Quad Unit Unique applications require unique configurations. With the Twin City Fan & Blower modular mixing box, multiple configurations are able to be easily created and retrofitted. 8 Twin City Fan Catalog 390

Table 1. BAIFE Maximum RPM, Wheel Weights, and WR 2 (moment of inertia in lb-ft 2 ) CLASS I CLASS II CLASS III MAX. WEIGHT WR 2 MAX. WEIGHT WR 2 MAX. WEIGHT WR 2 SIZE RPM LB. LB-FT 2 RPM LB. LB-FT 2 RPM LB. LB-FT 2 122 3990 9 0.97 5205 9 0.97 135 3265 10 1.4 4259 10 1.4 150 3260 14 2.12 4252 14 2.12 165 2673 16 3.23 3487 17 4.04 182 2294 34 9.75 2902 39 10.8 3701 54 14.2 200 2093 41 13.9 2648 45 15.3 3377 64 20.2 222 1881 69 25.7 2381 69 25.7 3036 86 32.7 245 1708 81 38.3 2162 80 38.3 2757 111 51.9 270 1558 89 52.4 1999 89 52.4 2549 128 75.1 300 1402 108 82.5 1799 119 95 2294 149 113 330 1275 131 121 1636 160 149 2085 187 183 365 1071 173 204 1388 206 246 1760 265 319 402 971 213 300 1258 243 361 1596 299 435 445 878 303 476 1138 365 627 1444 408 677 490 797 348 683 1033 423 906 1311 474 980 542 720 443 1142 933 537 1384 1184 605 1582 600 651 570 1855 844 635 2055 1071 722 2349 660 592 832 2862 767 881 3153 973 1004 3721 Mixing Box Weights SIZE BOTTOM INTAKE (LBS.) SIDE INTAKE (LBS.) 122 244 239 135 262 255 150 296 288 165 312 301 182 347 338 200 384 375 222 417 408 245 479 469 270 517 506 300 590 578 330 661 648 365 756 743 402 861 846 445 975 959 490 1127 1109 542 1301 1282 600 1510 1489 660 1732 1710 EngineeringData Table 2. BCIFE Maximum RPM, Wheel Weights, and WR 2 (moment of inertia in lb-ft 2 ) CLASS I CLASS II CLASS III MAX. WEIGHT WR 2 MAX. WEIGHT WR 2 MAX. WEIGHT WR 2 SIZE RPM LB. LB-FT 2 RPM LB. LB-FT 2 RPM LB. LB-FT 2 122 3167 15 1.7 4119 15 1.7 5208 22 2.4 135 2874 17 2.4 3738 18 2.7 4726 27 3.9 150 2587 20 3.7 3364 21 4.1 4253 31 5.8 165 2352 24 5.7 3058 28 7 3867 38 8.4 182 2118 31 8.8 2729 39 10.8 3473 53 13.9 200 1932 38 12.5 2490 49 17.4 3169 63 19.8 222 1737 66 23.6 2238 74 28.8 2848 85 32 245 1577 81 38.3 2033 87 42.9 2587 110 50.9 270 1397 94 56.4 1803 103 64.6 2287 132 79.2 300 1257 113 88.8 1623 125 101 2059 172 139 330 1143 151 149 1475 167 158 1871 215 221 365 995 198 245 1283 214 260 1727 273 288 402 903 244 361 1163 254 382 1566 301 437 445 817 340 566 1052 392 692 1416 412 681 490 742 393 816 956 455 1001 1286 478 985 542 670 461 1209 863 542 1392 1162 604 1570 600 606 593 1954 780 642 2066 1050 793 2647 660 551 859 3008 710 975 3629 955 1068 4034 Windband Weights SIZE WINDBAND (LBS.) 122 69 135 82 150 100 165 86 182 133 200 164 222 199 245 238 270 267 300 323 330 388 365 471 402 563 445 684 490 825 542 997 600 1214 660 1463 Table 3. BAIFE and BCIFE Shaft & Bearings SIZE CLASS I CLASS II CLASS III ARR. 1 & 9 ARR. 8 ARR. 10 ARR. 1 & 9 ARR. 8 ARR. 10 ARR. 1 & 9 ARR. 8 SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE SHFT DIA. BRG TYPE 122 1 SDB 1 SDB 1 SDB 1 HDB (SDB) 1 SDB 1-3/16 SDB 135 1 SDB 1 SDB 1 SDB 1 HDB 1 SDB 1-3/16 SDB 150 1 SDB 1 SDB 1 SDB 1-3/16 HDB (SDB) 1 HDB 1-3/16 HDB (SDB) 165 1 SDB 1 SDB 1 SDB 1-3/16 HDB 1 HDB 1-3/16 HDB (SDB) 182 1-3/16 SDB 1 SDB 1-3/16 SDB 1-7/16 HDB 1 HDB 1-7/16 HDB 2-3/16 HDB 1-7/16 HDB 200 1-7/16 SDB 1 SDB 1-7/16 SDB 1-7/16 HDB 1 HDB 1-7/16 HDB 2-3/16 (2-7/16) HDB 1-7/16 HDB 222 1-7/16 SDB 1 SDB 1-7/16 SDB 1-15/16 HDB 1-3/16 HDB 1-7/16 HDB 2-7/16 HDB 1-15/16 (1-11/16) HDB 245 1-7/16 SDB 1-3/16 SDB 1-7/16 SDB 1-15/16 (2-3/16) HDB 1-3/16 HDB 1-15/16 HDB 2-7/16 (2-11/16) HDB 1-15/16 HDB 270 1-11/16 SDB 1-3/16 SDB 1-7/16 SDB 2-3/16 HDB 1-7/16 HDB 1-15/16 HDB 2-15/16 HDB 2-3/16 HDB (1-11/16) (RB) 300 1-15/16 HDB 1-3/16 HDB 1-15/16 HDB 2-3/16 HDB 1-7/16 HDB 2-3/16 HDB 2-7/16 RB 1-11/16 RB 330 1-15/16 HDB 1-7/16 SDB 1-15/16 HDB 2-7/16 HDB 1-11/16 HDB 2-7/16 (1-15/16) (2-3/16) HDB 2-11/16 RB 1-15/16 RB 365 1-15/16 HDB 1-11/16 SDB 1-15/16 HDB 2-7/16 HDB 2-3/16 HDB 2-7/16 HDB 2-11/16 RB 1-15/16 RB 402 2-3/16 HDB 1-15/16 HDB 2-3/16 HDB 2-7/16 RB 2-3/16 HDB 2-7/16 RB 2-15/16 RB 2-3/16 RB 445 2-7/16 HDB 2-3/16 HDB 2-7/16 HDB 2-11/16 RB 2-7/16 HDB 2-11/16 RB 3-7/16 RB 2-7/16 RB 490 2-11/16 HDB 2-7/16 HDB 2-11/16 HDB 2-15/16 RB 2-3/16 RB 2-15/16 RB 3-7/16 RB 2-7/16 RB 542 2-15/16 HDB 2-11/16 HDB 2-15/16 HDB 3-7/16 RB 2-7/16 RB 3-7/16 RB 3-15/16 RB 3-7/16 RB 600 2-15/16 HDB 2-11/16 RB 2-15/16 HDB 3-7/16 RB 2-11/16 RB 3-7/16 RB 4-7/16 SRB 3-7/16 RB 660 3-7/16 RB 2-15/16 RB RB 3-15/16 RB 3-7/16 RB 4-7/16 SRB 3-7/16 RB Note: Italicized values within the parenthesis are for BCIFE. Other value is for BAIFE. Where only one value exists, sizes and bearings types are the same between BAIFE and BCIFE. www.tcf.com 9

BAIFEWeights Table 4. Arr. 1 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II CLASS III SIZE LV MV HV XV LV MV HV XV LV MV HV XV 122 623 656 658 659 623 656 658 659 - - - - 135 733 735 749 739 734 737 750 740 - - - - 150 851 854 856 857 854 857 859 860 - - - - 165 915 919 921 923 922 925 928 929 - - - - 182 1173 1177 1179 1205 1185 1189 1191 1217 1206 1210 1212 1238 200 1344 1349 1353 1383 1356 1361 1365 1395 1395 1400 1404 1434 222 1589 1595 1599 1636 1597 1603 1608 1645 1635 1641 1646 1683 245 1938 1945 1951 1995 1949 1957 1963 2007 2012 2019 2025 2070 270 2164 2173 2164 2235 2174 2183 2174 2245 2242 2251 2242 2313 300 2492 2502 2511 2578 2512 2523 2532 2599 2580 2591 2599 2667 330 3075 3089 3099 3181 3103 3116 3126 3209 3163 3177 3187 3269 365 3620 3636 3648 3749 3659 3675 3687 3788 3711 3727 3739 3840 402 3883 4246 4260 4383 3905 4268 4282 4405 3982 4345 4359 4481 445 5619 5643 5660 5811 5689 5712 5730 5880 5802 5826 5843 5994 490 6575 6603 6625 6808 6656 6685 6706 6889 6805 6834 6856 7038 542 7764 7799 7824 8047 7889 7923 7949 8171 8135 8169 8195 8418 600 9183 9225 9257 9530 9266 9308 9339 9612 9670 9712 9744 10017 660 10934 10985 11022 11353 11106 11156 11194 11524 11471 11521 11559 11890 Table 5. Arr. 4 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV 122 633 633 668 669 633 633 668 669 135 751 751 767 757 752 752 768 758 150 861 861 866 867 862 862 867 868 165 954 954 960 962 958 958 964 966 182 1234 1234 1240 1266 1243 1243 1249 1275 200 1407 1407 1416 1446 1419 1419 1428 1458 222 1637 1637 1647 1684 1645 1645 1656 1693 245 1942 1942 1955 1999 1948 1948 1961 2006 270 2164 2164 2164 2235 2174 2174 2174 2245 300 2475 2475 2494 2561 2487 2487 2507 2574 330 3085 3085 3108 3191 3102 3102 3125 3208 365 3624 3624 3653 3754 3641 3641 3670 3771 Table 6. Arr. 9 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II CLASS III SIZE LV MV HV XV LV MV HV XV LV MV HV XV 122 699 706 708 709 699 706 708 709 - - - - 135 798 807 820 810 799 808 821 811 - - - - 150 909 916 918 920 912 919 922 923 - - - - 165 972 977 980 982 979 984 987 989 - - - - 182 1246 1257 1259 1285 1260 1271 1273 1299 1285 1297 1298 1324 200 1432 1447 1450 1480 1444 1459 1462 1492 1493 1508 1512 1541 222 1664 1674 1679 1716 1673 1683 1687 1724 1721 1730 1735 1772 245 2041 2048 2053 2098 2054 2061 2067 2111 2126 2133 2139 2183 270 2264 2271 2262 2333 2273 2281 2272 2343 2353 2360 2351 2422 300 2587 2601 2610 2677 2600 2614 2623 2690 2680 2695 2703 2771 330 3148 3157 3167 3249 3176 3184 3194 3277 3249 3257 3267 3350 365 3747 3758 3770 3872 3785 3797 3809 3910 3861 3873 3885 3986 402 4313 4322 4336 4459 4335 4344 4358 4481 4449 4458 4473 4595 445 5773 5779 5797 5947 5843 5848 5866 6016 5999 6004 6022 6172 490 6708 6708 6730 6913 6790 6790 6811 6994 6845 6845 6867 7050 542 7932 7932 7958 8180 8056 8056 8082 8304 8348 8348 8373 8596 600 9331 9331 9362 9635 9422 9422 9453 9726 9859 9859 9890 10163 660 11071 11071 11109 11440 11243 11243 11280 11611 11637 11637 11675 12005 Table 7. Arr. 10 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV 122 649 649 684 685 653 653 688 689 135 765 765 780 770 771 771 786 776 150 877 877 882 884 883 883 888 889 165 955 955 961 963 951 951 957 959 182 1219 1219 1225 1251 1237 1237 1243 1269 200 1379 1379 1387 1417 1399 1399 1408 1438 222 1614 1614 1625 1661 1628 1628 1639 1675 245 1916 1916 1929 1974 1934 1934 1947 1992 270 2126 2126 2126 2197 2148 2148 2148 2219 300 2418 2418 2437 2505 2434 2434 2453 2521 330 2982 2982 3005 3087 3016 3016 3039 3122 365 3504 3504 3532 3634 3544 3544 3572 3673 402 3741 3741 4119 4241 3762 3762 4139 4262 445 5435 5435 5477 5627 5511 5511 5553 5703 490 6331 6331 6381 6564 6410 6410 6460 6643 542 7447 7447 7507 7730 7566 7566 7626 7849 600 8775 8775 8849 9122 8860 8860 8934 9207 10 Twin City Fan Catalog 390

Table 8. Arr. 1 BCIFE Bare Fan Weights (Lbs.) CLASS I CLASS II CLASS III SIZE LV MV HV XV LV MV HV XV LV MV HV XV 122 623 656 658 659 626 659 661 662 635 669 670 671 135 733 735 749 739 734 737 750 740 749 751 765 755 150 851 854 856 857 854 857 859 860 872 875 877 879 165 915 919 921 923 922 925 928 929 940 943 946 948 182 1173 1177 1179 1205 1185 1189 1191 1217 1206 1210 1212 1238 200 1344 1349 1353 1383 1356 1361 1365 1395 1382 1387 1391 1421 222 1589 1595 1599 1636 1597 1603 1608 1645 1621 1627 1632 1669 245 1938 1945 1951 1995 1949 1957 1963 2007 1990 1998 2003 2048 270 2164 2173 2164 2235 2174 2183 2174 2245 2220 2229 2220 2291 300 2492 2502 2511 2578 2512 2523 2532 2599 2580 2591 2599 2667 330 3075 3089 3099 3181 3103 3116 3126 3209 3174 3187 3198 3280 365 3620 3636 3648 3749 3659 3675 3687 3788 3733 3749 3761 3863 402 3883 4246 4260 4383 3905 4268 4282 4405 3985 4348 4362 4485 445 5619 5643 5660 5811 5689 5712 5730 5880 5766 5790 5807 5958 490 6575 6603 6625 6808 6656 6685 6706 6889 6739 6767 6789 6972 542 7764 7799 7824 8047 7889 7923 7949 8171 8002 8036 8062 8284 600 9183 9225 9257 9530 9266 9308 9339 9612 9551 9593 9624 9897 660 10934 10985 11022 11353 11106 11156 11194 11524 11280 11330 11368 11699 Table 9. Arr. 4 BCIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV 122 633 633 668 669 636 636 671 672 135 751 751 767 757 752 752 768 758 150 861 861 866 867 862 862 867 868 165 954 954 960 962 958 958 964 966 182 1234 1234 1240 1266 1243 1243 1249 1275 200 1407 1407 1416 1446 1419 1419 1428 1458 222 1637 1637 1647 1684 1645 1645 1656 1693 245 1942 1942 1955 1999 1948 1948 1961 2006 270 2164 2164 2164 2235 2174 2174 2174 2245 300 2475 2475 2494 2561 2487 2487 2507 2574 330 3085 3085 3108 3191 3102 3102 3125 3208 365 3624 3624 3653 3754 3641 3641 3670 3771 Table 11. Arr. 9 BCIFE Bare Fan Weights (Lbs.) Table 10. Derating Factors For High Temperature (BCIFE Only) CLASS CLASS TEMP I II 70 1 1 200 0.99 0.95 250 0.98 0.93 300 0.98 0.91 400 0.96 0.88 500 0.93 0.84 600 0.9 0.81 700 0.8 0.78 800 0.6 0.75 CLASS I CLASS II CLASS III SIZE LV MV HV XV LV MV HV XV LV MV HV XV 122 699 706 708 709 702 709 711 712 716 723 724 725 135 798 807 820 810 799 808 821 811 821 830 843 833 150 909 916 918 920 912 919 922 923 939 946 948 950 165 972 977 980 982 979 984 987 989 1004 1010 1013 1014 182 1246 1257 1259 1285 1260 1271 1273 1299 1285 1297 1298 1324 200 1432 1447 1450 1480 1444 1459 1462 1492 1480 1495 1499 1528 222 1664 1674 1679 1716 1673 1683 1687 1724 1707 1716 1721 1758 245 2041 2048 2053 2098 2054 2061 2067 2111 2105 2111 2117 2162 270 2264 2271 2262 2333 2273 2281 2272 2343 2331 2338 2329 2400 300 2587 2601 2610 2677 2600 2614 2623 2690 2680 2695 2703 2771 330 3148 3157 3167 3249 3176 3184 3194 3277 3259 3268 3278 3361 365 3747 3758 3770 3872 3785 3797 3809 3910 3883 3895 3907 4008 402 4313 4322 4336 4459 4335 4344 4358 4481 4452 4462 4476 4598 445 5773 5779 5797 5947 5843 5848 5866 6016 5963 5968 5986 6136 490 6708 6708 6730 6913 6790 6790 6811 6994 6779 6779 6800 6983 542 7932 7932 7958 8180 8056 8056 8082 8304 8214 8214 8240 8462 600 9331 9331 9362 9635 9422 9422 9453 9726 9739 9739 9770 10043 660 11071 11071 11109 11440 11243 11243 11280 11611 11446 11446 11483 11814 BCIFEWeights Table 12. Arr. 10 BCIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV 122 649 649 684 685 656 656 691 692 135 765 765 780 770 771 771 786 776 150 877 877 882 884 883 883 888 889 165 955 955 961 963 951 951 957 959 182 1219 1219 1225 1251 1237 1237 1243 1269 200 1379 1379 1387 1417 1399 1399 1408 1438 222 1614 1614 1625 1661 1628 1628 1639 1675 245 1916 1916 1929 1974 1934 1934 1947 1992 270 2126 2126 2126 2197 2148 2148 2148 2219 300 2418 2418 2437 2505 2434 2434 2453 2521 330 2982 2982 3005 3087 3016 3016 3039 3122 365 3504 3504 3532 3634 3544 3544 3572 3673 402 3741 3741 4119 4241 3762 3762 4139 4262 445 5435 5435 5477 5627 5511 5511 5553 5703 490 6331 6331 6381 6564 6410 6410 6460 6643 542 7447 7447 7507 7730 7566 7566 7626 7849 600 8775 8775 8849 9122 8860 8860 8934 9207 www.tcf.com 11

PerformanceData 122 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 625 1164 1292 0.09 184% 1560 0.16 188% 2008 0.33 203% 1000 1862 1726 0.20 180% 1955 0.30 182% 2319 0.52 186% 2628 0.76 190% 2914 1.02 195% 3182 1.31 202% 1375 2561 2202 0.38 179% 2393 0.52 180% 2721 0.82 182% 2995 1.11 184% 3240 1.42 186% 3467 1.75 188% 3684 2.09 191% 3893 2.45 194% 1750 3259 2703 0.68 179% 2863 0.86 180% 3150 1.22 181% 3406 1.59 182% 3634 1.97 183% 3839 2.34 184% 4034 2.73 186% 4219 3.14 187% 2125 3957 3221 1.13 179% 3352 1.33 179% 3607 1.77 180% 3837 2.20 181% 4051 2.66 182% 4248 3.11 183% 4430 3.57 184% 2500 4655 3747 1.75 179% 3857 1.98 179% 4082 2.49 180% 4291 3.00 180% 4485 3.50 181% 2875 5354 4278 2.58 178% 4374 2.84 179% 4568 3.39 179% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 3990 Windband Outlet Area: 1.80 ft 2 Wheel Dia.: 12.25" Max Class II RPM = 4600 Tip Speed FPM = 3.21 x RPM Nozzle Outlet Area: 0.537 ft² Nozzle Outlet Area: 0.537 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 400 745 1202 0.05 179% 1522 0.10 184% 700 1304 1640 0.11 175% 1878 0.17 176% 2281 0.34 180% 2642 0.54 183% 2955 0.76 189% 3215 0.98 194% 3457 1.21 200% 1000 1862 2152 0.22 174% 2336 0.31 175% 2669 0.50 176% 2969 0.72 178% 3237 0.96 180% 3493 1.23 182% 3745 1.53 183% 3979 1.86 185% 1300 2421 2702 0.42 173% 2842 0.52 174% 3120 0.74 175% 3376 0.99 176% 3619 1.26 177% 3845 1.56 178% 4055 1.86 179% 4256 2.18 180% 1600 2980 3268 0.72 173% 3379 0.83 173% 3611 1.10 175% 3834 1.38 175% 4044 1.67 176% 4247 1.99 176% 4442 2.33 177% 1900 3538 3843 1.16 173% 3936 1.29 173% 4127 1.57 174% 4323 1.89 175% 4511 2.23 175% 2200 4097 4422 1.75 173% 4502 1.90 173% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.403 ft² 300 559 1216 0.04 174% 1547 0.08 174% 2022 0.19 188% 525 978 1621 0.08 176% 1889 0.13 175% 2316 0.27 174% 2685 0.43 174% 2999 0.61 177% 3263 0.79 182% 3509 0.99 187% 750 1397 2087 0.15 177% 2307 0.22 176% 2684 0.38 175% 3004 0.57 174% 3286 0.76 174% 3553 0.99 174% 3806 1.23 173% 4039 1.49 175% 975 1816 2591 0.27 177% 2769 0.36 177% 3095 0.55 176% 3385 0.76 175% 3650 0.99 175% 3889 1.23 174% 4111 1.48 174% 4322 1.74 174% 1200 2235 3116 0.46 177% 3259 0.56 177% 3544 0.78 177% 3802 1.02 176% 4042 1.27 175% 4268 1.54 175% 4480 1.83 175% 1425 2654 3651 0.73 178% 3771 0.84 177% 4014 1.09 177% 4249 1.36 177% 4466 1.64 176% 1650 3073 4192 1.10 178% 4296 1.22 178% 4504 1.48 177% MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.537 ft² Nozzle Outlet Area: 0.403 ft² 575 1427 1282 0.09 215% 1560 0.16 229% 925 2295 1713 0.20 206% 1944 0.30 213% 2317 0.52 223% 2632 0.76 231% 2917 1.01 236% 3202 1.30 242% 1275 3164 2198 0.40 205% 2380 0.54 207% 2710 0.83 213% 2990 1.12 218% 3243 1.43 224% 3477 1.76 229% 3692 2.09 232% 3897 2.43 234% 1625 4032 2708 0.73 205% 2855 0.90 205% 3139 1.26 209% 3395 1.62 213% 3624 1.99 215% 3837 2.37 219% 4037 2.76 223% 4228 3.17 226% 1975 4901 3228 1.22 205% 3357 1.42 205% 3592 1.84 206% 3825 2.28 209% 4040 2.72 212% 4236 3.16 214% 4421 3.61 216% 4598 4.07 218% 2325 5769 3756 1.90 206% 3869 2.14 205% 4075 2.62 205% 4274 3.11 206% 4473 3.63 209% 2675 6638 4288 2.81 206% 4389 3.08 205% 4576 3.63 205% 500 1241 1363 0.07 214% 1622 0.13 225% 2052 0.26 237% 775 1923 1816 0.15 207% 2035 0.23 212% 2388 0.40 221% 2684 0.59 228% 2953 0.79 232% 1050 2605 2312 0.29 206% 2490 0.40 208% 2804 0.61 213% 3071 0.84 218% 3312 1.08 223% 3533 1.34 227% 3735 1.59 229% 3932 1.87 231% 1325 3288 2832 0.51 206% 2975 0.64 206% 3253 0.91 210% 3497 1.18 213% 3716 1.46 215% 3920 1.76 218% 4111 2.06 222% 4293 2.38 225% 1600 3970 3360 0.84 207% 3486 0.99 206% 3718 1.30 207% 3946 1.63 210% 4151 1.96 212% 4338 2.29 213% 4516 2.64 215% 1875 4653 3894 1.28 208% 4007 1.46 207% 4209 1.81 206% 4408 2.19 207% 2150 5335 4433 1.87 208% 4534 2.07 207% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.403 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 375 931 1353 0.05 204% 1627 0.10 215% 2072 0.21 226% 575 1427 1758 0.10 197% 2001 0.17 202% 2379 0.31 212% 2686 0.46 218% 2970 0.63 222% 775 1923 2191 0.19 195% 2407 0.27 198% 2754 0.44 203% 3043 0.63 209% 3298 0.82 214% 3525 1.03 217% 3735 1.24 219% 3946 1.47 221% 975 2419 2652 0.31 195% 2830 0.41 195% 3156 0.63 200% 3424 0.85 203% 3663 1.07 206% 3881 1.31 210% 4084 1.56 213% 4274 1.81 216% 1175 2916 3122 0.49 195% 3279 0.61 195% 3567 0.86 197% 3826 1.13 200% 4051 1.39 202% 4258 1.65 204% 4451 1.93 206% 1375 3412 3599 0.74 196% 3741 0.88 195% 3994 1.16 195% 4236 1.47 198% 4455 1.77 200% 1575 3908 4080 1.06 196% 4210 1.22 195% 4439 1.54 195% 12 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 500 1866 1281 0.09 261% 1555 0.15 270% 2067 0.32 275% 800 2985 1719 0.21 249% 1938 0.30 257% 2297 0.50 266% 2637 0.74 273% 2964 1.00 278% 3271 1.29 275% 1100 4104 2197 0.42 246% 2382 0.55 250% 2697 0.81 258% 2969 1.09 264% 3213 1.38 266% 3462 1.69 271% 3706 2.04 275% 3944 2.40 277% 1400 5224 2696 0.78 245% 2854 0.94 246% 3132 1.26 252% 3377 1.60 256% 3604 1.95 262% 3806 2.30 264% 3995 2.66 265% 4191 3.04 268% 1700 6343 3209 1.30 245% 3344 1.49 245% 3592 1.88 248% 3814 2.28 252% 4017 2.68 255% 4211 3.10 258% 4395 3.53 262% 4562 3.95 264% 2000 7463 3729 2.04 246% 3847 2.26 245% 4068 2.71 246% 4272 3.17 249% 4460 3.64 251% 2300 8582 4254 3.02 246% 4359 3.27 245% 4557 3.78 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.268 ft² Nozzle Outlet Area: 0.268 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 425 1586 1307 0.07 262% 1573 0.12 270% 2084 0.26 274% 675 2519 1763 0.15 251% 1975 0.22 258% 2324 0.38 266% 2656 0.57 273% 2984 0.79 277% 3297 1.04 275% 925 3451 2256 0.30 248% 2436 0.40 251% 2742 0.60 259% 3005 0.81 264% 3244 1.04 267% 3487 1.29 271% 3727 1.56 274% 3968 1.86 277% 1175 4384 2770 0.55 248% 2923 0.66 249% 3194 0.91 253% 3431 1.16 258% 3652 1.43 262% 3846 1.71 264% 4034 1.99 266% 4226 2.29 268% 1425 5317 3296 0.91 248% 3428 1.05 248% 3670 1.34 250% 3885 1.64 253% 4083 1.95 256% 4272 2.27 260% 4450 2.60 263% 1675 6250 3830 1.41 248% 3945 1.58 248% 4161 1.91 249% 4359 2.26 251% 4541 2.61 253% 1925 7183 4368 2.09 249% 4471 2.27 248% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 450 3358 1513 0.14 360% 1817 0.23 369% 2297 0.42 384% 650 4851 1953 0.32 355% 2166 0.42 360% 2591 0.66 368% 2951 0.93 376% 3268 1.21 384% 850 6343 2446 0.63 356% 2597 0.74 355% 2931 1.02 362% 3261 1.34 366% 3555 1.68 370% 3825 2.03 376% 4076 2.40 381% 4309 2.77 384% 1050 7836 2945 1.10 354% 3082 1.25 356% 3333 1.55 357% 3606 1.90 361% 3880 2.30 365% 4132 2.70 367% 4368 3.12 370% 4591 3.54 373% 1250 9328 3452 1.78 353% 3578 1.97 355% 3786 2.30 355% 4005 2.68 357% 4235 3.10 361% 4467 3.56 363% 1450 10821 3964 2.69 352% 4078 2.92 354% 4273 3.33 356% 4447 3.71 355% 1650 12313 4479 3.89 352% 4583 4.15 354% XV7 (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.268 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 325 1213 1289 0.05 251% 1565 0.09 258% 2080 0.21 261% 525 1959 1726 0.11 240% 1959 0.17 247% 2323 0.30 254% 2658 0.45 261% 2985 0.63 265% 3296 0.83 262% 725 2705 2198 0.21 236% 2401 0.29 240% 2733 0.45 247% 3007 0.63 252% 3254 0.81 254% 3498 1.02 258% 3737 1.24 262% 3974 1.49 264% 925 3451 2690 0.37 236% 2868 0.47 237% 3168 0.67 242% 3425 0.88 246% 3658 1.11 251% 3859 1.33 252% 4052 1.56 254% 4246 1.81 256% 1125 4198 3195 0.61 236% 3351 0.73 236% 3626 0.97 239% 3863 1.22 242% 4076 1.48 245% 4278 1.74 248% 4463 2.01 251% 1325 4944 3708 0.95 236% 3847 1.09 236% 4096 1.37 237% 4319 1.66 240% 4519 1.95 242% 1525 5690 4227 1.40 237% 4351 1.56 236% 4578 1.87 236% Nozzle Outlet Area: 0.134 ft² Nozzle Outlet Area: 0.134 ft² 400 2985 1453 0.10 367% 1759 0.17 376% 2251 0.32 393% 575 4291 1868 0.22 361% 2075 0.29 366% 2503 0.48 376% 2874 0.70 386% 3197 0.92 393% 750 5597 2333 0.43 361% 2480 0.52 361% 2806 0.72 369% 3140 0.97 374% 3441 1.23 379% 3721 1.51 385% 3980 1.81 391% 4214 2.11 394% 925 6903 2805 0.76 359% 2938 0.86 362% 3180 1.08 363% 3450 1.34 369% 3726 1.64 372% 3983 1.96 375% 4224 2.28 378% 4454 2.63 382% 1100 8209 3283 1.22 358% 3404 1.35 361% 3607 1.59 361% 3819 1.86 363% 4047 2.17 368% 4279 2.52 371% 4507 2.89 373% 1275 9515 3767 1.84 357% 3876 2.00 360% 4067 2.29 362% 4235 2.56 361% 4421 2.89 363% 1450 10821 4254 2.65 357% 4353 2.83 359% 4533 3.18 361% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.134 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 300 2239 1349 0.07 357% 1663 0.12 364% 450 3358 1732 0.14 350% 1965 0.21 356% 2400 0.35 363% 2760 0.52 371% 3069 0.69 376% 600 4478 2182 0.29 351% 2346 0.36 351% 2699 0.53 357% 3033 0.72 361% 3326 0.93 364% 3595 1.15 369% 3843 1.37 374% 4068 1.60 376% 750 5597 2640 0.51 350% 2787 0.60 351% 3055 0.78 352% 3338 1.00 356% 3615 1.24 359% 3867 1.49 361% 4102 1.75 364% 4322 2.02 366% 900 6716 3106 0.84 349% 3242 0.95 351% 3463 1.15 350% 3694 1.38 352% 3930 1.64 356% 4165 1.92 358% 4390 2.22 359% 4600 2.52 361% 1050 7836 3578 1.28 348% 3701 1.42 350% 3909 1.66 351% 4093 1.90 350% 4293 2.17 352% 4496 2.47 355% 1200 8955 4054 1.86 348% 4166 2.02 349% 4364 2.32 351% 4529 2.58 351% www.tcf.com 13

PerformanceData 135 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 750 1150 1165 0.11 184% 1409 0.19 188% 1225 1879 1576 0.24 180% 1783 0.37 182% 2112 0.64 186% 2391 0.93 190% 2650 1.25 195% 2892 1.60 201% 1700 2607 2028 0.49 180% 2199 0.66 180% 2494 1.02 182% 2741 1.38 184% 2963 1.76 186% 3167 2.16 188% 3361 2.58 190% 3550 3.03 193% 2175 3336 2503 0.88 179% 2646 1.10 180% 2903 1.54 181% 3133 2.01 182% 3338 2.47 183% 3523 2.94 184% 3698 3.42 185% 3865 3.92 187% 2650 4064 2995 1.47 179% 3110 1.72 179% 3338 2.27 180% 3543 2.80 181% 3734 3.37 181% 3912 3.94 183% 4077 4.51 183% 4230 5.07 184% 3125 4793 3494 2.30 179% 3591 2.58 179% 3789 3.22 180% 3976 3.86 181% 4149 4.49 181% 3600 5521 3997 3.41 178% 4081 3.73 179% 4252 4.42 179% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 3265 Windband Outlet Area: 2.18 ft 2 Wheel Dia.: 13.50" Max Class II RPM = 4259 Tip Speed FPM = 3.53 x RPM Nozzle Outlet Area: 0.652 ft² Nozzle Outlet Area: 0.652 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 475 729 1080 0.06 179% 1375 0.12 184% 850 1304 1488 0.13 175% 1704 0.21 176% 2069 0.41 180% 2398 0.66 183% 2681 0.92 189% 2917 1.19 194% 3137 1.47 200% 1225 1879 1967 0.27 174% 2133 0.38 175% 2433 0.61 176% 2704 0.88 178% 2946 1.17 180% 3177 1.50 181% 3405 1.87 183% 3617 2.26 185% 1600 2454 2481 0.52 173% 2606 0.64 174% 2856 0.92 175% 3087 1.22 176% 3305 1.56 177% 3509 1.92 178% 3699 2.29 179% 3880 2.68 180% 1975 3029 3011 0.92 173% 3110 1.05 173% 3317 1.37 175% 3517 1.72 175% 3705 2.08 175% 3887 2.47 176% 4063 2.89 177% 4231 3.33 178% 2350 3604 3548 1.48 173% 3631 1.64 173% 3800 1.98 174% 3976 2.38 175% 4144 2.80 175% 2725 4179 4090 2.25 173% 4161 2.43 173% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.489 ft² 350 537 1086 0.04 174% 1391 0.10 174% 650 997 1489 0.10 176% 1730 0.17 175% 2115 0.33 174% 2447 0.53 173% 2734 0.76 176% 2974 0.98 181% 3195 1.21 186% 950 1457 1958 0.20 177% 2152 0.29 176% 2486 0.49 175% 2774 0.72 174% 3026 0.96 174% 3261 1.23 174% 3488 1.53 173% 3700 1.85 173% 1250 1917 2465 0.38 177% 2617 0.49 177% 2904 0.73 176% 3160 0.99 175% 3395 1.27 174% 3611 1.58 174% 3808 1.89 174% 3995 2.21 174% 1550 2377 2991 0.66 177% 3113 0.78 177% 3358 1.07 177% 3585 1.37 176% 3795 1.67 175% 3994 2.01 175% 4182 2.37 174% 1850 2837 3527 1.07 178% 3629 1.20 177% 3834 1.51 177% 4038 1.87 177% 4229 2.22 176% 2150 3298 4068 1.62 178% 4156 1.78 178% MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.652 ft² Nozzle Outlet Area: 0.489 ft² 700 1431 1164 0.11 215% 1416 0.19 229% 1150 2352 1581 0.26 206% 1788 0.38 213% 2123 0.65 222% 2408 0.95 231% 2661 1.25 235% 2914 1.60 241% 1600 3272 2050 0.53 205% 2209 0.70 206% 2505 1.06 213% 2756 1.42 217% 2982 1.81 223% 3192 2.22 228% 3386 2.62 231% 3569 3.04 233% 2050 4192 2542 0.98 205% 2671 1.19 205% 2920 1.64 208% 3150 2.10 212% 3354 2.56 215% 3545 3.03 217% 3724 3.52 221% 3894 4.03 224% 2500 5112 3043 1.66 205% 3156 1.91 205% 3361 2.43 205% 3566 2.99 208% 3759 3.55 211% 3934 4.11 213% 4099 4.67 215% 4256 5.24 216% 2950 6033 3551 2.61 206% 3650 2.91 205% 3832 3.51 205% 4004 4.13 206% 4178 4.79 208% 3400 6953 4064 3.89 206% 4152 4.23 205% 600 1227 1228 0.08 214% 1464 0.15 225% 1859 0.32 238% 925 1892 1627 0.18 207% 1827 0.27 213% 2149 0.48 222% 2419 0.70 229% 2669 0.95 233% 1250 2556 2063 0.34 206% 2227 0.46 208% 2515 0.72 213% 2759 1.00 218% 2979 1.29 224% 3180 1.59 228% 3365 1.90 230% 3549 2.23 232% 1575 3221 2521 0.59 206% 2653 0.74 206% 2909 1.06 210% 3132 1.39 213% 3333 1.73 216% 3519 2.08 219% 3694 2.44 223% 3861 2.82 226% 1900 3885 2986 0.96 207% 3102 1.14 206% 3318 1.51 207% 3528 1.90 210% 3714 2.29 212% 3886 2.69 214% 4049 3.10 216% 4204 3.53 218% 2225 4550 3458 1.46 208% 3561 1.67 206% 3749 2.09 206% 3933 2.54 208% 4112 3.00 210% 2550 5215 3933 2.12 208% 4026 2.36 207% 4196 2.84 206% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.489 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 450 920 1220 0.06 204% 1469 0.12 216% 725 1483 1636 0.13 197% 1855 0.22 202% 2195 0.39 211% 2472 0.58 218% 2720 0.78 221% 2976 1.03 227% 1000 2045 2088 0.26 195% 2275 0.37 197% 2586 0.59 202% 2843 0.82 207% 3070 1.07 212% 3277 1.33 216% 3463 1.59 218% 3642 1.87 220% 1275 2607 2565 0.45 195% 2718 0.58 195% 3002 0.86 199% 3242 1.15 202% 3454 1.44 204% 3648 1.74 207% 3828 2.05 211% 3998 2.38 213% 1550 3170 3051 0.74 195% 3187 0.90 195% 3431 1.22 196% 3659 1.57 199% 3860 1.91 201% 4043 2.26 203% 4213 2.61 204% 1825 3732 3544 1.14 196% 3666 1.32 195% 3881 1.69 195% 4085 2.08 196% 2100 4294 4041 1.67 196% 4151 1.88 195% 14 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 600 1840 1155 0.10 262% 1406 0.18 270% 1873 0.39 274% 975 2991 1563 0.25 249% 1762 0.37 256% 2087 0.62 266% 2395 0.90 274% 2691 1.22 278% 2970 1.57 276% 1350 4141 2010 0.53 246% 2178 0.68 249% 2462 1.01 257% 2709 1.35 264% 2927 1.69 266% 3151 2.08 270% 3370 2.50 274% 3585 2.94 277% 1725 5291 2478 0.98 245% 2619 1.17 246% 2870 1.57 251% 3090 1.99 256% 3295 2.42 261% 3479 2.85 264% 3648 3.29 265% 3822 3.76 267% 2100 6442 2957 1.66 245% 3079 1.89 245% 3301 2.37 248% 3501 2.86 251% 3683 3.35 254% 3857 3.87 258% 4023 4.40 261% 4176 4.93 263% 2475 7592 3444 2.61 246% 3549 2.88 245% 3747 3.44 246% 3930 4.01 249% 4099 4.58 251% 4257 5.17 253% 2850 8742 3935 3.88 246% 4028 4.19 245% 4205 4.83 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.326 ft² Nozzle Outlet Area: 0.326 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 500 1534 1166 0.08 263% 1413 0.14 271% 800 2454 1571 0.17 251% 1767 0.26 259% 2088 0.45 267% 2395 0.67 274% 2700 0.94 278% 1100 3374 2012 0.35 248% 2177 0.46 252% 2458 0.70 259% 2697 0.96 265% 2920 1.23 267% 3144 1.53 272% 3367 1.87 275% 3589 2.23 277% 1400 4294 2472 0.63 248% 2613 0.77 249% 2860 1.06 253% 3079 1.37 258% 3280 1.69 263% 3456 2.02 265% 3631 2.36 266% 3808 2.73 269% 1700 5215 2943 1.05 248% 3064 1.22 248% 3286 1.57 251% 3483 1.92 254% 3664 2.29 257% 3837 2.68 260% 3999 3.07 263% 4144 3.46 264% 2000 6135 3420 1.64 248% 3527 1.83 248% 3724 2.23 249% 3906 2.65 251% 4073 3.07 253% 4229 3.50 255% 2300 7055 3903 2.42 249% 3997 2.64 248% 4175 3.10 248% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 550 3374 1378 0.17 361% 1653 0.28 369% 2088 0.51 383% 775 4755 1746 0.37 355% 1944 0.49 360% 2334 0.78 369% 2662 1.10 377% 2950 1.44 383% 1000 6135 2160 0.70 356% 2301 0.84 355% 2616 1.17 363% 2919 1.55 367% 3189 1.95 371% 3436 2.37 377% 3665 2.81 382% 1225 7515 2578 1.20 355% 2704 1.37 356% 2945 1.73 358% 3204 2.15 363% 3458 2.62 366% 3690 3.09 368% 3906 3.58 371% 4110 4.09 375% 1450 8896 3003 1.90 354% 3120 2.12 356% 3315 2.50 355% 3529 2.96 359% 3747 3.46 362% 3967 4.01 364% 4172 4.56 366% 1675 10276 3432 2.84 353% 3539 3.10 355% 3719 3.56 356% 3889 4.02 356% 4075 4.56 358% 1900 11656 3864 4.06 352% 3962 4.36 354% 4134 4.91 356% XV7 (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: 0.326 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 400 1227 1178 0.06 251% 1426 0.11 258% 1890 0.25 262% 650 1994 1588 0.13 240% 1797 0.21 246% 2124 0.37 253% 2424 0.55 260% 2716 0.77 264% 2996 1.02 263% 900 2761 2030 0.27 236% 2213 0.36 240% 2511 0.57 247% 2759 0.78 252% 2978 1.01 254% 3196 1.26 257% 3409 1.53 261% 3620 1.83 263% 1150 3528 2491 0.48 236% 2650 0.60 237% 2920 0.85 242% 3150 1.11 246% 3360 1.39 250% 3543 1.66 252% 3714 1.95 253% 3887 2.26 255% 1400 4294 2963 0.79 236% 3103 0.94 236% 3349 1.24 239% 3562 1.55 242% 3753 1.86 244% 3934 2.19 247% 4102 2.53 250% 4255 2.86 252% 1650 5061 3443 1.23 236% 3567 1.41 236% 3790 1.76 237% 3989 2.11 239% 4169 2.48 241% 1900 5828 3929 1.82 237% 4039 2.02 236% 4242 2.42 236% Nozzle Outlet Area: 0.163 ft² Nozzle Outlet Area: 0.163 ft² 475 2914 1302 0.12 367% 1584 0.20 377% 700 4294 1699 0.27 361% 1885 0.36 366% 2273 0.59 376% 2609 0.85 385% 2903 1.12 393% 925 5675 2145 0.55 361% 2277 0.65 361% 2567 0.90 368% 2867 1.20 374% 3138 1.53 378% 3390 1.87 384% 3626 2.23 390% 3839 2.60 393% 1150 7055 2599 0.98 359% 2719 1.12 362% 2931 1.37 362% 3170 1.70 368% 3415 2.07 372% 3646 2.45 375% 3863 2.86 377% 4070 3.28 381% 1375 8436 3060 1.60 358% 3167 1.77 361% 3349 2.07 361% 3532 2.40 363% 3732 2.78 367% 3935 3.20 370% 4139 3.66 372% 1600 9816 3525 2.45 357% 3622 2.65 360% 3792 3.02 362% 3940 3.36 361% 4100 3.75 363% 1825 11196 3994 3.56 357% 4081 3.80 359% 4240 4.24 361% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.163 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP 375 2301 1242 0.08 357% 1524 0.15 363% 575 3528 1634 0.20 351% 1833 0.27 355% 2218 0.46 362% 2540 0.66 368% 2822 0.88 375% 775 4755 2085 0.41 351% 2227 0.50 351% 2525 0.71 355% 2820 0.96 360% 3082 1.22 362% 3321 1.49 366% 3544 1.78 370% 3751 2.07 374% 975 5982 2544 0.75 350% 2674 0.87 351% 2898 1.09 351% 3138 1.36 355% 3376 1.67 358% 3603 1.99 360% 3812 2.31 362% 4008 2.65 364% 1175 7209 3011 1.24 349% 3129 1.39 351% 3322 1.66 351% 3511 1.94 351% 3710 2.26 354% 3909 2.61 357% 4106 2.99 358% 1375 8436 3483 1.92 348% 3589 2.10 350% 3773 2.43 351% 3928 2.74 351% 4090 3.07 351% 1575 9663 3959 2.82 348% 4055 3.03 349% 4227 3.43 351% www.tcf.com 15

PerformanceData 150 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 925 1149 1048 0.13 184% 1268 0.24 188% 1600 1988 1478 0.33 180% 1658 0.50 182% 1949 0.85 185% 2421 1.63 193% 2275 2826 1951 0.72 179% 2098 0.96 180% 2353 1.43 182% 2763 2.41 185% 3110 3.47 188% 3428 4.62 192% 3727 5.85 198% 2950 3665 2452 1.38 179% 2568 1.67 179% 2787 2.28 180% 3164 3.52 182% 3478 4.78 184% 3761 6.10 186% 4021 7.50 188% 3625 4503 2965 2.39 179% 3058 2.72 179% 3247 3.47 180% 3584 4.95 181% 3882 6.51 182% 4145 8.05 184% 4300 5342 3485 3.84 178% 3564 4.22 179% 3723 5.06 179% 4027 6.83 180% 4975 6180 4010 5.80 178% 4077 6.23 179% 4213 7.16 179% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 3260 Windband Outlet Area: 2.70 ft 2 Wheel Dia.: 15.00" Max Class II RPM = 4252 Tip Speed FPM = 3.93 x RPM Nozzle Outlet Area: 0.805 ft² Nozzle Outlet Area: 0.805 ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 600 745 981 0.07 178% 1243 0.15 183% 1125 1398 1407 0.18 175% 1592 0.29 176% 1912 0.54 179% 2452 1.20 186% 2862 1.90 195% 1650 2050 1905 0.41 174% 2043 0.55 175% 2298 0.85 176% 2743 1.57 179% 3129 2.43 182% 3496 3.46 184% 3810 4.50 189% 4081 5.52 193% 2175 2702 2437 0.83 173% 2538 0.99 174% 2747 1.36 175% 3125 2.18 176% 3467 3.13 178% 3774 4.16 180% 4063 5.29 181% 2700 3354 2982 1.50 173% 3063 1.68 173% 3229 2.09 174% 3555 3.04 175% 3855 4.07 176% 4138 5.23 177% 3225 4006 3534 2.47 173% 3601 2.68 173% 3737 3.13 174% 4019 4.21 175% 3750 4658 4089 3.80 173% 4146 4.03 173% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP Nozzle Outlet Area: 0.603 ft² 750 1244 1113 0.11 214% 1324 0.19 225% 1676 0.40 237% 1225 2032 1543 0.25 207% 1717 0.38 212% 1999 0.65 219% 2449 1.24 231% 1700 2819 2017 0.53 206% 2151 0.69 207% 2400 1.04 212% 2802 1.78 220% 3142 2.59 227% 3443 3.45 231% 3755 4.46 236% 2175 3607 2509 0.97 207% 2619 1.18 206% 2828 1.61 208% 3194 2.51 213% 3506 3.46 218% 3786 4.48 224% 4042 5.52 228% 2650 4395 3009 1.64 207% 3105 1.89 206% 3278 2.39 206% 3613 3.48 211% 3900 4.58 213% 4160 5.73 217% 3125 5182 3515 2.57 208% 3599 2.86 207% 3753 3.45 206% 4044 4.69 208% 3600 5970 4024 3.82 208% 4099 4.16 207% 4239 4.83 206% 450 559 993 0.06 174% 1263 0.12 173% 1652 0.28 188% 875 1087 1420 0.14 177% 1626 0.23 175% 1965 0.44 174% 2510 0.98 174% 2929 1.58 182% 1300 1615 1916 0.31 177% 2077 0.43 177% 2362 0.69 175% 2834 1.31 174% 3227 2.01 174% 3590 2.85 173% 3913 3.74 175% 4192 4.63 179% 1725 2143 2450 0.62 178% 2571 0.76 177% 2812 1.09 177% 3228 1.80 175% 3591 2.62 175% 3908 3.48 174% 4201 4.42 174% 2150 2671 2999 1.12 178% 3097 1.28 177% 3293 1.65 177% 3662 2.48 176% 3990 3.38 175% 2575 3199 3557 1.84 178% 3638 2.03 178% 3801 2.43 177% 4127 3.40 177% 3000 3727 4119 2.83 178% 4189 3.05 178% MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP Nozzle Outlet Area: 0.805 ft² Nozzle Outlet Area: 0.603 ft² 875 1451 1055 0.13 215% 1280 0.24 228% 1654 0.49 243% 1500 2488 1481 0.35 206% 1662 0.52 212% 1958 0.87 220% 2431 1.63 233% 2125 3524 1963 0.78 205% 2097 1.00 206% 2354 1.48 212% 2771 2.46 220% 3127 3.52 229% 3440 4.62 233% 3742 5.82 237% 2750 4561 2465 1.51 205% 2575 1.79 205% 2781 2.37 207% 3160 3.60 213% 3481 4.86 218% 3771 6.20 224% 4040 7.60 228% 3375 5597 2976 2.61 206% 3071 2.96 205% 3243 3.65 205% 3577 5.14 209% 3875 6.65 213% 4141 8.16 216% 4000 6633 3493 4.19 206% 3575 4.59 205% 3729 5.41 205% 4012 7.09 206% 4625 7670 4014 6.32 206% 4087 6.78 206% 4225 7.72 205% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.603 ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 550 912 1092 0.08 204% 1317 0.15 216% 925 1534 1507 0.18 196% 1702 0.28 202% 2005 0.50 210% 2471 0.99 220% 1300 2156 1961 0.36 195% 2122 0.49 196% 2398 0.78 202% 2828 1.40 210% 3180 2.07 217% 3488 2.78 220% 3803 3.62 225% 1675 2778 2438 0.65 195% 2570 0.82 195% 2815 1.19 198% 3215 1.93 203% 3546 2.72 208% 3839 3.57 214% 4102 4.44 217% 2050 3400 2924 1.10 195% 3041 1.30 195% 3248 1.72 195% 3625 2.63 200% 3936 3.54 203% 4213 4.50 206% 2425 4022 3416 1.71 196% 3520 1.96 195% 3704 2.45 195% 4045 3.49 198% 2800 4643 3912 2.54 196% 4005 2.83 195% 4174 3.39 195% 16 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 725 1803 1028 0.12 262% 1258 0.22 271% 1275 3172 1467 0.35 248% 1641 0.50 255% 1927 0.82 265% 2444 1.58 277% 2918 2.49 274% 1825 4540 1952 0.82 245% 2094 1.03 248% 2338 1.45 255% 2741 2.36 264% 3106 3.38 270% 3464 4.52 276% 3809 5.77 278% 4132 7.10 275% 2375 5908 2458 1.62 245% 2575 1.88 246% 2787 2.43 249% 3147 3.56 257% 3461 4.75 264% 3736 5.97 266% 4019 7.32 270% 2925 7276 2975 2.85 246% 3074 3.17 245% 3258 3.83 247% 3582 5.19 252% 3867 6.60 257% 4131 8.07 262% 3475 8644 3500 4.63 246% 3585 5.01 245% 3746 5.78 245% 4039 7.38 249% 4025 10012 4028 7.04 246% 4102 7.48 246% 4245 8.36 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.402 ft² Nozzle Outlet Area: 0.402 ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 625 1555 1057 0.10 263% 1276 0.17 270% 1075 2674 1505 0.25 250% 1674 0.37 256% 1951 0.62 265% 2460 1.23 276% 1525 3794 1996 0.57 248% 2134 0.72 250% 2372 1.05 256% 2763 1.75 265% 3123 2.55 270% 3480 3.48 276% 3831 4.54 277% 1975 4913 2506 1.10 248% 2620 1.30 248% 2828 1.71 251% 3180 2.56 259% 3483 3.47 264% 3757 4.43 266% 4036 5.50 270% 2425 6032 3027 1.92 248% 3124 2.16 248% 3304 2.65 249% 3621 3.66 254% 3900 4.73 258% 4157 5.85 263% 2875 7152 3554 3.09 249% 3638 3.37 248% 3796 3.94 248% 4084 5.12 251% 3325 8271 4085 4.68 249% 4159 5.00 248% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 675 3358 1236 0.21 361% 1484 0.34 369% 1876 0.63 383% 1025 5100 1662 0.54 356% 1824 0.69 359% 2160 1.07 367% 2706 1.92 382% 1375 6841 2133 1.15 355% 2251 1.33 355% 2498 1.76 360% 2989 2.80 368% 3405 3.92 376% 3772 5.13 384% 1725 8582 2613 2.12 354% 2720 2.37 356% 2903 2.84 356% 3309 4.01 363% 3697 5.33 367% 4042 6.70 372% 2075 10323 3099 3.54 353% 3195 3.86 355% 3357 4.44 356% 3676 5.67 358% 4017 7.14 363% 2425 12065 3589 5.51 352% 3675 5.90 354% 3828 6.61 356% 4087 7.92 356% 2775 13806 4083 8.12 352% 4160 8.56 353% XV7 (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP Nozzle Outlet Area: 0.402 ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 475 1182 1039 0.07 252% 1268 0.13 259% 850 2114 1489 0.19 239% 1672 0.28 245% 1962 0.48 252% 2469 0.98 263% 2945 1.63 262% 1225 3047 1978 0.41 236% 2135 0.55 239% 2392 0.82 244% 2801 1.40 252% 3158 2.06 257% 3504 2.82 262% 3846 3.69 265% 4172 4.65 263% 1600 3980 2489 0.80 236% 2621 0.97 236% 2852 1.32 240% 3228 2.04 246% 3545 2.81 252% 3819 3.60 254% 4093 4.48 257% 1975 4913 3012 1.40 236% 3125 1.61 236% 3330 2.03 237% 3676 2.89 242% 3972 3.79 246% 4240 4.74 251% 2350 5846 3542 2.26 237% 3641 2.50 236% 3823 2.99 236% 4143 4.01 239% 2725 6779 4077 3.43 237% 4164 3.71 236% Nozzle Outlet Area: 0.201 ft² Nozzle Outlet Area: 0.201 ft² 600 2985 1187 0.15 367% 1437 0.25 377% 1839 0.48 394% 925 4602 1616 0.40 362% 1768 0.51 364% 2100 0.80 374% 2659 1.49 390% 1250 6219 2089 0.86 360% 2202 1.00 362% 2432 1.31 366% 2918 2.12 375% 3342 3.03 384% 3717 4.02 393% 1575 7836 2570 1.61 359% 2672 1.80 361% 2843 2.14 361% 3225 3.01 369% 3613 4.05 374% 3962 5.17 379% 1900 9453 3059 2.71 358% 3148 2.95 360% 3304 3.38 362% 3596 4.27 363% 3920 5.39 369% 4246 6.64 373% 2225 11070 3552 4.24 357% 3631 4.53 359% 3776 5.07 361% 4017 6.03 361% 2550 12687 4048 6.28 356% 4119 6.61 358% 4251 7.25 360% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.201 ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP 475 2363 1132 0.11 356% 1384 0.19 363% 1770 0.36 376% 775 3856 1576 0.30 351% 1736 0.40 352% 2066 0.64 360% 2599 1.18 371% 1075 5348 2073 0.69 350% 2195 0.81 351% 2427 1.08 353% 2898 1.75 360% 3301 2.49 365% 3656 3.28 372% 3971 4.11 376% 1375 6841 2581 1.32 349% 2690 1.50 351% 2869 1.81 350% 3242 2.54 355% 3613 3.42 359% 3946 4.34 362% 4249 5.30 365% 1675 8333 3096 2.29 348% 3192 2.50 350% 3358 2.90 351% 3648 3.69 351% 3959 4.63 355% 1975 9826 3616 3.64 347% 3701 3.90 349% 3855 4.40 351% 4106 5.29 351% 2275 11318 4140 5.47 347% 4216 5.77 348% www.tcf.com 17

PerformanceData 165 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 1125 1155 955 0.16 183% 1155 0.29 188% 1825 1874 1287 0.36 180% 1456 0.55 182% 1726 0.95 186% 1955 1.39 190% 2167 1.87 195% 2525 2592 1651 0.71 179% 1792 0.97 180% 2034 1.51 182% 2236 2.05 184% 2418 2.61 186% 2745 3.84 190% 3048 5.18 196% 3332 6.62 203% 3225 3311 2035 1.29 179% 2152 1.62 180% 2363 2.27 180% 2552 2.96 182% 2720 3.65 183% 3016 5.06 186% 3282 6.56 188% 3925 4030 2431 2.14 179% 2526 2.52 179% 2714 3.33 180% 2882 4.12 181% 3040 4.96 182% 3320 6.64 183% 4625 4748 2833 3.35 178% 2914 3.77 179% 3077 4.71 180% 3231 5.66 180% 3374 6.59 181% 5325 5467 3240 4.96 178% 3309 5.43 179% 3450 6.46 179% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 2673 Windband Outlet Area: 3.26 ft 2 Wheel Dia.: 16.50" Max Class II RPM = 3487 Tip Speed FPM = 4.32 x RPM Nozzle Outlet Area: 0.974 ft² Nozzle Outlet Area: 0.974 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 725 744 892 0.09 179% 1130 0.19 184% 1275 1309 1221 0.19 175% 1397 0.32 176% 1696 0.61 180% 1963 0.98 183% 2196 1.39 188% 2568 2.20 199% 1825 1874 1605 0.40 174% 1742 0.56 175% 1988 0.91 176% 2210 1.31 178% 2408 1.75 180% 2784 2.79 183% 3115 3.96 188% 3388 5.08 193% 2375 2438 2018 0.77 173% 2122 0.95 174% 2327 1.37 175% 2516 1.81 176% 2696 2.31 177% 3019 3.40 179% 3313 4.62 181% 2925 3003 2443 1.34 173% 2526 1.54 174% 2696 2.02 175% 2861 2.53 175% 3016 3.07 176% 3310 4.27 177% 3475 3568 2875 2.15 173% 2943 2.38 173% 3084 2.90 174% 3229 3.49 175% 3367 4.10 175% 4025 4132 3310 3.26 173% 3369 3.52 173% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP Nozzle Outlet Area: 0.730 ft² 900 1233 1007 0.13 214% 1200 0.23 225% 1522 0.48 238% 1400 1918 1344 0.27 207% 1507 0.42 213% 1769 0.73 222% 1989 1.06 228% 2190 1.43 232% 1900 2603 1713 0.53 206% 1845 0.72 208% 2079 1.11 213% 2277 1.52 218% 2456 1.96 223% 2770 2.88 229% 3070 3.93 234% 2400 3288 2099 0.93 207% 2206 1.16 206% 2412 1.64 210% 2594 2.14 213% 2756 2.65 215% 3050 3.74 222% 3312 4.88 227% 2900 3973 2492 1.51 207% 2586 1.79 206% 2759 2.35 207% 2928 2.95 210% 3080 3.55 212% 3351 4.78 215% 3400 4658 2890 2.32 208% 2973 2.64 207% 3124 3.28 206% 3272 3.96 207% 3416 4.67 210% 3900 5342 3291 3.39 208% 3365 3.75 207% 525 539 890 0.07 174% 1139 0.15 174% 950 975 1201 0.14 176% 1400 0.24 175% 1718 0.49 174% 1992 0.79 173% 2225 1.11 177% 2604 1.79 188% 1375 1412 1562 0.28 177% 1724 0.41 176% 2003 0.71 175% 2240 1.04 174% 2448 1.40 174% 2832 2.25 173% 3164 3.19 176% 3442 4.13 181% 1800 1848 1953 0.52 177% 2083 0.68 177% 2322 1.02 176% 2536 1.40 175% 2731 1.83 175% 3072 2.72 174% 3378 3.73 174% 2225 2284 2360 0.89 178% 2463 1.06 177% 2671 1.48 177% 2861 1.91 176% 3036 2.36 175% 3359 3.39 175% 2650 2721 2774 1.42 178% 2861 1.62 177% 3036 2.07 177% 3209 2.59 177% 3368 3.09 176% 3075 3157 3193 2.14 178% 3268 2.37 177% 3418 2.86 177% MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP Nozzle Outlet Area: 0.974 ft² Nozzle Outlet Area: 0.730 ft² 1050 1438 955 0.16 215% 1161 0.29 229% 1700 2329 1284 0.37 206% 1454 0.56 213% 1730 0.96 223% 1963 1.40 231% 2172 1.85 235% 2350 3219 1654 0.76 205% 1786 1.01 207% 2030 1.54 213% 2236 2.07 218% 2423 2.65 224% 2755 3.85 232% 3056 5.13 236% 3000 4110 2042 1.39 205% 2149 1.70 205% 2357 2.36 209% 2546 3.03 212% 2715 3.70 215% 3020 5.13 222% 3295 6.64 228% 3650 5000 2438 2.33 205% 2532 2.70 205% 2703 3.46 206% 2874 4.27 209% 3033 5.10 212% 3313 6.72 215% 4300 5890 2839 3.64 206% 2922 4.08 205% 3073 4.96 205% 3217 5.87 206% 3363 6.83 208% 4950 6781 3244 5.40 206% 3318 5.90 205% 3455 6.90 205% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.730 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 675 925 1000 0.09 204% 1204 0.18 215% 1075 1473 1332 0.20 197% 1511 0.32 202% 1790 0.57 211% 2017 0.85 218% 2221 1.16 221% 1475 2021 1691 0.37 195% 1845 0.53 197% 2100 0.86 203% 2312 1.21 207% 2498 1.57 213% 2820 2.34 218% 3119 3.22 223% 1875 2568 2070 0.65 195% 2197 0.84 195% 2432 1.26 199% 2628 1.67 202% 2802 2.10 205% 3110 3.01 211% 3381 3.98 216% 2275 3116 2457 1.06 195% 2569 1.29 195% 2772 1.76 196% 2960 2.27 199% 3125 2.78 201% 3415 3.81 205% 2675 3664 2849 1.62 196% 2950 1.89 195% 3128 2.43 195% 3299 3.01 197% 3458 3.61 199% 3075 4212 3245 2.36 196% 3336 2.67 195% 18 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 875 1797 934 0.15 263% 1143 0.27 272% 1450 2977 1275 0.37 249% 1438 0.55 257% 1704 0.91 266% 1958 1.34 274% 2200 1.82 278% 2025 4158 1650 0.80 246% 1787 1.03 249% 2019 1.51 257% 2221 2.02 264% 2399 2.54 266% 2760 3.74 274% 3107 5.09 278% 3430 6.55 275% 2600 5339 2044 1.50 245% 2158 1.79 246% 2363 2.40 251% 2542 3.01 256% 2709 3.66 261% 2996 4.97 265% 3280 6.42 270% 3175 6520 2446 2.56 245% 2545 2.91 245% 2725 3.63 248% 2888 4.38 251% 3036 5.12 254% 3313 6.70 261% 3750 7700 2855 4.05 246% 2941 4.47 245% 3101 5.31 246% 3249 6.17 248% 3386 7.04 251% 4325 8881 3268 6.06 246% 3343 6.53 245% 3486 7.49 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.487 ft² Nozzle Outlet Area: 0.487 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 775 1591 973 0.12 261% 1170 0.22 270% 1548 0.48 274% 1225 2515 1309 0.27 251% 1467 0.40 258% 1726 0.69 266% 1972 1.03 273% 2216 1.43 278% 1675 3439 1672 0.54 248% 1806 0.72 251% 2034 1.08 259% 2229 1.47 264% 2407 1.88 267% 2766 2.83 274% 3120 3.96 277% 2125 4363 2051 0.98 248% 2165 1.20 249% 2366 1.64 253% 2543 2.10 258% 2707 2.59 262% 2991 3.60 266% 3275 4.73 271% 2575 5287 2438 1.63 248% 2537 1.88 248% 2716 2.41 250% 2877 2.95 253% 3024 3.51 256% 3296 4.69 263% 3025 6211 2831 2.53 248% 2917 2.83 248% 3078 3.43 249% 3225 4.05 251% 3361 4.69 253% 3475 7136 3228 3.73 249% 3304 4.07 248% 3448 4.75 248% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 825 3395 1130 0.26 360% 1354 0.42 368% 1711 0.77 384% 1175 4835 1446 0.57 355% 1605 0.75 360% 1921 1.20 368% 2188 1.68 376% 2424 2.19 384% 1525 6276 1798 1.11 356% 1912 1.31 355% 2163 1.81 362% 2409 2.39 366% 2629 3.00 371% 3016 4.29 381% 1875 7716 2156 1.91 354% 2258 2.18 356% 2448 2.71 357% 2655 3.36 362% 2860 4.07 365% 3224 5.53 370% 2225 9156 2518 3.06 353% 2613 3.39 356% 2769 3.99 355% 2937 4.67 358% 3111 5.43 361% 3454 7.11 366% 2575 10597 2884 4.60 353% 2970 5.00 355% 3116 5.72 356% 3249 6.41 355% 3396 7.22 358% 2925 12037 3253 6.61 352% 3331 7.07 354% 3470 7.93 356% XV7 (Extra High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP Nozzle Outlet Area: 0.487 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 575 1181 944 0.08 251% 1153 0.16 259% 950 1951 1279 0.19 240% 1452 0.30 247% 1723 0.53 254% 1972 0.81 261% 2215 1.14 264% 1325 2721 1642 0.39 237% 1792 0.53 240% 2038 0.83 247% 2241 1.15 252% 2423 1.49 254% 2779 2.27 261% 3127 3.19 265% 3455 4.24 261% 1700 3491 2020 0.70 236% 2151 0.88 237% 2372 1.25 242% 2562 1.64 246% 2734 2.04 250% 3025 2.88 253% 3307 3.81 257% 2075 4261 2407 1.16 236% 2522 1.38 236% 2724 1.83 239% 2899 2.28 242% 3056 2.75 244% 3343 3.74 251% 2450 5031 2802 1.82 236% 2903 2.07 236% 3086 2.59 237% 3250 3.12 239% 3397 3.66 241% 2825 5801 3200 2.69 237% 3291 2.98 236% 3457 3.57 236% Nozzle Outlet Area: 0.243 ft² Nozzle Outlet Area: 0.243 ft² 725 2984 1078 0.18 366% 1306 0.30 377% 1671 0.58 394% 1075 4424 1421 0.43 361% 1568 0.57 365% 1879 0.91 375% 2151 1.30 383% 2392 1.73 392% 1425 5864 1802 0.89 361% 1908 1.04 361% 2136 1.42 367% 2376 1.88 373% 2595 2.37 377% 2990 3.44 388% 1775 7305 2190 1.60 359% 2287 1.81 362% 2454 2.20 362% 2641 2.69 367% 2834 3.24 371% 3198 4.45 377% 2125 8745 2584 2.63 358% 2670 2.89 360% 2816 3.36 361% 2957 3.85 362% 3114 4.43 366% 3436 5.75 371% 2475 10185 2981 4.04 357% 3058 4.35 359% 3195 4.94 361% 3313 5.46 361% 3436 6.04 362% 2825 11626 3381 5.89 357% 3450 6.26 358% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.243 ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP 575 2366 1030 0.13 356% 1258 0.23 363% 1609 0.44 376% 875 3601 1356 0.31 351% 1515 0.42 354% 1827 0.70 361% 2090 1.01 367% 2320 1.34 375% 1175 4835 1727 0.64 351% 1842 0.77 350% 2083 1.09 356% 2321 1.46 359% 2535 1.85 362% 2912 2.70 370% 3237 3.59 376% 1475 6070 2105 1.16 350% 2211 1.34 351% 2391 1.67 351% 2585 2.08 355% 2778 2.54 358% 3133 3.51 362% 3445 4.54 366% 1775 7305 2489 1.91 349% 2584 2.14 350% 2742 2.54 351% 2894 2.97 351% 3055 3.45 354% 3376 4.54 358% 2075 8539 2877 2.95 348% 2963 3.22 350% 3113 3.73 351% 3239 4.19 351% 3369 4.68 351% 2375 9774 3268 4.33 347% 3346 4.65 349% 3486 5.24 351% www.tcf.com 19

PerformanceData 182 BAIFE LV (Low Velocity Nozzle) 1475 1234 925 0.34 176% 2950 2469 1249 0.91 170% 1663 2.04 174% 2025 3.37 177% 2357 4.92 178% 4425 3703 1687 2.16 169% 1984 3.66 171% 2268 5.35 173% 2526 7.13 174% 2774 9.06 176% 3009 11.11 177% 3237 13.33 178% 3456 15.69 178% 5900 4937 2159 4.39 171% 2386 6.27 168% 2609 8.32 171% 2830 10.54 172% 3035 12.80 173% 3229 15.13 174% 3421 17.60 175% 3607 20.15 175% 7375 6172 2644 7.93 172% 2831 10.23 169% 3011 12.63 169% 3188 15.17 170% 3367 17.86 171% 3542 20.66 172% 8850 7406 3136 13.08 172% 3297 15.86 170% 3449 18.64 169% 3598 21.53 168% 10325 8640 3633 20.18 172% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 2294 Max Class III RPM = 3701 Windband Outlet Area: 3.99 ft 2 Wheel Dia.: 18.25" Max Class II RPM = 2902 Tip Speed FPM = 4.78 x RPM Nozzle Outlet Area: 1.20 ft² Nozzle Outlet Area: 1.20 ft² 1200 1004 954 0.27 169% 2325 1946 1298 0.66 167% 1714 1.56 170% 2057 2.61 168% 2383 3.78 169% 3450 2887 1715 1.43 163% 2051 2.66 168% 2336 3.99 171% 2593 5.40 171% 2828 6.90 169% 3052 8.51 168% 3277 10.25 170% 3493 11.99 170% 4575 3828 2170 2.76 163% 2443 4.32 165% 2688 5.98 168% 2910 7.69 170% 3118 9.47 171% 3315 11.33 171% 3502 13.27 170% 3679 15.26 169% 5700 4770 2641 4.83 162% 2864 6.71 164% 3080 8.71 166% 3278 10.77 168% 3462 12.87 169% 3637 15.02 170% 6825 5711 3121 7.82 162% 3309 10.02 163% 3493 12.33 164% 3673 14.75 166% 7950 6653 3606 11.91 162% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.896 ft² 850 711 950 0.20 167% 1750 1464 1284 0.48 169% 1730 1.23 166% 2081 2.07 165% 2382 2.99 157% 2650 2218 1711 1.03 167% 2059 2.04 167% 2364 3.16 166% 2635 4.34 166% 2878 5.58 167% 3102 6.87 166% 3310 8.22 162% 3507 9.62 159% 3550 2971 2173 2.00 166% 2460 3.26 168% 2713 4.63 168% 2947 6.09 167% 3170 7.61 166% 3378 9.18 166% 3571 10.78 166% 4450 3724 2653 3.52 166% 2894 5.04 167% 3114 6.66 168% 3318 8.37 168% 3509 10.16 167% 3694 12.00 167% 5350 4477 3143 5.73 166% 3349 7.51 166% 3542 9.38 167% 6250 5230 3639 8.78 166% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.20 ft² Nozzle Outlet Area: 0.896 ft² 1075 1200 908 0.27 209% 2475 2762 1186 0.78 202% 1637 1.83 205% 2034 3.13 207% 2380 4.64 211% 2681 6.31 207% 3875 4325 1619 1.99 199% 1940 3.41 202% 2236 4.98 203% 2516 6.71 205% 2780 8.59 205% 3031 10.64 205% 3273 12.87 209% 3499 15.20 211% 5275 5887 2096 4.25 199% 2346 6.09 201% 2579 8.04 202% 2799 10.08 201% 3015 12.26 203% 3225 14.56 205% 3428 16.97 205% 3624 19.47 205% 6675 7450 2590 7.94 199% 2793 10.22 200% 2987 12.58 201% 3174 15.04 202% 3351 17.55 202% 3524 20.15 201% 3696 22.87 202% 8075 9012 3094 13.45 200% 3264 16.16 199% 3429 18.96 200% 3589 21.82 201% 9475 10575 3602 21.13 200% 1150 1283 961 0.27 203% 2225 2483 1308 0.69 203% 1722 1.57 202% 2075 2.58 204% 2388 3.74 199% 3300 3683 1733 1.52 199% 2065 2.74 203% 2348 4.04 203% 2605 5.42 202% 2849 6.88 203% 3077 8.43 204% 3289 10.08 202% 3500 11.83 199% 4375 4883 2191 2.96 199% 2464 4.52 202% 2707 6.16 203% 2928 7.84 203% 3134 9.59 202% 3329 11.41 202% 3519 13.30 202% 5450 6083 2665 5.21 198% 2892 7.09 200% 3105 9.09 202% 3301 11.12 203% 3485 13.19 203% 3659 15.30 203% 6525 7282 3148 8.48 198% 3342 10.69 199% 3526 12.99 200% 7600 8482 3637 12.97 198% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 0.896 ft² 800 893 944 0.19 186% 1650 1842 1278 0.48 193% 1727 1.21 192% 2075 2.02 187% 2393 2.95 197% 2500 2790 1697 1.05 189% 2053 2.04 195% 2364 3.13 196% 2630 4.26 192% 2864 5.44 186% 3090 6.71 186% 3308 8.06 190% 3517 9.48 194% 3350 3739 2153 2.04 188% 2445 3.29 191% 2704 4.64 194% 2943 6.06 196% 3170 7.54 196% 3377 9.05 194% 3563 10.58 191% 4200 4687 2629 3.60 188% 2871 5.11 189% 3097 6.72 191% 3304 8.40 193% 3500 10.15 195% 3689 11.94 196% 5050 5636 3114 5.88 188% 3320 7.64 188% 3516 9.50 190% 5900 6585 3604 9.01 188% Class III = Dark Blue section 20 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 875 1468 931 0.26 259% 2075 3482 1202 0.76 248% 1691 1.78 256% 2095 3.05 259% 2436 4.50 259% 2727 6.05 251% 3275 5495 1635 2.03 244% 1985 3.37 251% 2309 4.90 255% 2603 6.59 256% 2874 8.43 256% 3130 10.45 258% 3371 12.62 260% 3594 14.86 260% 4475 7508 2116 4.43 244% 2382 6.14 246% 2637 8.00 249% 2882 10.01 253% 3116 12.13 254% 3338 14.37 255% 3549 16.72 256% 5675 9522 2616 8.39 245% 2833 10.54 244% 3039 12.73 246% 3241 15.07 248% 3438 17.51 250% 3630 20.08 252% 6875 11535 3125 14.31 245% 3308 16.90 244% 3484 19.53 244% 3653 22.18 246% 8075 13549 3641 22.64 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.596 ft² Nozzle Outlet Area: 0.596 ft² 1050 1762 985 0.28 255% 1975 3314 1326 0.73 249% 1749 1.58 253% 2120 2.59 260% 2443 3.73 253% 2900 4866 1744 1.64 245% 2082 2.81 250% 2371 4.05 252% 2638 5.37 254% 2898 6.84 258% 3138 8.38 260% 3362 10.00 258% 3578 11.74 254% 3825 6418 2193 3.24 243% 2472 4.71 248% 2720 6.27 250% 2948 7.89 251% 3159 9.54 252% 3361 11.26 253% 3562 13.10 255% 4750 7970 2659 5.73 243% 2892 7.51 245% 3109 9.38 248% 3310 11.31 250% 3498 13.29 251% 3678 15.31 251% 5675 9522 3133 9.32 243% 3333 11.43 244% 3523 13.61 246% 6600 11074 3612 14.24 243% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 775 2592 1050 0.34 321% 1450 4849 1387 0.90 310% 1864 1.94 318% 2241 3.17 329% 2569 4.51 338% 2125 7107 1788 2.06 310% 2196 3.45 313% 2521 4.94 316% 2809 6.58 320% 3073 8.35 325% 3316 10.22 330% 3545 12.16 334% 2800 9365 2227 4.10 309% 2565 5.82 309% 2865 7.70 313% 3124 9.62 314% 3358 11.63 316% 3579 13.76 318% 3475 11622 2685 7.30 308% 2968 9.35 309% 3231 11.55 309% 3475 13.88 312% 3696 16.25 314% 4150 13880 3154 11.94 307% 3396 14.32 309% 3627 16.86 309% 4825 16137 3629 18.28 306% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.596 ft² 650 1091 926 0.17 242% 1450 2433 1252 0.47 241% 1701 1.14 245% 2071 1.94 243% 2402 2.86 249% 2708 3.90 266% 2250 3775 1679 1.09 240% 2041 2.03 241% 2341 3.04 244% 2610 4.13 245% 2859 5.30 243% 3095 6.55 242% 3320 7.88 243% 3535 9.29 245% 3050 5117 2147 2.21 238% 2447 3.44 241% 2705 4.73 241% 2938 6.06 242% 3154 7.45 244% 3358 8.90 245% 3551 10.40 245% 3850 6460 2635 4.00 238% 2882 5.51 240% 3113 7.10 241% 3321 8.72 241% 3513 10.37 241% 3695 12.06 242% 4650 7802 3134 6.66 237% 3342 8.43 239% 3543 10.30 240% 5450 9144 3639 10.34 237% Nozzle Outlet Area: 0.299 ft² Nozzle Outlet Area: 0.299 ft² 750 2508 1052 0.28 330% 1350 4515 1369 0.71 317% 1841 1.54 329% 2240 2.57 333% 1950 6522 1762 1.59 314% 2135 2.63 317% 2464 3.81 324% 2770 5.14 331% 3052 6.62 334% 3306 8.22 331% 3548 9.92 333% 2550 8528 2191 3.12 312% 2504 4.41 316% 2776 5.79 317% 3031 7.28 320% 3277 8.89 325% 3511 10.61 329% 3150 10535 2637 5.48 311% 2896 7.01 314% 3143 8.66 316% 3363 10.37 317% 3571 12.15 318% 3750 12542 3093 8.88 310% 3312 10.66 313% 3528 12.55 315% 4350 14548 3555 13.52 310% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.134 ft² 475 1589 961 0.17 319% 1025 3428 1256 0.46 307% 1738 1.08 315% 2138 1.87 320% 2486 2.77 329% 2795 3.78 341% 1575 5268 1668 1.11 306% 2038 1.92 306% 2364 2.84 311% 2658 3.88 314% 2930 5.02 316% 3187 6.26 319% 3428 7.57 322% 3655 8.96 326% 2125 7107 2120 2.29 304% 2431 3.36 308% 2693 4.45 306% 2940 5.63 308% 3178 6.91 311% 3401 8.26 313% 3613 9.71 314% 2675 8946 2594 4.21 304% 2847 5.50 306% 3088 6.87 308% 3298 8.24 307% 3496 9.66 306% 3692 11.17 307% 3225 10786 3079 7.05 304% 3290 8.55 305% 3499 10.15 306% 3698 11.81 308% 3775 12625 3570 10.99 304% Class III = Dark Blue section www.tcf.com 21

PerformanceData 200 BAIFE LV (Low Velocity Nozzle) 1775 1237 844 0.40 176% 3550 2474 1141 1.10 170% 1518 2.46 174% 1849 4.06 177% 2151 5.92 178% 5325 3711 1542 2.60 169% 1813 4.41 171% 2071 6.44 173% 2307 8.59 174% 2532 10.89 176% 2747 13.37 177% 2954 16.03 178% 3154 18.87 178% 7100 4948 1974 5.31 171% 2181 7.56 168% 2383 10.02 170% 2584 12.68 172% 2772 15.43 173% 2949 18.23 174% 3124 21.19 175% 3293 24.25 175% 8875 6185 2417 9.57 172% 2588 12.35 169% 2751 15.23 169% 2913 18.29 170% 3076 21.53 171% 3235 24.88 172% 10650 7422 2867 15.80 172% 3014 19.15 170% 3152 22.49 169% 3288 25.96 168% 12425 8659 3321 24.37 172% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 2093 Max Class III RPM = 3377 Windband Outlet Area: 4.80 ft 2 Wheel Dia.: 20.00" Max Class II RPM = 2648 Tip Speed FPM = 5.24 x RPM Nozzle Outlet Area: 1.43 ft² Nozzle Outlet Area: 1.43 ft² 1450 1010 872 0.32 169% 2800 1951 1187 0.80 167% 1566 1.89 171% 1879 3.14 168% 2175 4.55 169% 4150 2892 1567 1.72 163% 1873 3.20 168% 2133 4.80 171% 2367 6.49 170% 2582 8.31 169% 2786 10.24 168% 2990 12.32 170% 3188 14.42 170% 5500 3833 1982 3.32 163% 2231 5.20 165% 2454 7.19 168% 2657 9.25 170% 2847 11.40 171% 3026 13.63 171% 3196 15.94 170% 3358 18.34 169% 6850 4774 2411 5.81 162% 2614 8.06 164% 2812 10.48 166% 2992 12.94 168% 3160 15.46 169% 3320 18.06 170% 8200 5714 2849 9.40 162% 3020 12.04 163% 3189 14.83 164% 3353 17.73 166% 9550 6655 3292 14.33 162% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.08 ft² 1025 714 867 0.24 166% 2100 1463 1171 0.58 168% 1578 1.47 166% 1899 2.48 165% 2174 3.59 157% 3175 2213 1558 1.23 167% 1877 2.44 168% 2155 3.78 166% 2403 5.20 166% 2625 6.69 167% 2829 8.24 166% 3019 9.85 162% 3199 11.54 159% 4250 2962 1978 2.39 166% 2240 3.89 168% 2471 5.54 168% 2685 7.29 167% 2889 9.10 166% 3079 10.98 166% 3256 12.92 166% 5325 3711 2413 4.19 166% 2633 6.00 167% 2835 7.94 168% 3021 9.99 168% 3196 12.14 167% 3365 14.34 167% 6400 4460 2858 6.82 166% 3046 8.94 166% 3222 11.18 167% 7475 5209 3307 10.42 166% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.43 ft² Nozzle Outlet Area: 1.08 ft² 1300 1208 829 0.33 209% 3000 2788 1088 0.96 202% 1497 2.22 205% 1857 3.78 206% 2173 5.61 211% 2447 7.61 207% 4700 4368 1489 2.45 199% 1780 4.16 202% 2047 6.06 203% 2301 8.15 205% 2541 10.41 205% 2769 12.88 205% 2988 15.55 208% 3195 18.37 211% 6400 5948 1930 5.25 199% 2156 7.48 201% 2367 9.83 202% 2566 12.30 201% 2762 14.94 203% 2952 17.71 205% 3136 20.62 205% 3314 23.64 205% 8100 7528 2386 9.81 199% 2569 12.56 199% 2745 15.43 201% 2914 18.41 202% 3075 21.45 202% 3231 24.58 201% 9800 9108 2851 16.63 200% 3005 19.92 199% 3154 23.31 200% 3299 26.78 201% 11500 10688 3321 26.17 200% 1375 1278 876 0.32 203% 2650 2463 1188 0.81 203% 1567 1.87 202% 1890 3.08 204% 2177 4.46 198% 3925 3648 1569 1.78 199% 1874 3.23 203% 2134 4.79 203% 2369 6.44 202% 2594 8.19 203% 2802 10.03 204% 2997 12.02 202% 3191 14.12 199% 5200 4833 1981 3.46 199% 2232 5.32 202% 2455 7.26 203% 2658 9.27 203% 2847 11.36 202% 3026 13.53 202% 3201 15.78 202% 3371 18.10 203% 6475 6018 2408 6.09 198% 2617 8.32 200% 2813 10.70 202% 2993 13.11 203% 3161 15.56 203% 3322 18.09 203% 7750 7203 2843 9.88 198% 3021 12.49 199% 3192 15.26 200% 3354 18.11 202% 9025 8388 3283 15.09 198% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.08 ft² 950 883 859 0.23 185% 1975 1836 1163 0.58 193% 1574 1.44 192% 1892 2.42 187% 2183 3.54 197% 3000 2788 1547 1.26 189% 1872 2.45 195% 2156 3.75 195% 2399 5.11 191% 2613 6.53 186% 2819 8.06 186% 3018 9.67 190% 3209 11.38 194% 4025 3741 1966 2.45 188% 2232 3.95 191% 2468 5.58 194% 2686 7.29 196% 2893 9.06 196% 3082 10.88 194% 3252 12.72 191% 5050 4693 2401 4.34 188% 2622 6.15 189% 2828 8.08 191% 3017 10.10 193% 3196 12.21 195% 3368 14.36 196% 6075 5646 2845 7.09 188% 3034 9.21 188% 3212 11.45 190% 7100 6599 3295 10.88 188% Class III = Dark Blue section 22 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 1075 1501 852 0.32 260% 2500 3492 1099 0.92 248% 1544 2.15 256% 1913 3.68 260% 2224 5.42 259% 2489 7.28 250% 2729 9.29 244% 3925 5482 1490 2.42 244% 1809 4.03 251% 2105 5.87 254% 2374 7.90 256% 2621 10.10 256% 2855 12.53 258% 3075 15.12 259% 3279 17.83 260% 5350 7472 1923 5.26 244% 2167 7.31 246% 2401 9.54 249% 2625 11.94 253% 2839 14.48 254% 3042 17.16 255% 3235 19.98 256% 6775 9462 2374 9.91 245% 2573 12.48 244% 2762 15.10 246% 2947 17.88 248% 3128 20.82 251% 3304 23.89 253% 8200 11453 2834 16.87 245% 3002 19.96 244% 3163 23.08 244% 3318 26.24 246% 9625 13443 3298 26.59 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.716 ft² Nozzle Outlet Area: 0.716 ft² 1250 1746 897 0.33 255% 2350 3282 1203 0.86 249% 1591 1.88 253% 1931 3.09 260% 3450 4818 1580 1.93 245% 1890 3.32 250% 2155 4.79 252% 2400 6.38 254% 2639 8.13 258% 2859 9.98 260% 3064 11.92 258% 4550 6355 1985 3.80 244% 2241 5.55 248% 2469 7.41 250% 2677 9.33 251% 2871 11.30 252% 3057 13.36 253% 3242 15.57 255% 5650 7891 2405 6.70 243% 2620 8.83 245% 2819 11.05 249% 3003 13.35 250% 3176 15.71 251% 3341 18.12 251% 6750 9427 2833 10.90 243% 3017 13.40 244% 3192 16.01 246% 3357 18.67 249% 7850 10964 3266 16.64 243% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 925 2577 957 0.41 322% 1725 4805 1259 1.06 310% 1695 2.30 318% 2041 3.77 330% 2525 7033 1618 2.41 309% 1993 4.07 313% 2291 5.85 316% 2555 7.80 320% 2796 9.92 325% 3019 12.15 331% 3229 14.47 335% 3325 9262 2013 4.78 309% 2324 6.83 309% 2599 9.06 313% 2836 11.35 315% 3051 13.75 316% 3254 16.30 319% 4125 11490 2425 8.49 308% 2686 10.93 309% 2928 13.56 309% 3152 16.33 312% 3354 19.14 314% 4925 13719 2846 13.85 307% 3070 16.70 309% 3283 19.73 309% 5725 15947 3274 21.21 306% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.716 ft² 775 1082 844 0.21 242% 1725 2409 1137 0.55 241% 1547 1.35 244% 1887 2.31 243% 2190 3.41 249% 2471 4.67 269% 2675 3736 1521 1.28 240% 1853 2.40 241% 2128 3.61 244% 2375 4.91 245% 2603 6.30 243% 2819 7.80 242% 3025 9.39 243% 3222 11.08 245% 3625 5063 1941 2.58 238% 2218 4.06 241% 2454 5.58 241% 2668 7.17 242% 2866 8.83 244% 3053 10.56 245% 3230 12.34 244% 4575 6390 2382 4.68 238% 2609 6.47 240% 2821 8.36 241% 3011 10.28 241% 3188 12.25 241% 3355 14.26 242% 5525 7716 2831 7.76 237% 3023 9.87 239% 3208 12.10 240% 6475 9043 3287 12.05 237% Nozzle Outlet Area: 0.359 ft² Nozzle Outlet Area: 0.359 ft² 900 2507 959 0.34 329% 1625 4526 1251 0.86 317% 1681 1.85 328% 2045 3.09 333% 2350 6546 1612 1.93 313% 1952 3.18 317% 2251 4.59 324% 2530 6.20 330% 2787 7.97 334% 3018 9.89 331% 3239 11.95 333% 3075 8565 2006 3.78 312% 2291 5.34 316% 2538 7.00 317% 2771 8.80 320% 2994 10.73 325% 3208 12.81 329% 3800 10585 2416 6.66 311% 2652 8.52 314% 2876 10.49 316% 3076 12.55 317% 3266 14.70 318% 4525 12604 2835 10.81 310% 3034 12.96 313% 3230 15.23 315% 5250 14624 3259 16.46 310% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.359 ft² 575 1602 878 0.21 319% 1250 3482 1157 0.56 307% 1592 1.32 314% 1955 2.27 319% 2272 3.36 328% 2552 4.57 338% 1925 5362 1542 1.38 306% 1877 2.38 306% 2170 3.49 311% 2437 4.74 314% 2683 6.12 316% 2915 7.61 318% 3135 9.21 321% 3341 10.88 324% 2600 7242 1965 2.89 304% 2245 4.19 308% 2482 5.52 307% 2704 6.96 307% 2919 8.50 311% 3121 10.14 313% 3313 11.89 314% 3275 9123 2408 5.33 304% 2635 6.89 306% 2853 8.57 308% 3043 10.25 307% 3221 11.98 306% 3950 11003 2861 8.94 304% 3050 10.77 305% 3238 12.74 306% 4625 12883 3320 13.97 304% Class III = Dark Blue section www.tcf.com 23

PerformanceData 222 BAIFE LV (Low Velocity Nozzle) 2200 1239 759 0.50 176% 4400 2477 1026 1.36 169% 1365 3.05 174% 1662 5.02 177% 1934 7.33 178% 6600 3716 1388 3.23 169% 1631 5.47 171% 1863 7.99 173% 2074 10.64 174% 2277 13.51 176% 2470 16.57 177% 2656 19.87 178% 2835 23.37 178% 8800 4955 1776 6.59 171% 1962 9.38 168% 2144 12.44 170% 2325 15.74 172% 2493 19.13 173% 2652 22.60 174% 2809 26.26 175% 2961 30.05 175% 11000 6194 2175 11.89 172% 2329 15.34 169% 2476 18.92 169% 2621 22.70 170% 2767 26.71 171% 2910 30.86 172% 13200 7432 2581 19.64 172% 2713 23.79 170% 2836 27.91 169% 2959 32.24 168% 15400 8671 2990 30.31 172% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1881 Max Class III RPM = 3036 Windband Outlet Area: 5.94 ft 2 Wheel Dia.: 22.25" Max Class II RPM = 2381 Tip Speed FPM = 5.84 x RPM Nozzle Outlet Area: 1.78 ft² Nozzle Outlet Area: 1.78 ft² 1800 1014 785 0.40 170% 3475 1957 1068 0.99 167% 1409 2.34 171% 1690 3.90 168% 1956 5.65 170% 5150 2900 1412 2.15 163% 1686 3.98 168% 1919 5.95 171% 2130 8.07 171% 2323 10.32 169% 2506 12.71 168% 2689 15.28 170% 2866 17.87 170% 6825 3843 1785 4.13 163% 2009 6.47 165% 2209 8.93 168% 2391 11.49 170% 2562 14.16 171% 2723 16.92 171% 2876 19.80 170% 3021 22.77 169% 8500 4786 2173 7.24 162% 2355 10.04 164% 2532 13.03 166% 2694 16.09 168% 2844 19.21 169% 2988 22.43 170% 10175 5729 2567 11.72 162% 2721 15.00 163% 2872 18.46 164% 3019 22.05 166% 11850 6672 2966 17.86 162% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.33 ft² 1275 718 781 0.30 167% 2600 1464 1053 0.71 168% 1419 1.83 166% 1707 3.07 165% 1954 4.44 157% 3925 2210 1399 1.52 167% 1686 3.02 167% 1936 4.67 166% 2159 6.43 166% 2358 8.26 167% 2542 10.18 165% 2713 12.18 162% 2875 14.27 159% 5250 2956 1775 2.94 166% 2011 4.80 168% 2219 6.84 168% 2411 8.99 167% 2595 11.24 166% 2766 13.57 166% 2925 15.95 166% 6575 3702 2165 5.16 166% 2363 7.40 167% 2544 9.79 168% 2712 12.33 168% 2869 14.97 167% 3022 17.71 167% 7900 4448 2562 8.37 166% 2732 11.00 166% 2891 13.77 167% 9225 5194 2965 12.80 166% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.78 ft² Nozzle Outlet Area: 1.33 ft² 1600 1201 745 0.41 210% 3700 2778 976 1.18 202% 1345 2.74 205% 1669 4.67 207% 1953 6.93 212% 2199 9.39 206% 5800 4354 1336 3.01 200% 1597 5.12 202% 1838 7.46 203% 2067 10.05 205% 2283 12.85 205% 2488 15.90 205% 2686 19.22 208% 2872 22.71 211% 7900 5931 1730 6.44 199% 1934 9.20 201% 2124 12.10 202% 2304 15.16 201% 2480 18.41 203% 2651 21.83 204% 2817 25.45 205% 2977 29.17 205% 10000 7508 2140 12.06 199% 2305 15.46 200% 2464 19.02 201% 2615 22.67 202% 2760 26.43 202% 2901 30.31 201% 12100 9084 2557 20.45 200% 2695 24.49 199% 2830 28.70 200% 2960 32.97 201% 14200 10661 2978 32.16 200% 1700 1276 787 0.39 203% 3300 2477 1072 1.02 203% 1411 2.33 201% 1701 3.83 204% 1958 5.55 199% 4900 3679 1420 2.25 199% 1693 4.06 203% 1925 5.99 203% 2136 8.05 202% 2337 10.23 203% 2524 12.53 204% 2698 14.98 202% 2871 17.59 200% 6500 4880 1797 4.40 199% 2020 6.71 202% 2220 9.15 203% 2401 11.64 203% 2570 14.25 202% 2730 16.95 202% 2886 19.75 202% 8100 6081 2186 7.75 198% 2372 10.54 200% 2546 13.50 202% 2708 16.54 203% 2858 19.59 203% 3001 22.73 203% 9700 7282 2583 12.62 198% 2741 15.88 199% 2893 19.33 200% 11300 8483 2984 19.29 198% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.33 ft² 1175 882 772 0.28 185% 2450 1839 1047 0.72 193% 1416 1.79 192% 1701 3.00 187% 1963 4.39 197% 3725 2797 1394 1.56 189% 1686 3.04 195% 1941 4.66 196% 2159 6.35 192% 2351 8.11 186% 2536 10.00 186% 2714 12.00 190% 2886 14.12 194% 5000 3754 1773 3.06 188% 2011 4.93 191% 2223 6.94 194% 2418 9.06 196% 2604 11.26 196% 2774 13.52 194% 2927 15.80 191% 6275 4711 2166 5.43 188% 2364 7.67 189% 2548 10.07 191% 2718 12.58 193% 2878 15.19 195% 3033 17.87 196% 7550 5668 2568 8.88 188% 2736 11.51 188% 2896 14.29 190% 8825 6625 2974 13.63 188% Class III = Dark Blue section 24 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 1325 1495 765 0.39 259% 3100 3499 989 1.15 248% 1388 2.66 255% 1720 4.56 260% 1999 6.71 259% 2238 9.03 251% 2453 11.50 244% 4875 5502 1343 3.02 244% 1629 5.02 251% 1894 7.29 254% 2136 9.81 256% 2358 12.55 256% 2568 15.56 258% 2765 18.76 259% 2949 22.13 261% 6650 7506 1735 6.58 244% 1954 9.14 246% 2163 11.90 249% 2364 14.88 253% 2556 18.03 254% 2738 21.36 255% 2911 24.85 256% 8425 9509 2143 12.43 244% 2322 15.63 244% 2491 18.89 246% 2656 22.33 248% 2819 26.00 251% 2976 29.79 253% 10200 11512 2559 21.17 245% 2709 25.00 244% 2854 28.91 244% 2993 32.85 246% 11975 13516 2980 33.43 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 0.886 ft² Nozzle Outlet Area: 0.886 ft² 1550 1749 807 0.41 256% 2925 3301 1085 1.07 249% 1432 2.34 253% 1738 3.84 260% 2003 5.53 253% 4300 4853 1428 2.43 245% 1705 4.15 250% 1943 5.99 252% 2162 7.96 254% 2376 10.14 258% 2573 12.43 260% 2757 14.84 259% 2933 17.40 253% 5675 6405 1796 4.79 243% 2025 6.98 248% 2229 9.29 250% 2416 11.70 251% 2589 14.14 252% 2755 16.70 253% 2920 19.43 255% 7050 7957 2178 8.48 243% 2370 11.14 245% 2548 13.91 249% 2713 16.77 250% 2867 19.70 251% 3015 22.71 251% 8425 9509 2567 13.81 243% 2731 16.94 244% 2887 20.18 246% 3035 23.51 248% 9800 11061 2960 21.10 243% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 1150 2590 861 0.51 321% 2150 4842 1136 1.33 310% 1528 2.88 319% 1837 4.69 329% 2106 6.69 338% 3150 7095 1463 3.04 309% 1799 5.11 313% 2066 7.32 316% 2302 9.74 320% 2518 12.37 325% 2718 15.15 330% 2906 18.02 334% 4150 9347 1822 6.05 309% 2100 8.61 309% 2346 11.38 313% 2559 14.24 315% 2751 17.21 316% 2933 20.39 318% 5150 11599 2196 10.75 308% 2430 13.81 309% 2646 17.08 309% 2846 20.52 312% 3028 24.05 314% 6150 13851 2580 17.60 307% 2779 21.13 309% 2969 24.90 309% 7150 16104 2968 26.94 306% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.886 ft² 950 1072 758 0.25 243% 2125 2398 1019 0.68 241% 1389 1.67 244% 1695 2.85 243% 1968 4.21 250% 2221 5.76 270% 3300 3725 1363 1.57 240% 1662 2.96 241% 1910 4.45 244% 2132 6.05 244% 2338 7.78 243% 2533 9.63 243% 2718 11.60 243% 2895 13.68 245% 4475 5051 1741 3.17 238% 1990 5.00 241% 2203 6.88 241% 2396 8.85 242% 2573 10.88 244% 2742 13.03 245% 2902 15.25 245% 5650 6377 2137 5.76 238% 2341 7.96 240% 2533 10.32 241% 2704 12.69 241% 2862 15.10 241% 3013 17.61 242% 6825 7703 2541 9.56 237% 2713 12.16 239% 2879 14.91 240% 8000 9029 2950 14.84 237% Nozzle Outlet Area: 0.444 ft² Nozzle Outlet Area: 0.444 ft² 1125 2534 865 0.43 330% 2025 4561 1129 1.08 316% 1514 2.31 328% 1841 3.85 334% 2925 6588 1455 2.42 313% 1760 3.97 317% 2028 5.73 324% 2277 7.71 330% 2508 9.92 334% 2716 12.30 332% 2914 14.85 333% 3825 8615 1811 4.74 312% 2066 6.67 316% 2288 8.75 317% 2496 10.98 320% 2696 13.37 325% 2887 15.93 328% 4725 10642 2181 8.35 311% 2392 10.65 314% 2593 13.11 316% 2772 15.66 317% 2942 18.33 318% 5625 12669 2559 13.55 310% 2737 16.21 313% 2913 19.05 315% 6525 14696 2941 20.62 310% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.444 ft² 700 1577 787 0.25 318% 1525 3435 1031 0.68 307% 1426 1.61 315% 1754 2.78 320% 2039 4.12 328% 2292 5.62 340% 2350 5293 1372 1.66 306% 1675 2.87 306% 1942 4.24 311% 2183 5.79 314% 2405 7.49 316% 2615 9.32 318% 2813 11.28 321% 2999 13.35 325% 3175 7151 1746 3.45 304% 2001 5.05 308% 2215 6.68 306% 2417 8.44 307% 2611 10.33 311% 2794 12.36 313% 2968 14.52 314% 4000 9009 2139 6.36 304% 2346 8.28 306% 2543 10.33 308% 2715 12.38 307% 2876 14.50 306% 3036 16.75 307% 4825 10867 2541 10.67 304% 2713 12.92 305% 2884 15.32 307% 5650 12725 2947 16.65 304% Class III = Dark Blue section www.tcf.com 25

PerformanceData 245 BAIFE LV (Low Velocity Nozzle) 2675 1242 690 0.61 176% 5325 2472 931 1.64 170% 1239 3.69 174% 1509 6.08 177% 1756 8.88 178% 7975 3702 1257 3.89 169% 1478 6.59 171% 1689 9.63 173% 1882 12.86 174% 2066 16.31 176% 2242 20.03 177% 2411 24.02 178% 2574 28.27 178% 10625 4933 1607 7.90 171% 1777 11.29 168% 1942 14.96 170% 2107 18.96 172% 2260 23.05 173% 2405 27.25 174% 2548 31.69 175% 2687 36.30 176% 13275 6163 1967 14.24 172% 2107 18.39 169% 2241 22.71 169% 2373 27.27 170% 2507 32.15 171% 2637 37.16 172% 15925 7393 2333 23.49 172% 2453 28.48 170% 2566 33.48 169% 2677 38.66 168% 18575 8623 2701 36.17 172% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1708 Max Class III RPM = 2757 Windband Outlet Area: 7.20 ft 2 Wheel Dia.: 24.50" Max Class II RPM = 2162 Tip Speed FPM = 6.41 x RPM Nozzle Outlet Area: 2.15 ft² Nozzle Outlet Area: 2.15 ft² 2175 1010 712 0.48 170% 4200 1950 968 1.20 167% 1278 2.83 171% 1533 4.71 168% 1776 6.83 170% 6225 2890 1279 2.58 163% 1529 4.81 168% 1741 7.19 171% 1932 9.74 170% 2107 12.45 169% 2274 15.36 168% 2441 18.48 170% 2602 21.62 169% 8250 3830 1617 4.98 163% 1821 7.81 166% 2003 10.78 168% 2168 13.87 170% 2323 17.08 171% 2470 20.44 171% 2609 23.92 170% 2741 27.52 169% 10275 4770 1968 8.71 162% 2134 12.10 164% 2295 15.72 166% 2442 19.41 168% 2579 23.19 169% 2710 27.09 170% 12300 5710 2325 14.10 162% 2465 18.06 163% 2602 22.23 164% 2736 26.58 166% 14325 6650 2686 21.47 162% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² 1550 720 710 0.36 167% 3150 1462 956 0.87 169% 1288 2.21 166% 1550 3.72 165% 1774 5.38 157% 4750 2205 1269 1.84 167% 1530 3.65 168% 1757 5.65 166% 1959 7.77 166% 2141 10.00 167% 2308 12.33 166% 2463 14.75 162% 2610 17.27 158% 6350 2948 1609 3.55 166% 1823 5.79 168% 2012 8.25 168% 2188 10.88 167% 2355 13.60 166% 2510 16.41 166% 2654 19.29 166% 7950 3691 1961 6.21 166% 2141 8.91 167% 2307 11.82 169% 2459 14.88 168% 2602 18.08 167% 2741 21.39 167% 9550 4434 2321 10.08 166% 2475 13.24 166% 2620 16.60 167% 2756 20.09 168% 11150 5176 2684 15.37 166% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 2.15 ft² Nozzle Outlet Area: 1.62 ft² 1950 1207 676 0.50 207% 4500 2786 888 1.44 202% 1222 3.33 205% 1516 5.68 207% 1774 8.41 212% 1998 11.42 208% 7050 4365 1215 3.67 199% 1453 6.25 202% 1671 9.09 203% 1878 12.22 205% 2074 15.62 204% 2260 19.31 205% 2439 23.32 208% 2608 27.56 211% 9600 5944 1575 7.87 199% 1759 11.20 201% 1932 14.75 202% 2095 18.46 201% 2254 22.39 202% 2409 26.54 204% 2559 30.90 205% 2705 35.46 205% 12150 7523 1947 14.71 199% 2097 18.85 200% 2241 23.16 201% 2378 27.60 202% 2509 32.14 202% 2637 36.86 201% 14700 9102 2327 24.94 200% 2452 29.86 199% 2574 34.95 200% 2692 40.14 201% 17250 10681 2710 39.23 200% 2050 1269 714 0.48 203% 3975 2461 969 1.22 203% 1279 2.81 202% 1543 4.62 204% 1777 6.69 198% 5900 3653 1283 2.69 199% 1532 4.88 203% 1743 7.20 202% 1935 9.68 202% 2118 12.30 203% 2288 15.08 204% 2447 18.05 202% 2605 21.20 199% 7825 4845 1621 5.23 199% 1826 8.03 202% 2008 10.96 203% 2173 13.97 203% 2327 17.11 202% 2473 20.37 202% 2615 23.75 202% 2753 27.22 203% 9750 6037 1972 9.22 198% 2142 12.58 200% 2301 16.15 202% 2448 19.79 203% 2585 23.47 203% 2716 27.28 203% 11675 7229 2329 14.99 198% 2474 18.92 199% 2613 23.08 200% 2745 27.38 202% 13600 8421 2691 22.91 198% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² 1425 882 702 0.35 186% 2975 1842 952 0.87 193% 1286 2.17 192% 1545 3.64 187% 1783 5.33 197% 4525 2802 1268 1.91 189% 1533 3.70 195% 1764 5.66 196% 1962 7.71 192% 2136 9.85 186% 2304 12.15 186% 2466 14.58 190% 2622 17.15 194% 6075 3762 1613 3.73 188% 1829 6.00 191% 2021 8.44 194% 2198 11.01 196% 2367 13.69 196% 2521 16.43 194% 2660 19.20 191% 7625 4721 1971 6.62 188% 2151 9.35 189% 2318 12.27 191% 2472 15.31 193% 2617 18.48 195% 2757 21.73 196% 9175 5681 2337 10.83 188% 2490 14.04 188% 2635 17.41 190% 10725 6641 2707 16.63 188% Class III = Dark Blue section 26 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 1600 1490 695 0.48 261% 3750 3492 897 1.38 248% 1260 3.22 256% 1561 5.52 259% 1815 8.13 259% 2032 10.93 251% 2227 13.92 243% 5900 5493 1218 3.65 244% 1478 6.07 251% 1719 8.82 254% 1939 11.88 256% 2140 15.18 256% 2331 18.82 258% 2511 22.73 260% 2677 26.78 260% 8050 7495 1574 7.96 244% 1772 11.03 246% 1962 14.37 249% 2145 17.99 253% 2320 21.81 254% 2485 25.83 255% 2643 30.09 256% 10200 9497 1944 15.02 245% 2106 18.87 244% 2260 22.83 246% 2410 27.00 248% 2558 31.43 251% 2701 36.03 253% 12350 11499 2321 25.57 245% 2458 30.23 244% 2589 34.93 244% 2715 39.68 245% 14500 13501 2703 40.38 245% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.07 ft² Nozzle Outlet Area: 1.07 ft² 1900 1769 735 0.50 255% 3575 3329 991 1.32 249% 1304 2.86 253% 1581 4.70 260% 1821 6.75 254% 5250 4888 1304 3.00 245% 1555 5.10 250% 1770 7.34 252% 1968 9.74 254% 2161 12.38 258% 2340 15.17 260% 2506 18.09 259% 2666 21.21 253% 6925 6448 1640 5.90 243% 1847 8.57 248% 2032 11.40 250% 2200 14.31 251% 2357 17.29 252% 2508 20.42 253% 2657 23.74 255% 8600 8007 1989 10.45 243% 2162 13.69 245% 2323 17.06 248% 2472 20.54 250% 2612 24.12 250% 2746 27.80 251% 10275 9567 2344 17.02 243% 2492 20.83 244% 2633 24.78 246% 11950 11127 2702 25.98 243% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 1400 2597 783 0.62 321% 2600 4824 1030 1.61 310% 1386 3.47 319% 1668 5.68 330% 1912 8.09 338% 3800 7050 1324 3.64 309% 1629 6.13 313% 1872 8.80 316% 2088 11.75 320% 2284 14.92 325% 2466 18.28 331% 2637 21.76 335% 5000 9276 1646 7.21 309% 1900 10.30 309% 2124 13.65 313% 2317 17.08 314% 2493 20.70 316% 2658 24.53 319% 6200 11503 1982 12.79 308% 2195 16.46 309% 2392 20.40 309% 2575 24.57 312% 2740 28.80 314% 7400 13729 2326 20.87 307% 2508 25.13 309% 2682 29.68 309% 8600 15955 2675 31.92 306% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.07 ft² 1175 1094 690 0.31 242% 2600 2421 930 0.84 241% 1265 2.04 245% 1541 3.47 242% 1788 5.13 248% 2017 7.01 267% 4025 3748 1244 1.93 240% 1514 3.62 241% 1739 5.44 244% 1940 7.39 245% 2126 9.48 243% 2302 11.73 242% 2470 14.12 243% 2631 16.66 245% 5450 5074 1587 3.89 238% 1813 6.11 241% 2006 8.41 241% 2180 10.79 242% 2341 13.27 244% 2494 15.88 245% 2639 18.58 245% 6875 6401 1947 7.05 238% 2132 9.73 240% 2305 12.58 241% 2460 15.46 241% 2604 18.41 241% 2741 21.46 242% 8300 7728 2314 11.69 237% 2470 14.85 239% 2621 18.20 240% 9725 9055 2685 18.11 237% Nozzle Outlet Area: 0.539 ft² Nozzle Outlet Area: 0.539 ft² 1350 2505 783 0.51 330% 2450 4545 1024 1.30 316% 1374 2.79 328% 1671 4.66 333% 3550 6586 1323 2.94 314% 1599 4.82 317% 1842 6.95 324% 2069 9.37 330% 2278 12.03 334% 2467 14.93 332% 2646 18.00 332% 4650 8627 1648 5.79 312% 1880 8.14 316% 2081 10.66 317% 2269 13.36 320% 2451 16.27 325% 2624 19.38 328% 5750 10668 1987 10.22 311% 2178 13.02 314% 2360 16.01 316% 2523 19.12 317% 2677 22.37 318% 6850 12709 2333 16.62 310% 2494 19.87 313% 2653 23.31 315% 7950 14750 2683 25.34 310% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.539 ft² 850 1577 715 0.31 319% 1850 3432 937 0.82 307% 1295 1.95 314% 1593 3.37 320% 1852 5.00 329% 2082 6.82 340% 2850 5288 1246 2.01 306% 1522 3.49 306% 1763 5.14 311% 1982 7.01 314% 2184 9.08 316% 2375 11.31 319% 2555 13.69 322% 2724 16.19 326% 3850 7143 1586 4.19 304% 1817 6.12 308% 2012 8.10 307% 2195 10.23 307% 2371 12.52 311% 2538 14.99 313% 2695 17.60 314% 4850 8998 1943 7.72 304% 2130 10.04 306% 2309 12.52 308% 2465 15.00 307% 2612 17.58 306% 2757 20.30 307% 5850 10853 2307 12.93 304% 2464 15.67 305% 2619 18.57 307% 6850 12709 2676 20.18 304% Class III = Dark Blue section www.tcf.com 27

PerformanceData 270 BAIFE LV (Low Velocity Nozzle) 2700 1032 616 0.58 172% 6150 2351 840 1.71 168% 1120 3.89 162% 1379 6.55 170% 1617 9.72 186% 1821 13.07 195% 9600 3670 1131 4.15 168% 1366 7.40 167% 1548 10.66 164% 1722 14.22 162% 1892 18.07 164% 2056 22.24 168% 2219 26.88 173% 2375 31.79 180% 13050 4989 1457 8.63 168% 1656 13.06 168% 1818 17.40 167% 1956 21.74 166% 2089 26.24 164% 2218 30.95 162% 2345 35.88 162% 2471 41.03 163% 16500 6307 1800 15.95 169% 1947 21.19 167% 2110 27.00 168% 2242 32.53 168% 2355 37.92 167% 2463 43.42 166% 19950 7626 2149 26.80 169% 2268 32.95 168% 2395 39.56 167% 2531 46.63 168% 23400 8945 2502 41.94 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1558 Max Class III RPM = 2549 Windband Outlet Area: 8.73 ft 2 Wheel Dia.: 27.00" Max Class II RPM = 1999 Tip Speed FPM = 7.07 x RPM Nozzle Outlet Area: 2.62 ft² Nozzle Outlet Area: 2.62 ft² 1800 688 639 0.47 215% 4400 1682 815 1.02 163% 1115 2.71 159% 1410 5.18 177% 1713 8.70 249% 1947 12.17 286% 2138 15.54 306% 7000 2676 1105 2.43 163% 1347 4.65 163% 1536 7.10 161% 1719 9.97 159% 1903 13.33 158% 2090 17.24 153% 2275 21.67 181% 2471 27.02 213% 9600 3670 1443 5.20 164% 1615 7.80 163% 1799 10.99 163% 1943 14.16 163% 2078 17.56 161% 2214 21.33 160% 2347 25.38 159% 2480 29.78 158% 12200 4664 1796 9.80 164% 1923 12.78 163% 2064 16.30 163% 2214 20.35 163% 2341 24.38 163% 2453 28.44 163% 14800 5657 2155 16.72 164% 2258 20.18 164% 2365 23.97 163% 2481 28.24 163% 17400 6651 2517 26.44 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² 1275 487 644 0.37 202% 3350 1281 823 0.79 162% 1138 2.20 151% 1426 4.17 154% 1705 6.82 205% 1945 9.74 242% 2141 12.60 260% 2315 15.51 271% 5425 2074 1104 1.80 165% 1375 3.71 161% 1576 5.79 157% 1764 8.19 153% 1946 10.94 150% 2125 14.04 151% 2299 17.49 152% 2471 21.36 166% 7500 2867 1436 3.78 167% 1642 6.08 164% 1841 8.81 162% 1996 11.54 160% 2139 14.44 157% 2279 17.60 155% 2414 20.99 153% 2546 24.61 151% 9575 3660 1785 7.08 168% 1939 9.71 165% 2106 12.85 164% 2271 16.38 163% 2405 19.80 161% 2525 23.29 160% 11650 4453 2142 12.05 169% 2268 15.10 167% 2396 18.47 165% 2534 22.32 164% 13725 5247 2503 19.04 169% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 2.62 ft² Nozzle Outlet Area: 1.96 ft² 3525 1796 662 0.79 184% 6525 3324 919 2.28 185% 1172 4.47 182% 1421 7.27 193% 9525 4852 1215 5.31 191% 1418 8.31 181% 1594 11.53 181% 1762 15.00 183% 1934 19.00 188% 2102 23.37 194% 2264 28.05 200% 12525 6381 1521 10.35 192% 1716 14.89 188% 1851 18.49 181% 1988 22.68 180% 2120 27.02 181% 2247 31.50 182% 2375 36.34 184% 2506 41.64 187% 15525 7909 1841 18.22 193% 2011 24.05 191% 2150 29.24 187% 2257 33.60 182% 2367 38.52 180% 2477 43.82 180% 18525 9437 2167 29.54 194% 2306 36.23 191% 2449 43.38 190% 21525 10965 2497 45.00 194% 2975 1516 682 0.62 182% 5250 2674 940 1.58 183% 1190 3.28 181% 1433 5.50 193% 7525 3833 1237 3.50 191% 1432 5.67 180% 1607 8.10 180% 1777 10.84 183% 1947 13.98 189% 2115 17.53 195% 9800 4992 1534 6.51 193% 1721 9.65 186% 1859 12.40 180% 1996 15.52 180% 2127 18.78 180% 2257 22.30 182% 2388 26.15 185% 2519 30.33 188% 12075 6151 1846 11.15 194% 2020 15.35 191% 2145 18.73 184% 2257 22.11 180% 2370 25.89 180% 2480 29.79 180% 14350 7310 2164 17.74 195% 2311 22.63 192% 2448 27.51 189% 2547 31.35 184% 16625 8469 2486 26.66 196% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² 2250 1146 688 0.48 174% 4075 2076 941 1.18 172% 1210 2.62 173% 1455 4.48 183% 5900 3006 1238 2.58 181% 1454 4.44 170% 1640 6.51 171% 1814 8.82 174% 1984 11.46 179% 2149 14.40 184% 2317 17.77 190% 7725 3935 1530 4.72 182% 1740 7.37 175% 1893 9.77 171% 2039 12.44 171% 2175 15.20 171% 2309 18.21 173% 2441 21.47 175% 9550 4865 1836 7.98 183% 2039 11.61 180% 2176 14.47 174% 2300 17.42 171% 2422 20.68 170% 2538 24.01 171% 11375 5795 2150 12.62 184% 2327 16.92 181% 2479 21.04 179% 13200 6724 2468 18.89 184% Class III = Dark Blue section 28 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 2375 1813 650 0.62 225% 4925 3760 851 1.74 213% 1168 3.87 230% 1437 6.51 224% 1668 9.36 223% 7475 5706 1151 4.38 217% 1366 7.08 215% 1577 10.15 224% 1782 13.72 231% 1967 17.63 227% 2138 21.69 224% 2300 25.89 223% 2451 30.22 222% 10025 7653 1474 9.24 220% 1642 12.66 214% 1800 16.30 214% 1957 20.21 219% 2116 24.51 224% 2273 29.20 229% 2419 34.13 231% 12575 9599 1807 17.03 222% 1947 21.21 217% 2077 25.60 214% 2204 30.19 213% 2329 34.88 216% 2454 39.85 219% 15125 11546 2147 28.57 223% 2266 33.52 219% 2379 38.65 216% 2486 43.93 214% 17675 13492 2490 44.56 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.31 ft² Nozzle Outlet Area: 1.31 ft² 2025 1546 655 0.49 225% 4100 3130 864 1.24 214% 1175 2.91 230% 1438 5.02 222% 1662 7.34 221% 6175 4714 1165 2.99 219% 1377 5.00 217% 1589 7.42 226% 1789 10.25 230% 1970 13.35 225% 2138 16.59 223% 2294 19.93 221% 2441 23.46 220% 8250 6298 1488 6.14 222% 1654 8.68 215% 1813 11.44 216% 1969 14.44 220% 2129 17.83 226% 2282 21.51 230% 2426 25.47 230% 10325 7882 1822 11.19 224% 1961 14.27 218% 2090 17.53 215% 2216 20.94 215% 2341 24.52 218% 2467 28.40 221% 12400 9466 2162 18.62 225% 2280 22.22 221% 2392 26.00 217% 2498 29.91 215% 14475 11050 2504 28.85 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 1625 2489 700 0.62 309% 3175 4862 930 1.76 308% 1259 3.77 306% 1513 6.04 315% 1732 8.57 323% 4725 7236 1203 4.12 318% 1487 6.90 305% 1712 9.89 304% 1907 13.01 307% 2083 16.30 310% 2246 19.77 314% 2399 23.44 319% 2543 27.27 323% 6275 9609 1502 8.28 320% 1741 11.92 312% 1947 15.61 306% 2126 19.50 304% 2288 23.53 305% 2437 27.63 306% 7825 11983 1815 14.86 320% 2018 19.31 317% 2201 23.89 311% 2368 28.47 307% 2519 33.18 305% 9375 14357 2136 24.45 319% 2310 29.66 320% 2473 35.13 316% 10925 16730 2461 37.63 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.31 ft² 1525 1164 650 0.38 213% 3250 2481 863 0.94 205% 1183 2.33 220% 1441 4.07 213% 1660 5.98 211% 1856 8.15 213% 4975 3798 1162 2.22 208% 1393 3.94 207% 1608 5.97 214% 1808 8.31 220% 1986 10.89 216% 2150 13.61 213% 2302 16.40 212% 2446 19.34 211% 6700 5115 1485 4.54 211% 1671 6.73 205% 1840 9.09 206% 2001 11.64 210% 2161 14.49 214% 2314 17.56 219% 2455 20.79 219% 8425 6431 1818 8.24 213% 1977 10.93 208% 2119 13.75 205% 2255 16.72 205% 2384 19.76 207% 2512 23.04 210% 10150 7748 2158 13.70 214% 2296 16.90 210% 2422 20.21 207% 2538 23.60 205% 11875 9065 2502 21.26 215% Nozzle Outlet Area: 0.653 ft² Nozzle Outlet Area: 0.653 ft² 1450 2221 689 0.49 318% 2900 4441 910 1.34 316% 1242 2.97 313% 1504 4.88 322% 1731 7.06 332% 4350 6662 1185 3.17 325% 1462 5.36 313% 1688 7.77 311% 1887 10.37 314% 2067 13.13 318% 2236 16.11 322% 2395 19.27 327% 2544 22.57 331% 5800 8882 1489 6.47 325% 1716 9.27 320% 1918 12.20 313% 2097 15.31 311% 2260 18.62 312% 2412 22.04 313% 7250 11103 1807 11.72 324% 1996 15.09 324% 2171 18.66 319% 2334 22.30 314% 2486 26.10 312% 8700 13323 2133 19.42 324% 2293 23.33 326% 2446 27.50 323% 10150 15544 2462 30.01 323% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.653 ft² 1100 1685 656 0.35 305% 2400 3675 890 1.04 305% 1214 2.36 300% 1458 3.84 305% 1669 5.51 313% 1854 7.30 318% 3700 5666 1173 2.53 315% 1451 4.39 302% 1671 6.38 299% 1860 8.50 300% 2028 10.70 302% 2182 12.99 304% 2328 15.44 307% 2466 18.01 310% 5000 7657 1483 5.23 316% 1717 7.70 310% 1917 10.22 303% 2092 12.83 300% 2249 15.58 299% 2393 18.41 299% 2527 21.28 300% 6300 9648 1808 9.58 316% 2006 12.61 315% 2183 15.77 309% 2345 18.96 305% 2493 22.18 302% 7600 11639 2141 16.02 315% 2311 19.60 316% 2468 23.33 314% 8900 13629 2479 24.96 315% Class III = Dark Blue section www.tcf.com 29

PerformanceData 300 BAIFE LV (Low Velocity Nozzle) 3325 1029 554 0.71 171% 7575 2345 755 2.11 168% 1007 4.78 162% 1241 8.08 171% 1455 11.98 186% 1639 16.13 196% 11825 3661 1016 5.10 168% 1227 9.08 167% 1392 13.12 164% 1549 17.51 162% 1702 22.25 164% 1850 27.42 168% 1997 33.14 173% 2137 39.17 180% 16075 4977 1309 10.60 168% 1488 16.04 168% 1634 21.40 167% 1759 26.77 166% 1879 32.33 164% 1994 38.07 162% 2109 44.17 162% 2222 50.49 163% 20325 6293 1616 19.55 169% 1749 26.02 167% 1896 33.18 168% 2015 39.99 168% 2116 46.59 167% 2214 53.40 166% 24575 7608 1930 32.88 169% 2038 40.50 168% 2152 48.61 167% 2275 57.34 168% 28825 8924 2247 51.45 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1402 Max Class III RPM = 2294 Windband Outlet Area: 10.77 ft 2 Wheel Dia.: 30.00" Max Class II RPM = 1799 Tip Speed FPM = 7.85 x RPM Nozzle Outlet Area: 3.23 ft² Nozzle Outlet Area: 3.23 ft² 2225 689 575 0.58 215% 5425 1680 733 1.26 163% 1003 3.34 159% 1269 6.39 178% 1542 10.74 250% 1752 15.02 286% 1924 19.17 307% 8625 2670 993 2.98 163% 1211 5.72 163% 1381 8.74 161% 1546 12.28 159% 1712 16.44 158% 1881 21.27 154% 2048 26.75 182% 2225 33.38 214% 11825 3661 1296 6.38 164% 1451 9.58 163% 1617 13.52 163% 1747 17.44 163% 1869 21.64 161% 1991 26.27 160% 2111 31.28 159% 2231 36.71 158% 15025 4652 1613 12.03 164% 1728 15.70 163% 1854 20.01 163% 1990 25.03 163% 2104 29.99 163% 2205 34.99 163% 18225 5642 1934 20.47 164% 2027 24.73 163% 2124 29.41 163% 2229 34.69 163% 21425 6633 2259 32.37 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.42 ft² 1575 488 580 0.46 203% 4125 1277 740 0.97 162% 1024 2.71 151% 1283 5.14 153% 1535 8.42 206% 1750 12.01 243% 1926 15.52 260% 2083 19.12 271% 6675 2067 991 2.20 165% 1235 4.56 161% 1417 7.13 157% 1586 10.08 153% 1751 13.49 150% 1912 17.31 151% 2069 21.57 153% 2225 26.38 168% 9225 2856 1288 4.62 167% 1475 7.47 164% 1654 10.83 162% 1793 14.17 160% 1923 17.77 157% 2049 21.67 155% 2170 25.82 153% 2290 30.32 151% 11775 3646 1601 8.65 168% 1740 11.88 165% 1891 15.76 164% 2039 20.08 163% 2160 24.31 161% 2268 28.60 160% 14325 4435 1920 14.70 169% 2034 18.46 167% 2150 22.62 165% 2275 27.37 164% 16875 5224 2243 23.21 169% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 3.23 ft² Nozzle Outlet Area: 2.42 ft² 4350 1795 595 0.97 183% 8050 3321 826 2.80 185% 1055 5.52 182% 1278 8.96 192% 11750 4847 1093 6.54 191% 1275 10.22 180% 1435 14.24 181% 1586 18.52 183% 1740 23.43 188% 1892 28.86 194% 2037 34.59 199% 15450 6374 1368 12.75 192% 1544 18.36 188% 1665 22.79 181% 1788 27.94 180% 1907 33.30 181% 2022 38.86 182% 2137 44.82 184% 2255 51.36 187% 19150 7900 1655 22.41 193% 1808 29.60 191% 1934 36.05 187% 2030 41.40 181% 2130 47.53 180% 2228 54.00 180% 22850 9427 1949 36.39 194% 2074 44.64 191% 2202 53.41 190% 26550 10953 2246 55.47 194% 3675 1516 614 0.76 182% 6475 2671 845 1.94 183% 1070 4.03 181% 1289 6.77 192% 9275 3826 1112 4.31 191% 1288 6.99 180% 1445 9.98 180% 1598 13.35 183% 1752 17.25 189% 1903 21.61 195% 12075 4981 1379 8.02 193% 1547 11.87 186% 1671 15.26 180% 1795 19.12 180% 1912 23.10 180% 2030 27.47 182% 2148 32.22 185% 2266 37.37 188% 14875 6137 1658 13.68 194% 1815 18.86 191% 1928 23.04 184% 2028 27.16 180% 2130 31.84 180% 2229 36.63 180% 17675 7292 1944 21.78 195% 2076 27.79 192% 2199 33.77 189% 2288 38.49 184% 20475 8447 2232 32.68 196% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.42 ft² 2775 1145 619 0.59 174% 5025 2073 847 1.45 172% 1089 3.24 173% 1309 5.53 183% 7275 3001 1114 3.18 181% 1307 5.46 170% 1475 8.02 171% 1632 10.88 174% 1785 14.13 179% 1934 17.77 184% 2085 21.92 190% 9525 3929 1375 5.80 182% 1564 9.06 175% 1702 12.03 170% 1834 15.33 171% 1957 18.75 171% 2077 22.45 173% 2196 26.47 175% 11775 4858 1651 9.83 183% 1833 14.28 180% 1957 17.83 174% 2069 21.47 171% 2178 25.47 170% 2283 29.60 171% 14025 5786 1933 15.53 184% 2092 20.82 181% 2229 25.91 179% 16275 6714 2219 23.26 184% Class III = Dark Blue section 30 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 2925 1808 585 0.77 226% 6075 3755 766 2.15 213% 1051 4.78 230% 1293 8.03 223% 1501 11.54 223% 9225 5701 1035 5.40 217% 1229 8.73 215% 1420 12.55 224% 1603 16.91 230% 1770 21.75 227% 1925 26.80 225% 2070 31.96 223% 2206 37.30 223% 12375 7648 1326 11.39 220% 1477 15.61 214% 1620 20.13 214% 1761 24.93 219% 1904 30.24 224% 2045 36.01 229% 2177 42.13 231% 15525 9595 1627 21.05 222% 1753 26.22 217% 1869 31.59 214% 1983 37.23 213% 2096 43.06 216% 2208 49.16 219% 18675 11542 1932 35.25 223% 2039 41.36 219% 2141 47.72 216% 2237 54.21 214% 21825 13489 2241 55.01 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² Nozzle Outlet Area: 1.62 ft² 2500 1545 589 0.60 224% 5050 3121 776 1.52 214% 1057 3.59 230% 1293 6.18 222% 1496 9.06 222% 7600 4697 1045 3.65 219% 1238 6.16 217% 1429 9.13 226% 1609 12.62 230% 1772 16.45 225% 1923 20.43 222% 2064 24.56 221% 2196 28.90 220% 10150 6273 1335 7.51 222% 1485 10.64 215% 1628 14.03 216% 1770 17.76 221% 1914 21.93 226% 2052 26.47 230% 2181 31.32 229% 12700 7849 1634 13.68 224% 1760 17.47 218% 1876 21.47 215% 1990 25.68 215% 2103 30.10 218% 2216 34.84 221% 15250 9425 1938 22.72 225% 2045 27.16 221% 2146 31.81 217% 2242 36.63 215% 17800 11001 2245 35.21 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 2000 2481 630 0.77 310% 3925 4870 838 2.18 309% 1134 4.67 307% 1362 7.46 314% 1559 10.59 323% 5850 7258 1085 5.12 318% 1340 8.56 305% 1542 12.24 304% 1717 16.09 306% 1876 20.18 310% 2023 24.49 314% 2160 29.00 319% 2290 33.76 323% 7775 9646 1356 10.32 320% 1571 14.84 312% 1756 19.41 306% 1916 24.19 304% 2062 29.20 305% 2196 34.27 306% 9700 12035 1640 18.57 320% 1821 24.05 317% 1986 29.75 311% 2135 35.37 307% 2272 41.28 305% 11625 14423 1930 30.56 319% 2086 37.01 320% 2232 43.77 316% 13550 16811 2224 47.04 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² 1875 1159 585 0.47 214% 4000 2472 775 1.15 205% 1064 2.87 220% 1296 5.01 213% 1494 7.38 211% 1670 10.05 214% 6125 3786 1043 2.71 208% 1252 4.85 207% 1446 7.34 215% 1626 10.24 220% 1786 13.41 216% 1934 16.76 213% 2071 20.21 212% 2200 23.81 211% 8250 5099 1333 5.56 211% 1501 8.26 205% 1654 11.18 206% 1799 14.33 210% 1943 17.83 215% 2081 21.62 219% 2208 25.61 219% 10375 6412 1633 10.11 213% 1776 13.42 208% 1904 16.90 205% 2026 20.54 205% 2143 24.31 207% 2258 28.33 210% 12500 7726 1938 16.80 214% 2062 20.73 210% 2175 24.80 207% 2281 29.02 205% 14625 9039 2247 26.08 215% Nozzle Outlet Area: 0.806 ft² Nozzle Outlet Area: 0.806 ft² 1800 2233 621 0.60 317% 3600 4467 821 1.67 316% 1120 3.70 313% 1355 6.06 322% 1559 8.75 331% 5400 6700 1071 3.97 325% 1319 6.67 313% 1523 9.68 312% 1701 12.89 314% 1862 16.28 317% 2014 19.97 321% 2157 23.88 326% 2291 27.97 330% 7200 8933 1346 8.09 325% 1549 11.56 319% 1731 15.21 313% 1892 19.07 311% 2038 23.15 311% 2175 27.41 313% 9000 11166 1634 14.67 324% 1803 18.84 324% 1961 23.31 319% 2107 27.82 315% 2243 32.50 312% 10800 13400 1929 24.33 324% 2073 29.20 326% 2210 34.37 323% 12600 15633 2228 37.67 323% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.806 ft² 1350 1675 589 0.43 304% 2950 3660 799 1.27 305% 1091 2.90 300% 1311 4.72 305% 1501 6.78 313% 1667 8.97 318% 4550 5645 1052 3.08 315% 1304 5.39 302% 1502 7.84 299% 1671 10.43 300% 1823 13.14 302% 1962 15.98 304% 2094 19.01 307% 2218 22.17 311% 6150 7630 1331 6.40 316% 1542 9.44 310% 1722 12.54 303% 1880 15.76 300% 2021 19.13 299% 2151 22.62 300% 2272 26.17 300% 7750 9615 1622 11.71 316% 1801 15.45 315% 1961 19.35 309% 2106 23.25 305% 2240 27.23 302% 9350 11600 1921 19.59 315% 2074 23.99 316% 2216 28.59 314% 10950 13586 2224 30.52 315% Class III = Dark Blue section www.tcf.com 31

PerformanceData 330 BAIFE LV (Low Velocity Nozzle) 4025 1030 504 0.86 172% 9175 2347 687 2.55 168% 916 5.80 162% 1128 9.78 170% 1323 14.51 186% 1490 19.52 196% 14325 3665 924 6.18 167% 1117 11.03 167% 1266 15.90 164% 1408 21.19 162% 1547 26.93 164% 1682 33.20 168% 1816 40.16 174% 1943 47.45 180% 19475 4982 1191 12.86 168% 1354 19.47 168% 1487 25.97 167% 1600 32.45 166% 1709 39.18 164% 1814 46.17 162% 1918 53.53 162% 2021 61.21 163% 24625 6300 1471 23.75 169% 1592 31.60 167% 1725 40.24 168% 1833 48.48 168% 1926 56.58 167% 2014 64.74 166% 29775 7617 1757 39.94 169% 1854 49.10 168% 1959 59.05 168% 2070 69.57 168% 34925 8935 2045 62.45 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1275 Max Class III RPM = 2085 Windband Outlet Area: 13.04 ft 2 Wheel Dia.: 33.00" Max Class II RPM = 1636 Tip Speed FPM = 8.64 x RPM Nozzle Outlet Area: 3.91 ft² Nozzle Outlet Area: 3.91 ft² 2675 684 523 0.70 217% 6550 1676 666 1.52 163% 911 4.04 158% 1154 7.74 179% 1402 12.98 251% 1592 18.13 286% 1749 23.18 307% 10425 2667 902 3.60 163% 1100 6.91 163% 1255 10.57 161% 1405 14.84 159% 1556 19.87 158% 1710 25.73 154% 1862 32.36 183% 2023 40.39 214% 14300 3658 1178 7.71 164% 1319 11.59 163% 1469 16.33 163% 1587 21.05 162% 1698 26.14 161% 1809 31.73 160% 1919 37.84 159% 2028 44.41 158% 18175 4650 1466 14.55 164% 1570 18.97 163% 1686 24.23 163% 1809 30.28 163% 1913 36.30 163% 2004 42.31 163% 22050 5641 1758 24.77 164% 1843 29.93 164% 1931 35.60 163% 2026 41.96 163% 25925 6632 2054 39.19 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.93 ft² 1900 486 527 0.55 203% 5000 1279 673 1.17 162% 931 3.28 151% 1166 6.22 150% 1395 10.18 205% 1591 14.54 242% 1751 18.80 260% 1894 23.16 271% 8100 2072 903 2.68 165% 1125 5.54 161% 1289 8.64 157% 1443 12.23 153% 1592 16.33 150% 1738 20.95 150% 1881 26.12 152% 2022 31.91 167% 11200 2865 1174 5.63 167% 1343 9.08 164% 1506 13.16 162% 1633 17.23 160% 1750 21.57 157% 1865 26.31 155% 1975 31.35 153% 2083 36.75 151% 14300 3658 1460 10.56 168% 1587 14.51 165% 1723 19.19 164% 1858 24.46 163% 1968 29.59 161% 2065 34.75 160% 17400 4451 1752 17.98 169% 1855 22.54 167% 1960 27.58 165% 2073 33.34 164% 20500 5244 2047 28.41 169% MV (Medium Velocity Nozzle) Nozzle Outlet Area: 3.91 ft² Nozzle Outlet Area: 2.93 ft² 5250 1790 541 1.18 184% 9725 3316 750 3.38 185% 958 6.65 182% 1162 10.84 193% 14200 4841 993 7.90 191% 1158 12.34 180% 1303 17.16 181% 1441 22.36 183% 1581 28.29 188% 1720 34.90 194% 1852 41.84 200% 18675 6367 1242 15.37 192% 1402 22.14 188% 1513 27.54 181% 1625 33.78 181% 1733 40.24 181% 1837 46.92 182% 1942 54.15 184% 2050 62.12 187% 23150 7893 1504 27.09 193% 1643 35.77 191% 1757 43.53 187% 1844 49.97 181% 1935 57.39 180% 2025 65.29 181% 27625 9419 1770 43.90 194% 1884 53.89 191% 2001 64.54 190% 32100 10944 2040 66.94 194% 4450 1517 558 0.92 181% 7850 2676 769 2.36 183% 974 4.90 181% 1172 8.20 192% 11250 3836 1013 5.24 192% 1172 8.48 180% 1316 12.14 180% 1454 16.20 183% 1593 20.89 189% 1730 26.17 194% 14650 4995 1256 9.75 193% 1409 14.44 186% 1522 18.56 180% 1634 23.23 180% 1741 28.09 180% 1847 33.33 182% 1954 39.08 185% 2061 45.31 188% 18050 6154 1511 16.67 194% 1654 22.98 191% 1756 28.03 184% 1847 33.04 180% 1940 38.73 180% 2030 44.56 180% 21450 7313 1772 26.56 195% 1892 33.87 192% 2004 41.16 189% 2085 46.90 184% 24850 8473 2035 39.88 196% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.93 ft² 3375 1151 563 0.72 173% 6100 2080 771 1.76 172% 991 3.93 173% 1191 6.71 183% 8825 3009 1014 3.86 181% 1190 6.63 170% 1342 9.73 171% 1485 13.20 174% 1624 17.14 179% 1759 21.54 184% 1896 26.57 190% 11550 3938 1253 7.07 182% 1425 11.04 175% 1549 14.60 170% 1669 18.60 171% 1781 22.76 171% 1889 27.20 173% 1997 32.06 175% 14275 4867 1503 11.94 183% 1669 17.36 180% 1781 21.63 174% 1883 26.06 171% 1982 30.90 170% 2077 35.89 171% 17000 5796 1760 18.88 184% 1905 25.31 181% 2029 31.46 179% 19725 6725 2020 28.25 184% Class III = Dark Blue section 32 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 3525 1801 531 0.93 224% 7350 3756 696 2.60 213% 956 5.79 231% 1176 9.73 224% 1365 13.98 223% 11175 5710 942 6.56 217% 1118 10.59 215% 1291 15.19 224% 1458 20.50 231% 1610 26.38 228% 1750 32.45 224% 1882 38.71 223% 2005 45.13 222% 15000 7665 1207 13.83 220% 1345 18.99 214% 1474 24.43 214% 1602 30.25 219% 1732 36.69 224% 1860 43.66 229% 1980 51.08 231% 18825 9619 1482 25.62 222% 1596 31.87 217% 1702 38.43 214% 1805 45.23 213% 1908 52.33 216% 2009 59.67 219% 22650 11574 1761 42.99 223% 1858 50.40 219% 1950 58.06 216% 2037 65.92 214% 26475 13528 2042 67.03 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² Nozzle Outlet Area: 1.96 ft² 3025 1546 536 0.73 225% 6100 3117 705 1.84 214% 961 4.34 230% 1175 7.47 221% 1359 10.93 221% 9175 4688 949 4.40 219% 1124 7.42 217% 1298 11.02 226% 1462 15.24 230% 1610 19.86 224% 1747 24.65 222% 1876 29.68 221% 1996 34.92 221% 12250 6260 1211 9.03 222% 1348 12.81 215% 1478 16.91 216% 1607 21.39 221% 1739 26.47 226% 1864 31.93 230% 1982 37.84 230% 15325 7831 1482 16.43 224% 1596 20.99 218% 1702 25.83 215% 1806 30.91 215% 1909 36.25 218% 2013 42.04 221% 18400 9402 1757 27.26 225% 1855 32.65 221% 1947 38.26 217% 2034 44.06 215% 21475 10973 2036 42.30 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 2425 2485 573 0.93 310% 4750 4867 762 2.64 309% 1031 5.65 307% 1239 9.05 315% 1418 12.83 324% 7075 7249 986 6.19 318% 1218 10.35 305% 1402 14.82 304% 1561 19.47 307% 1705 24.39 310% 1839 29.63 315% 1964 35.11 319% 2081 40.79 322% 9400 9631 1232 12.46 320% 1427 17.91 312% 1595 23.42 305% 1741 29.23 304% 1874 35.30 305% 1996 41.43 306% 11725 12013 1489 22.38 320% 1655 29.07 318% 1804 35.90 311% 1940 42.73 307% 2064 49.83 305% 14050 14395 1752 36.81 319% 1895 44.68 320% 2028 52.86 316% 16375 16778 2020 56.76 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² 2275 1162 532 0.56 214% 4825 2466 703 1.38 205% 966 3.46 220% 1178 6.06 213% 1357 8.90 211% 1518 12.15 214% 7375 3769 945 3.25 208% 1135 5.82 207% 1313 8.85 215% 1476 12.33 220% 1622 16.16 216% 1757 20.22 214% 1881 24.36 212% 1999 28.73 211% 9925 5072 1206 6.63 211% 1359 9.88 205% 1499 13.41 206% 1631 17.19 210% 1763 21.43 215% 1888 25.99 219% 2004 30.82 219% 12475 6375 1476 12.03 213% 1607 16.02 208% 1724 20.22 205% 1835 24.58 205% 1942 29.13 207% 2047 33.98 210% 15025 7678 1751 19.96 214% 1864 24.68 210% 1968 29.60 207% 2064 34.64 205% 17575 8981 2029 30.93 215% Nozzle Outlet Area: 0.976 ft² Nozzle Outlet Area: 0.976 ft² 2175 2228 564 0.73 317% 4350 4457 746 2.02 316% 1018 4.47 314% 1232 7.33 323% 1417 10.57 332% 6525 6685 973 4.79 325% 1199 8.07 313% 1384 11.69 312% 1546 15.57 314% 1693 19.70 318% 1831 24.15 322% 1961 28.89 326% 2083 33.84 331% 8700 8914 1223 9.77 325% 1407 13.95 319% 1572 18.34 313% 1719 23.03 311% 1852 27.97 312% 1976 33.09 312% 10875 11142 1484 17.70 324% 1638 22.75 324% 1781 28.12 319% 1914 33.57 315% 2038 39.25 312% 13050 13371 1752 29.36 324% 1882 35.19 325% 2007 41.45 323% 15225 15599 2023 45.41 323% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 0.976 ft² 1650 1691 537 0.53 304% 3575 3663 727 1.54 305% 992 3.51 300% 1192 5.72 305% 1365 8.21 313% 1516 10.87 318% 5500 5635 956 3.73 315% 1185 6.52 302% 1365 9.48 299% 1519 12.61 300% 1657 15.89 302% 1783 19.31 304% 1903 22.97 307% 2016 26.80 311% 7425 7608 1207 7.68 316% 1400 11.37 310% 1564 15.12 303% 1707 18.99 300% 1836 23.09 299% 1953 27.25 299% 2064 31.58 300% 9350 9580 1471 14.07 316% 1634 18.58 315% 1779 23.25 309% 1912 28.00 305% 2033 32.77 302% 11275 11552 1741 23.48 315% 1881 28.81 316% 2010 34.35 314% 13200 13525 2014 36.50 315% Class III = Dark Blue section www.tcf.com 33

PerformanceData 365 BAIFE LV (Low Velocity Nozzle) 4925 1030 456 1.06 173% 10700 2238 603 2.87 167% 818 6.73 163% 1017 11.59 175% 1193 17.21 190% 1344 23.19 199% 16475 3445 798 6.60 167% 975 12.17 166% 1116 17.88 163% 1252 24.19 163% 1383 31.06 166% 1512 38.78 171% 1636 47.12 179% 1751 55.75 186% 22250 4653 1015 13.26 168% 1172 20.89 168% 1291 28.22 167% 1399 35.77 165% 1501 43.54 163% 1602 51.85 162% 1702 60.59 163% 28025 5861 1245 23.97 169% 1365 33.07 168% 1489 42.86 168% 1585 52.08 167% 1672 61.35 166% 1757 70.88 165% 33800 7068 1480 39.71 169% 1576 50.28 168% 1681 61.79 168% 39575 8276 1718 61.53 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1071 Max Class III RPM = 1760 Windband Outlet Area: 15.95 ft 2 Wheel Dia.: 36.50" Max Class II RPM = 1388 Tip Speed FPM = 9.56 x RPM Nozzle Outlet Area: 4.78 ft² Nozzle Outlet Area: 4.78 ft² 3275 685 473 0.85 217% 7625 1595 586 1.72 164% 816 4.77 158% 1049 9.45 198% 1272 15.74 267% 1435 21.59 296% 11975 2504 776 3.83 163% 962 7.71 163% 1109 12.10 161% 1253 17.34 158% 1400 23.61 161% 1547 30.93 177% 1700 39.81 210% 16325 3414 1002 7.92 164% 1143 12.55 163% 1278 17.95 163% 1388 23.51 162% 1496 29.69 161% 1602 36.46 159% 1708 43.92 159% 20675 4324 1239 14.62 164% 1341 19.76 163% 1459 26.13 163% 1571 33.06 163% 1663 39.87 163% 1748 46.91 162% 25025 5233 1481 24.62 164% 1563 30.50 163% 1651 37.20 163% 1749 44.95 163% 29375 6143 1725 38.56 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 3.59 ft² 2325 486 477 0.68 205% 5800 1213 591 1.33 161% 833 3.88 150% 1055 7.53 163% 1267 12.43 223% 1436 17.42 253% 1578 22.40 267% 9275 1940 778 2.87 165% 983 6.19 160% 1138 9.89 155% 1284 14.24 151% 1426 19.27 150% 1565 25.00 151% 1701 31.49 164% 12750 2666 999 5.80 167% 1166 9.90 164% 1310 14.50 161% 1427 19.24 158% 1540 24.47 156% 1648 30.14 153% 1753 36.26 151% 16225 3393 1233 10.61 168% 1357 15.19 165% 1493 20.82 163% 1612 26.71 162% 1710 32.53 160% 19700 4120 1473 17.78 169% 1574 23.04 166% 1678 28.96 164% 23175 4846 1717 27.87 169% MV (Medium Velocity Nozzle) 5450 1519 505 1.13 182% 9225 2571 676 2.66 182% 868 5.72 182% 1054 9.78 195% 13000 3623 876 5.64 191% 1024 9.41 180% 1159 13.70 181% 1292 18.67 185% 1424 24.41 192% 1558 31.11 200% 16775 4675 1074 10.16 193% 1212 15.27 183% 1322 20.26 180% 1428 25.68 180% 1530 31.45 181% 1634 37.92 184% 1737 44.94 188% 20550 5727 1281 16.92 194% 1415 23.96 190% 1506 29.41 181% 1597 35.60 180% 1685 42.16 180% 24325 6780 1493 26.43 195% 1611 34.85 192% 1709 42.50 187% 28100 7832 1708 39.21 195% Nozzle Outlet Area: 4.78 ft² Nozzle Outlet Area: 3.59 ft² 6425 1791 489 1.44 184% 11400 3177 658 3.77 183% 854 7.71 183% 1044 12.76 195% 16375 4564 858 8.43 191% 1011 13.55 180% 1148 19.22 182% 1280 25.47 185% 1415 32.76 191% 1543 40.56 198% 21350 5950 1060 15.85 192% 1206 23.28 186% 1313 29.70 180% 1420 37.00 181% 1522 44.51 182% 1623 52.58 184% 1726 61.46 187% 26325 7337 1273 27.26 193% 1407 37.15 190% 1506 45.26 184% 1592 53.04 180% 1680 61.88 180% 31300 8724 1490 43.46 193% 1603 55.01 191% 1710 66.58 189% 36275 10110 1711 65.51 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 3.59 ft² 4125 1150 509 0.88 173% 7150 1993 677 1.99 171% 882 4.58 173% 1069 7.98 185% 10175 2836 877 4.17 180% 1040 7.38 170% 1182 11.03 172% 1318 15.24 176% 1449 20.04 182% 1579 25.54 188% 13200 3679 1071 7.36 182% 1226 11.71 173% 1346 16.00 170% 1458 20.62 171% 1564 25.55 172% 1669 31.00 175% 16225 4522 1274 12.12 183% 1428 18.14 179% 1530 22.87 172% 1628 28.16 170% 1722 33.79 170% 19250 5365 1483 18.82 184% 1623 26.14 181% 1731 32.58 177% 22275 6208 1695 27.78 184% Class III = Dark Blue section 34 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 4325 1807 481 1.14 226% 8600 3592 613 2.93 214% 855 6.75 231% 1057 11.43 223% 1228 16.51 223% 12875 5378 812 6.94 217% 980 11.66 217% 1146 17.18 227% 1300 23.55 230% 1440 30.48 225% 1569 37.58 222% 1690 45.00 222% 17150 7164 1029 14.18 220% 1160 20.10 213% 1285 26.46 216% 1409 33.39 221% 1535 41.15 227% 1653 49.48 231% 21425 8949 1254 25.69 222% 1364 32.89 216% 1465 40.41 213% 1566 48.38 215% 1664 56.53 218% 25700 10735 1483 42.50 223% 1577 50.97 218% 1665 59.75 215% 1750 68.94 213% 29975 12521 1715 65.73 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 2.39 ft² Nozzle Outlet Area: 2.39 ft² 3700 1546 484 0.89 224% 7150 2987 621 2.08 215% 859 5.09 229% 1056 8.84 222% 1223 13.04 222% 10600 4428 819 4.70 218% 986 8.25 218% 1153 12.63 229% 1303 17.68 228% 1440 23.16 223% 1566 28.83 221% 1683 34.81 221% 14050 5869 1035 9.36 221% 1165 13.73 214% 1290 18.53 218% 1416 23.96 223% 1541 30.07 229% 1656 36.65 230% 17500 7310 1258 16.67 224% 1367 21.92 217% 1469 27.55 214% 1569 33.45 216% 1669 39.83 220% 20950 8751 1485 27.29 225% 1579 33.45 220% 1667 39.93 216% 1752 46.73 214% 24400 10192 1715 41.90 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 2950 2471 517 1.13 309% 5550 4648 671 2.95 307% 918 6.51 307% 1109 10.58 317% 1272 15.11 325% 8150 6826 854 6.60 317% 1069 11.41 304% 1239 16.65 305% 1385 22.10 308% 1518 27.95 312% 1641 34.16 318% 1755 40.65 322% 10750 9003 1054 12.83 320% 1239 19.10 310% 1395 25.50 305% 1529 32.23 304% 1652 39.26 305% 13350 11181 1264 22.55 320% 1423 30.25 316% 1564 38.03 309% 1690 45.88 305% 15950 13358 1480 36.60 320% 1617 45.54 319% 1744 54.92 314% 18550 15536 1700 55.85 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.39 ft² 2775 1159 481 0.69 214% 5650 2360 620 1.57 205% 863 4.06 219% 1057 7.17 212% 1221 10.63 212% 8525 3561 818 3.51 207% 997 6.52 208% 1165 10.16 217% 1315 14.36 219% 1449 18.93 214% 1572 23.68 212% 1686 28.64 211% 11400 4762 1033 6.92 211% 1178 10.70 204% 1310 14.80 207% 1437 19.36 212% 1562 24.47 218% 1676 29.90 219% 14275 5963 1257 12.33 213% 1381 16.93 207% 1492 21.79 204% 1598 26.89 206% 1700 32.28 209% 17150 7164 1485 20.20 214% 1593 25.61 209% 1691 31.27 206% 20025 8365 1716 31.03 215% Nozzle Outlet Area: 1.19 ft² Nozzle Outlet Area: 1.19 ft² 2650 2219 510 0.89 318% 5100 4271 659 2.28 315% 908 5.19 314% 1105 8.64 325% 1273 12.52 334% 7550 6323 844 5.14 324% 1055 8.98 312% 1226 13.27 312% 1375 17.84 315% 1511 22.79 320% 1638 28.12 324% 1757 33.79 330% 10000 8375 1050 10.19 326% 1225 15.05 318% 1379 20.17 312% 1514 25.68 311% 1637 31.47 312% 1751 37.45 313% 12450 10427 1265 18.09 325% 1412 23.92 323% 1548 30.14 318% 1672 36.42 313% 14900 12479 1486 29.57 324% 1612 36.36 325% 1731 43.58 321% 17350 14531 1711 45.39 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.19 ft² 2000 1675 485 0.64 306% 4175 3497 641 1.73 304% 884 4.06 301% 1067 6.70 307% 1224 9.68 315% 6350 5318 829 4.00 314% 1042 7.24 301% 1207 10.73 300% 1348 14.40 301% 1474 18.25 303% 1591 22.37 306% 1701 26.75 310% 8525 7140 1037 8.03 316% 1217 12.25 308% 1370 16.60 302% 1502 21.17 300% 1619 25.90 299% 1728 30.82 300% 10700 8961 1254 14.39 316% 1409 19.59 314% 1546 24.99 308% 1669 30.39 303% 12875 10783 1478 23.73 315% 1612 29.85 316% 1735 36.28 312% 15050 12605 1705 36.60 315% Class III = Dark Blue section www.tcf.com 35

PerformanceData 402 BAIFE LV (Low Velocity Nozzle) 5975 1028 413 1.28 172% 13000 2236 546 3.47 167% 742 8.19 163% 922 14.07 174% 1082 20.93 190% 1218 28.13 197% 20025 3444 724 8.04 168% 884 14.79 166% 1012 21.73 163% 1135 29.39 163% 1254 37.75 166% 1371 47.14 171% 1484 57.33 180% 1588 67.80 186% 27050 4652 921 16.16 168% 1063 25.42 168% 1170 34.25 166% 1268 43.43 165% 1361 52.92 163% 1453 63.07 162% 1544 73.75 163% 34075 5860 1129 29.15 169% 1238 40.23 168% 1350 52.09 168% 1437 63.29 167% 1516 74.57 166% 1593 86.15 165% 41100 7068 1342 48.27 169% 1429 61.12 168% 1525 75.23 168% 48125 8276 1558 74.83 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 971 Max Class III RPM = 1596 Windband Outlet Area: 19.39 ft 2 Wheel Dia.: 40.25" Max Class II RPM = 1258 Tip Speed FPM = 10.54 x RPM Nozzle Outlet Area: 5.82 ft² Nozzle Outlet Area: 5.82 ft² 4000 688 428 1.03 214% 9300 1599 532 2.10 163% 741 5.83 159% 951 11.50 197% 1153 19.14 266% 1302 26.32 296% 14600 2511 705 4.68 163% 873 9.40 163% 1006 14.73 160% 1137 21.13 159% 1270 28.76 161% 1403 37.66 176% 1541 48.41 209% 19900 3422 911 9.70 164% 1038 15.32 163% 1161 21.94 163% 1260 28.68 162% 1358 36.21 161% 1453 44.36 159% 1549 53.44 158% 25200 4334 1126 17.89 164% 1219 24.20 163% 1325 31.91 163% 1426 40.31 163% 1510 48.66 163% 1587 57.23 162% 30500 5245 1345 30.07 164% 1420 37.29 163% 1499 45.39 163% 1588 54.85 163% 35800 6156 1567 47.13 164% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 4.36 ft² 2825 486 432 0.82 203% 7050 1212 536 1.62 161% 755 4.71 150% 956 9.13 158% 1149 15.11 224% 1302 21.16 252% 1431 27.23 267% 11275 1939 705 3.48 165% 891 7.52 160% 1032 12.03 155% 1164 17.30 151% 1294 23.47 151% 1419 30.38 151% 1543 38.33 165% 15500 2666 905 7.03 167% 1057 12.03 163% 1188 17.64 161% 1294 23.39 158% 1396 29.73 156% 1494 36.62 153% 1590 44.12 152% 19725 3392 1118 12.89 168% 1230 18.45 165% 1354 25.32 163% 1462 32.50 162% 1551 39.58 160% 23950 4119 1336 21.64 169% 1427 27.99 166% 1522 35.24 164% 28175 4845 1556 33.82 169% MV (Medium Velocity Nozzle) 6625 1518 458 1.37 182% 11225 2573 613 3.23 182% 787 6.95 182% 956 11.90 195% 15825 3627 795 6.88 191% 929 11.46 180% 1051 16.66 180% 1172 22.73 185% 1292 29.73 192% 1412 37.78 199% 20425 4681 975 12.39 193% 1100 18.62 183% 1199 24.64 179% 1296 31.31 180% 1388 38.29 181% 1482 46.14 184% 1575 54.65 188% 25025 5736 1163 20.64 194% 1285 29.26 190% 1368 35.94 182% 1449 43.36 180% 1529 51.36 180% 29625 6790 1356 32.29 195% 1463 42.56 192% 1552 51.90 187% 34225 7844 1551 47.87 195% Nozzle Outlet Area: 5.82 ft² Nozzle Outlet Area: 4.36 ft² 7825 1793 444 1.76 184% 13875 3180 597 4.59 183% 774 9.36 183% 947 15.53 195% 19925 4567 779 10.29 191% 917 16.49 180% 1041 23.37 181% 1161 31.00 185% 1283 39.83 191% 1400 49.42 198% 25975 5953 962 19.32 192% 1094 28.34 186% 1191 36.15 180% 1288 45.03 181% 1380 54.11 182% 1472 63.98 184% 1566 74.87 187% 32025 7340 1154 33.12 193% 1276 45.18 190% 1366 55.07 184% 1444 64.55 180% 1523 75.18 180% 38075 8727 1352 52.94 193% 1454 66.94 191% 1551 81.02 189% 44125 10113 1552 79.73 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 4.36 ft² 5025 1152 462 1.07 173% 8725 2000 616 2.44 172% 801 5.60 173% 970 9.73 185% 12425 2848 798 5.11 180% 945 9.03 170% 1074 13.49 172% 1196 18.58 176% 1315 24.43 182% 1432 31.09 187% 16125 3696 975 9.06 182% 1115 14.36 173% 1224 19.60 170% 1326 25.29 171% 1421 31.25 172% 1516 37.89 175% 19825 4544 1160 14.91 183% 1300 22.31 179% 1392 28.08 172% 1481 34.55 170% 1566 41.42 171% 23525 5392 1351 23.19 184% 1478 32.17 181% 1575 40.01 177% 27225 6240 1544 34.23 184% Class III = Dark Blue section 36 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 5250 1803 436 1.38 226% 10475 3597 556 3.56 213% 776 8.23 231% 959 13.94 224% 1114 20.12 224% 15700 5391 738 8.50 217% 890 14.25 217% 1040 20.96 227% 1180 28.75 230% 1306 37.13 225% 1424 45.87 223% 1533 54.84 222% 20925 7186 936 17.40 220% 1054 24.59 213% 1167 32.34 216% 1279 40.77 221% 1393 50.22 227% 1500 60.36 231% 26150 8980 1141 31.56 222% 1240 40.30 216% 1332 49.54 213% 1423 59.23 215% 1512 69.22 218% 31375 10774 1350 52.28 223% 1435 62.63 218% 1514 73.26 215% 1591 84.50 213% 36600 12569 1561 80.83 223% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 2.91 ft² Nozzle Outlet Area: 2.91 ft² 4500 1545 439 1.08 224% 8700 2988 563 2.53 215% 779 6.19 229% 957 10.73 220% 1110 15.90 223% 12900 4430 744 5.75 218% 895 10.07 219% 1045 15.33 228% 1182 21.52 228% 1306 28.18 223% 1420 35.06 221% 1526 42.33 220% 17100 5872 939 11.39 221% 1057 16.72 214% 1171 22.60 218% 1284 29.14 223% 1397 36.54 229% 1502 44.60 230% 21300 7315 1142 20.34 224% 1241 26.74 217% 1333 33.57 214% 1424 40.78 216% 1514 48.48 220% 25500 8757 1348 33.29 225% 1433 40.76 220% 1513 48.68 216% 1589 56.85 214% 29700 10199 1557 51.13 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 3600 2481 469 1.38 309% 6750 4652 609 3.59 307% 832 7.91 307% 1005 12.84 317% 1153 18.35 324% 9900 6823 774 8.01 317% 969 13.86 304% 1123 20.21 305% 1256 26.86 309% 1376 33.93 312% 1488 41.52 318% 1592 49.47 323% 13050 8994 955 15.57 320% 1122 23.12 310% 1264 30.92 305% 1386 39.13 304% 1497 47.62 305% 16200 11165 1144 27.26 320% 1288 36.56 316% 1416 46.00 309% 1531 55.60 305% 19350 13336 1339 44.19 319% 1464 55.09 319% 1579 66.43 314% 22500 15507 1538 67.43 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.91 ft² 3375 1159 436 0.84 214% 6850 2352 561 1.90 205% 782 4.93 219% 958 8.70 212% 1106 12.87 211% 10325 3546 739 4.22 207% 903 7.90 209% 1055 12.29 217% 1191 17.39 219% 1313 22.95 214% 1424 28.68 212% 1528 34.73 211% 13800 4739 933 8.32 211% 1065 12.90 204% 1185 17.87 207% 1301 23.41 212% 1414 29.59 217% 1518 36.21 219% 17275 5932 1135 14.81 213% 1248 20.38 207% 1349 26.27 204% 1445 32.42 206% 1538 38.97 209% 20750 7126 1340 24.20 214% 1439 30.80 209% 1527 37.57 206% 24225 8319 1548 37.15 215% Nozzle Outlet Area: 1.45 ft² Nozzle Outlet Area: 1.45 ft² 3225 2223 462 1.08 317% 6200 4273 598 2.77 316% 823 6.30 314% 1002 10.50 325% 1154 15.21 333% 9175 6323 765 6.24 324% 956 10.89 312% 1111 16.09 312% 1246 21.65 315% 1370 27.69 320% 1486 34.23 325% 1593 41.06 330% 12150 8374 951 12.34 325% 1110 18.26 318% 1250 24.49 312% 1372 31.16 311% 1484 38.22 312% 1588 45.54 314% 15125 10424 1146 21.93 325% 1280 29.05 323% 1403 36.58 318% 1516 44.26 313% 18100 12474 1347 35.92 324% 1461 44.13 325% 1569 52.92 321% 21075 14524 1550 55.02 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.45 ft² 2450 1688 440 0.78 304% 5075 3498 581 2.10 304% 801 4.93 300% 968 8.16 308% 1110 11.77 315% 7700 5307 751 4.85 314% 943 8.75 301% 1093 12.98 299% 1221 17.44 300% 1336 22.15 303% 1442 27.14 306% 1542 32.47 310% 10325 7116 937 9.66 316% 1101 14.78 308% 1240 20.05 302% 1359 25.55 299% 1466 31.33 299% 1565 37.30 300% 12950 8925 1133 17.30 316% 1274 23.60 314% 1398 30.10 308% 1510 36.67 303% 15575 10734 1334 28.45 315% 1456 35.85 316% 1568 43.64 312% 18200 12543 1539 43.89 315% Class III = Dark Blue section www.tcf.com 37

PerformanceData 445 BAIFE LV (Low Velocity Nozzle) 7300 1027 374 1.57 174% 15900 2237 494 4.25 167% 671 10.00 163% 834 17.21 174% 978 25.54 189% 1102 34.42 198% 24500 3447 655 9.84 167% 800 18.10 166% 916 26.63 163% 1027 35.97 163% 1135 46.25 166% 1240 57.64 171% 1342 70.07 179% 1436 82.86 185% 33100 4657 833 19.75 168% 962 31.12 168% 1059 41.95 167% 1148 53.24 165% 1232 64.86 163% 1315 77.26 162% 1396 90.08 163% 41700 5867 1022 35.71 169% 1120 49.21 167% 1222 63.81 168% 1301 77.58 167% 1372 91.31 166% 1442 105.56 165% 50300 7078 1215 59.17 169% 1294 74.95 168% 1380 92.08 168% 58900 8288 1411 91.81 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 878 Max Class III RPM = 1444 Windband Outlet Area: 23.70 ft 2 Wheel Dia.: 44.50" Max Class II RPM = 1138 Tip Speed FPM = 11.65 x RPM Nozzle Outlet Area: 7.11 ft² Nozzle Outlet Area: 7.11 ft² 4875 686 388 1.27 217% 11350 1597 481 2.56 164% 670 7.12 159% 860 14.04 197% 1043 23.39 267% 1177 32.10 296% 17825 2508 637 5.70 163% 789 11.46 163% 910 18.01 161% 1028 25.80 158% 1148 35.08 160% 1269 46.01 177% 1394 59.16 209% 24300 3419 823 11.82 164% 938 18.68 163% 1049 26.74 163% 1139 34.99 162% 1227 44.12 161% 1314 54.20 159% 1401 65.31 158% 30775 4330 1017 21.78 164% 1101 29.46 163% 1197 38.87 163% 1289 49.18 163% 1365 59.38 163% 1435 69.90 162% 37250 5241 1216 36.71 164% 1284 45.54 163% 1355 55.39 163% 1436 67.00 163% 43725 6152 1417 57.57 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 5.33 ft² 3450 485 391 1.00 204% 8625 1214 485 1.98 161% 683 5.76 150% 865 11.18 161% 1039 18.46 223% 1178 25.90 253% 1295 33.35 268% 13800 1942 638 4.26 165% 806 9.19 160% 934 14.73 155% 1053 21.16 151% 1170 28.67 150% 1284 37.19 152% 1395 46.80 163% 18975 2670 820 8.64 167% 957 14.75 163% 1075 21.58 161% 1171 28.63 158% 1264 36.45 156% 1352 44.83 153% 1438 53.92 151% 24150 3398 1012 15.79 168% 1114 22.63 165% 1225 30.97 163% 1323 39.77 162% 1404 48.49 160% 29325 4126 1210 26.55 169% 1293 34.39 166% 1378 43.20 164% 34500 4854 1410 41.57 169% MV (Medium Velocity Nozzle) 8100 1519 414 1.68 181% 13725 2574 554 3.94 181% 712 8.50 182% 865 14.57 195% 19350 3628 719 8.40 191% 841 14.05 180% 951 20.39 181% 1060 27.77 185% 1169 36.38 192% 1278 46.27 200% 24975 4683 882 15.15 193% 995 22.76 183% 1085 30.16 180% 1172 38.25 180% 1256 46.87 181% 1341 56.47 184% 1425 66.86 188% 30600 5738 1052 25.24 194% 1162 35.74 190% 1237 43.89 182% 1311 53.04 180% 1383 62.78 179% 36225 6793 1227 39.52 195% 1323 51.99 192% 1404 63.46 187% 41850 7847 1404 58.65 195% Nozzle Outlet Area: 7.11 ft² Nozzle Outlet Area: 5.33 ft² 9550 1791 401 2.13 184% 16950 3178 540 5.61 183% 700 11.44 183% 857 19.01 196% 24350 4566 704 12.55 191% 829 20.12 180% 942 28.61 182% 1050 37.88 185% 1161 48.75 192% 1266 60.36 198% 31750 5953 870 23.61 192% 990 34.69 186% 1077 44.15 180% 1165 55.04 181% 1248 66.11 182% 1331 78.13 184% 1416 91.43 187% 39150 7341 1044 40.50 193% 1154 55.21 190% 1235 67.23 184% 1306 78.88 180% 1378 91.98 180% 46550 8729 1223 64.73 193% 1315 81.79 191% 1403 99.06 189% 53950 10116 1404 97.50 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 5.33 ft² 6125 1149 418 1.31 174% 10650 1997 556 2.96 171% 724 6.82 173% 877 11.88 185% 15175 2845 721 6.23 180% 855 11.05 171% 971 16.46 172% 1082 22.72 176% 1189 29.83 181% 1296 38.06 188% 19700 3694 882 11.07 182% 1008 17.52 173% 1107 23.96 170% 1199 30.88 171% 1285 38.18 172% 1371 46.30 175% 24225 4542 1049 18.22 183% 1175 27.21 179% 1259 34.31 172% 1339 42.18 170% 1416 50.58 171% 28750 5391 1222 28.35 184% 1336 39.25 181% 1425 48.94 177% 33275 6239 1397 41.88 184% Class III = Dark Blue section 38 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 6425 1805 394 1.69 225% 12800 3597 503 4.36 214% 702 10.07 231% 867 17.01 223% 1007 24.54 223% 19175 5388 667 10.37 217% 804 17.35 217% 941 25.63 227% 1067 35.10 230% 1181 45.33 224% 1288 56.05 224% 1386 66.92 221% 25550 7179 846 21.23 220% 953 30.03 213% 1055 39.46 216% 1157 49.84 221% 1260 61.37 227% 1356 73.63 230% 31925 8970 1031 38.46 222% 1121 49.19 216% 1204 60.43 213% 1286 72.20 214% 1367 84.48 218% 38300 10761 1219 63.58 223% 1296 76.21 218% 1368 89.27 215% 1437 102.84 213% 44675 12553 1410 98.40 223% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 3.56 ft² Nozzle Outlet Area: 3.56 ft² 5500 1545 397 1.32 224% 10650 2992 510 3.10 215% 705 7.59 229% 866 13.15 221% 1004 19.44 223% 15800 4439 674 7.05 218% 810 12.33 218% 946 18.80 228% 1070 26.38 228% 1182 34.53 224% 1285 42.95 221% 1381 51.85 221% 20950 5886 851 14.01 221% 958 20.56 214% 1060 27.69 218% 1163 35.78 223% 1265 44.84 229% 1359 54.59 230% 26100 7334 1035 25.01 224% 1124 32.81 217% 1208 41.27 214% 1290 50.09 216% 1371 59.48 220% 31250 8781 1222 40.96 225% 1299 50.15 220% 1371 59.82 216% 1440 69.89 214% 36400 10228 1412 62.99 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 4400 2480 424 1.69 308% 8250 4651 551 4.39 308% 753 9.68 307% 909 15.69 317% 1043 22.43 325% 12100 6821 700 9.78 317% 876 16.91 304% 1016 24.72 305% 1136 32.83 309% 1245 41.52 313% 1346 50.76 318% 1440 60.47 323% 15950 8991 863 18.97 320% 1015 28.27 310% 1143 37.76 305% 1254 47.87 304% 1354 58.20 305% 19800 11161 1035 33.35 320% 1165 44.69 316% 1281 56.26 309% 1385 67.99 305% 23650 13331 1211 54.00 319% 1324 67.31 319% 1428 81.17 314% 27500 15502 1391 82.40 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.56 ft² 4125 1159 394 1.02 213% 8375 2353 507 2.31 205% 708 6.04 219% 866 10.62 212% 1001 15.76 212% 12625 3547 669 5.17 207% 816 9.63 208% 955 15.06 218% 1077 21.24 218% 1188 28.08 214% 1288 35.06 212% 1382 42.45 211% 16875 4742 845 10.21 211% 964 15.81 204% 1072 21.85 207% 1177 28.64 212% 1279 36.17 217% 1373 44.26 219% 21125 5936 1027 18.12 213% 1129 24.92 207% 1220 32.10 204% 1307 39.63 206% 1391 47.62 209% 25375 7130 1213 29.66 214% 1302 37.68 209% 1382 46.00 206% 29625 8324 1401 45.49 215% Nozzle Outlet Area: 1.77 ft² Nozzle Outlet Area: 1.77 ft² 3925 2213 418 1.32 319% 7550 4256 539 3.35 315% 744 7.68 314% 906 12.81 325% 1044 18.58 335% 11175 6299 690 7.56 324% 864 13.27 312% 1004 19.60 312% 1126 26.36 315% 1238 33.72 319% 1343 41.69 325% 1440 50.04 330% 14800 8343 858 14.97 326% 1002 22.17 318% 1128 29.71 312% 1239 37.87 311% 1341 46.54 312% 1435 55.45 314% 18425 10386 1034 26.60 325% 1155 35.24 323% 1266 44.36 317% 1369 53.79 313% 22050 12430 1214 43.43 324% 1318 53.50 325% 1416 64.22 321% 25675 14473 1397 66.54 323% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.77 ft² 3000 1691 398 0.96 303% 6225 3509 527 2.60 304% 725 6.04 300% 876 10.00 307% 1005 14.44 315% 9450 5327 681 5.98 314% 855 10.78 301% 990 15.95 299% 1106 21.43 301% 1210 27.21 303% 1305 33.27 305% 1395 39.75 309% 12675 7145 850 11.91 316% 999 18.25 309% 1124 24.69 302% 1232 31.47 300% 1328 38.50 299% 1417 45.77 300% 15900 8963 1029 21.41 316% 1156 29.14 314% 1268 37.13 308% 1369 45.18 303% 19125 10781 1212 35.25 316% 1322 44.35 316% 1422 53.80 312% 22350 12599 1398 54.34 315% Class III = Dark Blue section www.tcf.com 39

PerformanceData 490 BAIFE LV (Low Velocity Nozzle) 8875 1030 339 1.90 171% 19300 2240 449 5.16 167% 609 12.11 163% 758 20.92 175% 889 31.07 191% 1001 41.79 198% 29725 3450 595 11.94 167% 726 21.90 166% 832 32.30 163% 933 43.67 163% 1031 56.13 166% 1126 69.88 171% 1219 85.04 179% 1305 100.69 186% 40150 4659 757 23.99 168% 874 37.78 168% 962 50.90 167% 1042 64.45 165% 1119 78.67 163% 1194 93.63 162% 1268 109.28 163% 50575 5869 929 43.42 169% 1018 59.82 168% 1110 77.42 168% 1182 94.17 167% 1246 110.71 166% 1310 128.11 165% 61000 7079 1104 71.86 169% 1175 90.84 168% 1254 111.84 168% 71425 8289 1282 111.47 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 797 Max Class III RPM = 1311 Windband Outlet Area: 28.74 ft 2 Wheel Dia.: 49.00" Max Class II RPM = 1033 Tip Speed FPM = 12.83 x RPM Nozzle Outlet Area: 8.62 ft² Nozzle Outlet Area: 8.62 ft² 5900 685 352 1.53 216% 13750 1596 436 3.09 163% 608 8.61 158% 781 17.01 197% 947 28.33 267% 1069 38.92 296% 21600 2507 579 6.93 163% 717 13.93 163% 826 21.80 160% 933 31.22 158% 1043 42.58 161% 1152 55.71 163% 1266 71.72 210% 29450 3418 747 14.30 164% 852 22.66 163% 953 32.45 163% 1034 42.38 162% 1115 53.59 161% 1193 65.66 159% 1272 79.12 158% 37300 4329 924 26.44 164% 1000 35.73 163% 1087 47.12 163% 1171 59.70 163% 1239 71.89 163% 1303 84.72 162% 45150 5240 1104 44.47 164% 1166 55.21 163% 1230 67.07 163% 1304 81.22 163% 53000 6151 1286 69.66 164% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² 4175 485 355 1.21 204% 10450 1213 440 2.39 161% 621 7.01 151% 786 13.58 163% 944 22.41 224% 1070 31.41 253% 1176 40.41 268% 16725 1941 580 5.18 165% 732 11.14 160% 848 17.85 155% 957 25.72 152% 1063 34.80 151% 1166 45.08 152% 1267 56.76 163% 23000 2669 744 10.44 167% 869 17.87 164% 977 26.22 161% 1064 34.76 158% 1148 44.20 156% 1228 54.37 154% 1306 65.38 151% 29275 3397 919 19.15 168% 1011 27.38 165% 1113 37.60 163% 1202 48.28 162% 1275 58.78 160% 35550 4126 1099 32.20 169% 1174 41.67 166% 1251 52.32 164% 41825 4854 1280 50.34 169% MV (Medium Velocity Nozzle) 9800 1516 376 2.03 182% 16625 2571 503 4.78 182% 646 10.28 182% 785 17.62 195% 23450 3627 653 10.19 191% 763 16.98 179% 864 24.75 181% 963 33.71 185% 1061 44.03 192% 1160 56.01 199% 30275 4682 801 18.37 193% 904 27.63 183% 985 36.53 179% 1064 46.33 180% 1140 56.73 181% 1218 68.50 184% 1294 81.04 188% 37100 5738 956 30.66 194% 1055 43.30 189% 1124 53.30 182% 1191 64.38 180% 1256 76.12 179% 43925 6793 1114 47.87 195% 1202 63.11 192% 1275 76.94 187% 50750 7849 1275 71.10 195% Nozzle Outlet Area: 8.62 ft² Nozzle Outlet Area: 6.47 ft² 11575 1790 364 2.58 183% 20550 3178 490 6.79 183% 636 13.89 183% 778 23.03 196% 29525 4566 640 15.26 191% 753 24.41 180% 855 34.62 181% 954 45.99 185% 1054 59.05 191% 1150 73.24 198% 38500 5954 790 28.61 192% 899 42.05 186% 978 53.52 180% 1058 66.73 181% 1134 80.29 182% 1209 94.79 184% 1286 110.88 187% 47475 7342 949 49.25 193% 1049 67.13 190% 1122 81.61 184% 1186 95.63 180% 1252 111.67 180% 56450 8730 1111 78.55 193% 1195 99.36 191% 1274 120.06 189% 65425 10118 1275 118.20 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² 7425 1148 379 1.58 173% 12900 1995 505 3.59 171% 657 8.26 173% 797 14.43 185% 18375 2842 654 7.53 180% 776 13.37 171% 881 19.91 172% 982 27.49 176% 1080 36.19 182% 1176 46.02 187% 23850 3689 800 13.38 182% 915 21.22 173% 1004 28.94 170% 1088 37.36 171% 1166 46.17 172% 1244 55.98 174% 29325 4535 951 21.98 183% 1066 32.90 179% 1142 41.46 172% 1215 51.03 170% 1285 61.20 171% 34800 5382 1108 34.21 184% 1212 47.45 181% 1292 59.06 177% 40275 6229 1267 50.58 184% Class III = Dark Blue section 40 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 7800 1808 358 2.05 225% 15525 3598 457 5.29 214% 637 12.18 230% 787 20.60 222% 915 29.81 223% 23250 5388 606 12.59 217% 730 21.02 216% 854 31.02 227% 969 42.56 230% 1073 55.04 225% 1169 67.83 222% 1259 81.20 222% 30975 7178 768 25.71 220% 865 36.35 213% 958 47.82 216% 1051 60.47 221% 1144 74.35 227% 1232 89.39 231% 38700 8969 936 46.58 222% 1017 59.45 216% 1093 73.19 213% 1168 87.56 215% 1241 102.31 218% 46425 10759 1107 77.08 223% 1177 92.41 218% 1242 108.14 215% 1305 124.68 213% 54150 12549 1280 119.16 223% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 4.32 ft² Nozzle Outlet Area: 4.32 ft² 6675 1547 361 1.61 225% 12900 2990 463 3.76 215% 640 9.19 229% 787 15.97 222% 911 23.51 221% 19125 4432 611 8.51 218% 735 14.91 218% 859 22.78 229% 971 31.91 228% 1073 41.79 224% 1167 52.05 222% 1254 62.81 221% 25350 5875 772 16.93 222% 869 24.85 214% 962 33.50 218% 1055 43.22 223% 1148 54.23 229% 1234 66.14 230% 31575 7317 938 30.13 224% 1019 39.58 217% 1095 49.76 214% 1170 60.49 216% 1244 71.92 220% 37800 8760 1108 49.43 225% 1177 60.40 220% 1243 72.18 216% 1306 84.40 214% 44025 10203 1279 75.78 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 5325 2476 385 2.04 309% 10000 4649 500 5.31 307% 684 11.75 308% 826 19.06 317% 947 27.18 324% 14675 6822 636 11.88 317% 796 20.54 304% 922 29.90 305% 1031 39.73 308% 1131 50.39 313% 1222 61.49 318% 1307 73.20 322% 19350 8996 784 23.03 320% 922 34.30 310% 1038 45.79 305% 1139 58.08 304% 1230 70.64 305% 24025 11169 941 40.57 320% 1059 54.34 316% 1164 68.34 309% 1258 82.49 305% 28700 13343 1101 65.69 320% 1203 81.75 319% 1298 98.69 314% 33375 15516 1264 100.09 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 4.32 ft² 5000 1159 358 1.24 213% 10175 2358 461 2.81 205% 643 7.33 219% 787 12.90 212% 909 19.11 211% 15350 3557 609 6.31 207% 742 11.72 208% 868 18.32 217% 979 25.83 219% 1079 34.07 214% 1171 42.68 213% 1256 51.62 212% 20525 4757 769 12.45 211% 877 19.26 204% 975 26.61 207% 1070 34.84 212% 1163 44.04 217% 1248 53.82 219% 25700 5956 935 22.14 213% 1028 30.45 207% 1110 39.12 204% 1189 48.29 206% 1265 57.98 209% 30875 7155 1105 36.29 214% 1186 46.09 209% 1258 56.15 206% 36050 8355 1277 55.76 215% Nozzle Outlet Area: 2.15 ft² Nozzle Outlet Area: 2.15 ft² 4775 2220 380 1.61 319% 9175 4265 490 4.08 314% 676 9.33 314% 823 15.55 325% 948 22.54 334% 13575 6311 628 9.23 324% 785 16.12 312% 912 23.79 312% 1023 32.02 315% 1125 40.98 320% 1220 50.62 325% 1308 60.74 329% 17975 8357 780 18.21 325% 911 26.98 318% 1026 36.20 312% 1126 46.03 311% 1218 56.48 312% 1304 67.39 314% 22375 10402 940 32.35 325% 1050 42.87 323% 1151 53.99 317% 1244 65.35 313% 26775 12448 1104 52.87 324% 1198 65.05 325% 1287 78.07 321% 31175 14493 1271 81.11 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.15 ft² 3625 1685 361 1.15 303% 7525 3498 478 3.13 304% 658 7.31 300% 795 12.09 307% 912 17.45 315% 11425 5311 617 7.19 314% 775 12.99 301% 898 19.26 299% 1004 25.93 301% 1098 32.89 303% 1185 40.29 306% 1267 48.18 310% 15325 7125 771 14.39 316% 905 21.95 308% 1019 29.77 302% 1117 37.95 299% 1205 46.53 299% 1286 55.35 300% 19225 8938 932 25.75 316% 1047 35.03 313% 1149 44.70 307% 1241 54.45 303% 23125 10751 1098 42.42 316% 1198 53.41 316% 1289 64.84 312% 27025 12564 1266 65.32 315% Class III = Dark Blue section www.tcf.com 41

PerformanceData 542 BAIFE LV (Low Velocity Nozzle) 10875 1030 307 2.34 174% 23650 2239 406 6.35 167% 550 14.84 163% 684 25.57 174% 803 38.08 191% 904 51.19 198% 36425 3448 537 14.60 167% 656 26.88 166% 751 39.52 163% 842 53.39 163% 931 68.74 166% 1017 85.64 171% 1101 104.21 179% 1178 123.19 185% 49200 4658 684 29.44 168% 789 46.23 168% 869 62.41 167% 941 78.96 165% 1011 96.51 163% 1078 114.61 162% 1146 134.19 163% 61975 5867 839 53.20 169% 919 73.20 167% 1003 95.01 168% 1067 115.24 167% 1125 135.56 166% 1183 156.94 165% 74750 7077 997 88.04 169% 1061 111.26 168% 1132 136.86 168% 87525 8286 1157 136.31 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 720 Max Class III RPM = 1184 Windband Outlet Area: 35.23 ft 2 Wheel Dia.: 54.25" Max Class II RPM = 933 Tip Speed FPM = 14.20 x RPM Nozzle Outlet Area: 10.56 ft² Nozzle Outlet Area: 10.56 ft² 7250 686 318 1.88 216% 16850 1595 394 3.79 163% 549 10.54 158% 706 20.90 198% 856 34.80 267% 966 47.77 297% 26450 2504 522 8.45 163% 647 17.02 163% 746 26.71 161% 843 38.30 158% 942 52.17 161% 1041 68.36 177% 1144 88.00 210% 36050 3413 674 17.48 164% 769 27.72 163% 860 39.68 163% 934 51.97 162% 1006 65.48 161% 1078 80.58 160% 1149 96.99 158% 45650 4322 833 32.23 164% 902 43.63 163% 981 57.62 163% 1057 73.04 164% 1118 87.88 163% 1176 103.62 162% 55250 5231 996 54.32 164% 1051 67.28 163% 1110 82.01 163% 1176 99.11 163% 64850 6139 1160 85.05 165% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 7.93 ft² 5125 485 321 1.49 206% 12800 1212 398 2.94 162% 560 8.55 150% 710 16.64 164% 853 27.50 225% 966 38.44 253% 1062 49.50 268% 20475 1938 523 6.32 165% 661 13.65 160% 766 21.88 156% 864 31.48 151% 960 42.63 151% 1053 55.22 152% 1145 69.66 166% 28150 2665 672 12.80 167% 784 21.84 163% 881 31.99 161% 960 42.48 158% 1036 54.05 156% 1109 66.62 154% 1179 80.01 151% 35825 3392 829 23.38 168% 912 33.45 165% 1004 45.92 163% 1084 58.93 162% 1150 71.77 160% 43500 4118 991 39.28 169% 1059 50.89 166% 1129 63.99 164% 51175 4845 1155 61.53 169% MV (Medium Velocity Nozzle) 12025 1517 340 2.50 182% 20375 2571 454 5.84 181% 584 12.63 183% 709 21.59 195% 28725 3624 590 12.50 191% 689 20.80 180% 780 30.30 181% 870 41.34 185% 958 53.91 192% 1048 68.69 200% 37075 4678 723 22.47 193% 816 33.81 183% 889 44.68 179% 961 56.78 180% 1030 69.60 181% 1099 83.69 184% 1169 99.38 188% 45425 5731 862 37.39 194% 952 52.92 189% 1014 65.11 182% 1075 78.76 180% 1134 93.20 180% 53775 6785 1005 58.48 195% 1085 77.23 192% 1150 93.92 187% 62125 7838 1150 86.80 195% Nozzle Outlet Area: 10.56 ft² Nozzle Outlet Area: 7.93 ft² 14200 1792 329 3.18 184% 25200 3179 443 8.34 183% 574 16.98 183% 703 28.26 196% 36200 4567 578 18.70 191% 680 29.91 180% 772 42.40 181% 862 56.44 185% 952 72.38 191% 1039 89.86 198% 47200 5955 714 35.14 192% 812 51.54 186% 884 65.74 180% 956 81.90 181% 1024 98.35 182% 1092 116.19 184% 1162 136.08 187% 58200 7343 857 60.33 193% 947 82.15 190% 1014 100.20 184% 1072 117.47 181% 1131 136.95 180% 69200 8731 1003 96.14 193% 1079 121.67 191% 1151 147.28 189% 80200 10119 1152 145.03 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 7.93 ft² 9125 1151 343 1.95 174% 15825 1997 456 4.40 171% 594 10.15 174% 720 17.70 186% 22525 2842 591 9.24 180% 701 16.39 171% 796 24.42 172% 887 33.70 176% 975 44.29 182% 1063 56.54 188% 29225 3687 722 16.36 182% 826 25.97 173% 907 35.49 170% 982 45.69 171% 1053 56.57 172% 1124 68.69 175% 35925 4533 859 26.94 183% 963 40.35 179% 1031 50.76 172% 1097 62.48 170% 1160 74.90 170% 42625 5378 1000 41.84 184% 1094 58.06 181% 1166 72.22 177% 49325 6223 1143 61.77 184% Class III = Dark Blue section 42 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 9550 1806 323 2.50 224% 19025 3597 412 6.45 213% 575 14.90 230% 711 25.26 222% 826 36.47 222% 28500 5389 547 15.40 216% 660 25.84 217% 772 38.11 227% 875 52.13 230% 969 67.43 225% 1056 83.18 223% 1137 99.49 222% 37975 7180 694 31.55 220% 782 44.68 213% 866 58.77 216% 949 74.06 221% 1033 91.06 227% 1113 109.64 231% 47450 8971 846 57.21 222% 919 72.97 216% 988 89.92 213% 1055 107.34 215% 1121 125.45 218% 56925 10763 1000 94.52 223% 1063 113.24 218% 1123 132.98 215% 1179 152.94 213% 66400 12554 1157 146.40 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 5.29 ft² Nozzle Outlet Area: 5.29 ft² 8175 1546 326 1.97 225% 15825 2992 418 4.60 215% 578 11.26 229% 711 19.59 222% 823 28.83 222% 23475 4438 552 10.44 218% 664 18.29 218% 776 27.94 228% 877 39.11 228% 969 51.23 223% 1054 63.82 221% 1133 77.10 221% 31125 5885 698 20.82 221% 786 30.58 215% 869 41.09 217% 954 53.18 223% 1037 66.51 229% 1115 81.19 230% 38775 7331 849 37.17 224% 922 48.77 217% 990 61.17 214% 1058 74.41 216% 1124 88.26 220% 46425 8778 1002 60.81 225% 1065 74.43 220% 1124 88.77 216% 1181 103.82 214% 54075 10224 1157 93.32 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 6550 2484 348 2.51 308% 12275 4655 452 6.53 307% 618 14.42 308% 746 23.37 317% 856 33.40 325% 18000 6826 574 14.53 317% 719 25.19 304% 833 36.69 305% 932 48.84 308% 1021 61.68 312% 1104 75.45 318% 1181 89.85 322% 23725 8997 709 28.33 320% 833 42.08 310% 938 56.21 305% 1029 71.24 304% 1111 86.60 305% 29450 11168 850 49.74 320% 956 66.51 316% 1051 83.68 309% 1136 101.05 305% 35175 13339 994 80.41 319% 1087 100.32 319% 1172 120.85 314% 40900 15510 1142 122.79 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 5.29 ft² 6125 1158 323 1.51 212% 12450 2354 416 3.44 205% 581 8.99 220% 711 15.82 213% 821 23.42 211% 18775 3550 549 7.69 207% 670 14.35 208% 783 22.36 217% 884 31.63 219% 974 41.67 214% 1057 52.19 212% 1134 63.16 211% 25100 4746 693 15.16 211% 791 23.51 204% 880 32.54 207% 966 42.63 212% 1050 53.89 218% 1127 65.92 220% 31425 5942 843 26.99 213% 927 37.15 207% 1001 47.74 204% 1073 59.04 206% 1142 70.96 209% 37750 7137 996 44.21 214% 1069 56.15 209% 1134 68.43 206% 44075 8333 1150 67.74 215% Nozzle Outlet Area: 2.64 ft² Nozzle Outlet Area: 2.64 ft² 5850 2218 343 1.96 318% 11225 4257 443 5.01 316% 610 11.39 314% 743 19.03 325% 856 27.58 334% 16600 6295 566 11.24 324% 708 19.66 312% 823 29.07 312% 924 39.22 316% 1015 50.03 319% 1101 61.85 324% 1181 74.32 329% 21975 8333 703 22.17 325% 821 32.84 318% 925 44.10 312% 1016 56.22 311% 1099 68.97 312% 1176 82.16 313% 27350 10372 847 39.37 325% 946 52.13 323% 1038 65.83 317% 1122 79.71 313% 32725 12410 995 64.38 324% 1080 79.25 325% 1160 95.05 321% 38100 14448 1145 98.64 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.64 ft² 4450 1688 327 1.43 306% 9225 3498 432 3.85 305% 595 8.99 301% 718 14.82 307% 824 21.42 316% 14000 5309 557 8.80 314% 700 15.92 301% 811 23.60 299% 906 31.69 300% 991 40.22 303% 1070 49.34 306% 1144 58.99 310% 18775 7120 696 17.61 316% 818 26.96 309% 920 36.44 301% 1009 46.53 300% 1088 56.97 299% 1161 67.75 300% 23550 8931 841 31.47 316% 946 42.98 314% 1038 54.82 308% 1121 66.75 303% 28325 10741 991 51.88 316% 1081 65.28 316% 1164 79.42 312% 33100 12552 1143 79.97 315% Class III = Dark Blue section www.tcf.com 43

PerformanceData 600 BAIFE LV (Low Velocity Nozzle) 13300 1029 277 2.85 171% 28925 2239 367 7.76 167% 498 18.23 163% 619 31.36 175% 726 46.57 191% 817 62.53 197% 44550 3448 486 17.91 168% 593 32.85 166% 679 48.33 163% 762 65.48 163% 842 84.15 167% 920 104.91 172% 995 127.28 178% 1065 150.63 185% 60175 4657 618 35.93 168% 713 56.46 168% 786 76.43 167% 851 96.64 165% 914 118.01 163% 975 140.32 162% 1036 164.06 163% 75800 5866 758 64.92 169% 831 89.57 168% 906 115.88 168% 965 141.07 167% 1017 165.72 166% 1069 191.64 165% 91425 7076 901 107.53 169% 960 136.38 168% 1023 167.16 168% 107050 8285 1046 166.68 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 651 Max Class III RPM = 1071 Windband Outlet Area: 43.10 ft 2 Wheel Dia.: 60.00" Max Class II RPM = 844 Tip Speed FPM = 15.71 x RPM Nozzle Outlet Area: 12.92 ft² Nozzle Outlet Area: 12.92 ft² 8875 687 287 2.29 213% 20625 1596 356 4.63 163% 497 12.94 159% 638 25.53 197% 774 42.59 267% 873 58.36 296% 32375 2506 472 10.34 163% 585 20.82 163% 675 32.75 161% 762 46.82 158% 852 63.89 162% 941 83.57 163% 1034 107.55 210% 44125 3415 610 21.44 164% 695 33.86 163% 778 48.61 163% 844 63.46 162% 910 80.20 161% 974 98.36 159% 1039 118.69 158% 55875 4324 754 39.55 164% 816 53.45 163% 887 70.48 163% 956 89.43 164% 1012 107.85 163% 1063 126.63 162% 67625 5234 901 66.54 164% 951 82.47 163% 1004 100.42 163% 1064 121.47 163% 79375 6143 1049 104.08 164% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 9.69 ft² 6275 486 290 1.82 204% 15675 1213 360 3.60 162% 507 10.49 151% 642 20.37 164% 771 33.62 224% 874 47.13 253% 960 60.53 267% 25075 1941 473 7.73 165% 598 16.72 160% 693 26.81 156% 781 38.48 151% 868 52.16 151% 952 67.55 151% 1035 85.17 165% 34475 2668 608 15.69 167% 709 26.72 163% 797 39.19 161% 869 52.14 159% 937 66.17 156% 1003 81.56 154% 1067 98.15 152% 43875 3396 750 28.65 168% 826 41.11 165% 909 56.39 164% 981 72.26 162% 1041 88.08 160% 53275 4123 897 48.20 169% 958 62.34 166% 1021 78.30 164% 62675 4851 1045 75.41 169% MV (Medium Velocity Nozzle) 14700 1516 307 3.04 182% 24925 2571 411 7.17 182% 528 15.45 182% 641 26.41 195% 35150 3626 533 15.25 191% 623 25.45 179% 705 37.02 181% 786 50.46 185% 867 66.13 192% 948 84.14 201% 45375 4680 654 27.52 193% 738 41.39 183% 804 54.69 179% 869 69.48 180% 931 85.06 181% 994 102.48 184% 1057 121.58 188% 55600 5735 780 45.84 194% 862 65.01 190% 917 79.68 182% 972 96.34 180% 1026 114.23 180% 65825 6790 909 71.60 195% 981 94.45 192% 1041 115.28 187% 76050 7844 1041 106.54 196% Nozzle Outlet Area: 12.92 ft² Nozzle Outlet Area: 9.69 ft² 17375 1792 298 3.91 185% 30850 3182 401 10.24 184% 519 20.78 183% 636 34.65 196% 44325 4572 523 22.93 191% 616 36.80 180% 699 52.09 182% 779 68.95 185% 861 88.65 191% 939 109.83 198% 1016 132.89 207% 57800 5962 646 43.07 192% 735 63.26 186% 799 80.34 180% 864 100.06 180% 926 120.38 182% 988 142.46 184% 1051 166.69 187% 71275 7352 776 74.12 193% 857 100.76 190% 917 122.64 184% 970 144.03 181% 1023 167.72 180% 84750 8742 908 118.04 193% 977 149.48 191% 1042 180.83 189% 98225 10132 1043 178.11 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 9.69 ft² 11150 1150 310 2.39 174% 19350 1996 413 5.41 172% 537 12.41 174% 651 21.65 186% 27550 2842 534 11.28 180% 633 19.98 170% 720 29.91 172% 802 41.23 176% 882 54.26 182% 961 69.13 188% 35750 3687 653 20.03 182% 747 31.79 173% 820 43.40 170% 888 55.91 171% 952 69.18 172% 1016 83.95 175% 43950 4533 777 33.00 183% 870 49.23 179% 932 62.04 172% 992 76.46 170% 1049 91.66 171% 52150 5379 904 51.15 184% 989 70.98 181% 1055 88.53 177% 60350 6225 1034 75.68 184% Class III = Dark Blue section 44 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 11700 1808 292 3.06 223% 23300 3601 373 7.92 213% 520 18.24 230% 643 30.94 222% 747 44.67 223% 34900 5394 495 18.88 216% 597 31.66 217% 698 46.64 227% 792 63.99 231% 876 82.48 224% 955 101.87 223% 1028 121.75 221% 46500 7187 628 38.69 220% 707 54.64 213% 783 71.90 216% 858 90.60 221% 935 111.79 228% 1006 134.03 230% 58100 8980 765 70.01 222% 832 89.61 216% 893 109.89 213% 954 131.36 214% 1014 153.68 218% 69700 10773 905 115.93 223% 962 138.89 218% 1016 162.97 215% 1067 187.61 213% 81300 12566 1047 179.53 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² Nozzle Outlet Area: 6.47 ft² 10000 1546 295 2.42 226% 19350 2991 378 5.63 215% 523 13.80 229% 642 23.86 220% 744 35.25 221% 28700 4436 499 12.76 218% 600 22.33 218% 702 34.23 229% 793 47.85 228% 876 62.62 223% 953 78.05 222% 1024 94.17 220% 38050 5881 631 25.45 221% 710 37.30 214% 786 50.31 218% 862 64.92 223% 938 81.45 229% 1008 99.26 230% 47400 7326 767 45.35 224% 833 59.52 217% 895 74.79 214% 956 90.85 216% 1016 107.86 220% 56750 8771 906 74.39 225% 963 91.06 220% 1016 108.49 216% 1067 126.70 214% 66100 10216 1046 114.11 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 8000 2481 315 3.08 310% 15025 4659 409 8.01 308% 559 17.67 308% 675 28.65 318% 774 40.87 325% 22050 6837 520 17.88 317% 651 30.95 305% 754 45.05 305% 843 59.83 308% 924 75.69 313% 999 92.56 318% 1068 110.02 322% 29075 9016 642 34.82 320% 754 51.67 310% 849 69.01 305% 931 87.36 304% 1005 106.14 305% 36100 11194 770 61.20 320% 866 81.84 316% 952 102.97 310% 1029 124.34 306% 43125 13372 901 99.12 320% 984 123.18 319% 1061 148.44 314% 50150 15550 1034 150.85 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² 7500 1159 292 1.85 212% 15250 2357 377 4.24 206% 525 10.98 219% 643 19.37 213% 742 28.62 210% 23000 3555 497 9.44 207% 606 17.57 208% 709 27.48 218% 799 38.66 218% 881 51.05 214% 956 63.92 212% 1025 77.22 211% 30750 4753 628 18.67 211% 716 28.85 204% 796 39.86 207% 874 52.26 212% 950 66.07 218% 1019 80.64 219% 38500 5951 763 33.11 213% 839 45.57 207% 906 58.57 204% 971 72.41 206% 1033 86.91 209% 46250 7148 901 54.15 214% 968 68.99 209% 1027 84.11 206% 54000 8346 1042 83.39 215% Nozzle Outlet Area: 3.22 ft² Nozzle Outlet Area: 3.22 ft² 7150 2217 310 2.40 318% 13750 4264 400 6.11 314% 552 13.98 314% 672 23.30 325% 774 33.76 333% 20350 6310 513 13.85 324% 641 24.15 312% 745 35.70 312% 836 48.10 316% 918 61.29 319% 996 75.82 324% 1069 91.27 331% 26950 8357 637 27.30 325% 744 40.46 318% 838 54.30 312% 920 69.12 311% 995 84.76 312% 1065 101.06 314% 33550 10403 768 48.57 325% 857 64.16 323% 940 80.95 317% 1016 98.01 313% 40150 12450 902 79.38 324% 979 97.72 326% 1051 117.04 321% 46750 14496 1038 121.63 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.22 ft² 5425 1682 295 1.73 304% 11275 3496 390 4.69 304% 537 10.94 300% 649 18.11 307% 745 26.19 316% 17125 5310 504 10.79 314% 633 19.49 301% 733 28.83 299% 819 38.74 300% 896 49.19 303% 968 60.45 307% 1034 72.08 309% 22975 7124 629 21.51 316% 739 32.90 308% 832 44.60 301% 912 56.86 299% 984 69.75 299% 1050 82.94 300% 28825 8938 761 38.59 316% 855 52.52 313% 939 67.17 308% 1014 81.76 303% 34675 10752 896 63.46 315% 978 80.00 316% 1053 97.31 312% 40525 12566 1034 97.97 315% Class III = Dark Blue section www.tcf.com 45

PerformanceData 660 BAIFE LV (Low Velocity Nozzle) 16075 1028 252 3.45 173% 34975 2237 333 9.33 167% 452 21.94 163% 562 37.79 173% 660 56.33 191% 743 75.72 198% 53875 3446 442 21.70 168% 539 39.73 166% 617 58.40 162% 692 78.97 163% 765 101.61 166% 836 126.74 171% 905 154.19 179% 968 182.11 185% 72775 4655 562 43.52 168% 648 68.26 168% 714 92.27 167% 774 117.10 165% 830 142.31 163% 886 169.56 162% 941 197.96 163% 91675 5864 689 78.53 169% 755 108.18 167% 824 140.41 168% 877 170.54 167% 925 200.82 166% 972 232.00 165% 110575 7073 819 130.07 169% 872 164.62 168% 930 202.26 168% 129475 8282 951 201.75 169% LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 592 Max Class III RPM = 973 Windband Outlet Area: 52.14 ft 2 Wheel Dia.: 66.00" Max Class II RPM = 767 Tip Speed FPM = 17.28 x RPM Nozzle Outlet Area: 15.63 ft² Nozzle Outlet Area: 15.63 ft² 10725 686 261 2.77 214% 24950 1596 324 5.62 163% 451 15.58 157% 580 30.89 197% 703 51.39 266% 794 70.71 297% 39175 2506 430 12.59 163% 532 25.22 163% 613 39.50 160% 693 56.72 158% 774 77.15 160% 855 100.96 164% 940 130.14 210% 53400 3416 554 25.87 163% 632 41.01 163% 707 58.75 163% 768 77.00 162% 827 96.95 161% 886 119.23 159% 944 143.36 158% 67625 4326 685 47.77 164% 742 64.72 163% 807 85.48 163% 869 108.17 163% 920 130.49 163% 967 153.53 162% 81850 5235 819 80.49 164% 865 99.95 163% 913 121.61 163% 967 146.85 163% 96075 6145 954 126.08 164% LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 11.73 ft² 7575 485 264 2.21 207% 18950 1212 327 4.35 161% 461 12.71 151% 583 24.56 158% 701 40.68 224% 794 56.90 252% 873 73.29 268% 30325 1940 430 9.36 165% 543 20.17 160% 629 32.29 155% 710 46.55 151% 789 63.08 150% 866 81.88 153% 941 103.07 165% 41700 2667 552 18.91 167% 645 32.40 164% 725 47.51 161% 789 62.85 158% 852 80.12 156% 911 98.42 153% 970 118.76 152% 53075 3395 682 34.69 168% 751 49.77 165% 826 68.14 163% 892 87.49 162% 946 106 160% 64450 4122 815 58.23 169% 871 75.45 166% 929 95.00 164% 75825 4850 950 91.24 169% MV (Medium Velocity Nozzle) 17800 1517 279 3.68 181% 30150 2570 373 8.64 181% 480 18.70 183% 583 31.99 195% 42500 3623 484 18.40 191% 566 30.73 179% 641 44.81 181% 715 61.16 185% 788 79.95 192% 861 101.50 199% 54850 4675 594 33.22 193% 670 49.88 183% 731 66.21 180% 790 84.07 180% 846 102.79 181% 904 124.13 184% 961 147.13 188% 67200 5728 708 55.22 194% 783 78.48 190% 833 96.20 181% 883 116.33 180% 932 137.90 180% 79550 6781 826 86.53 195% 891 113.99 192% 945 138.89 187% 91900 7833 945 128.36 195% Nozzle Outlet Area: 15.63 ft² Nozzle Outlet Area: 11.73 ft² 21025 1792 271 4.73 185% 37300 3179 364 12.34 183% 472 25.17 183% 578 41.87 196% 53575 4567 475 27.66 191% 559 44.28 180% 635 62.89 182% 708 83.34 185% 783 107.33 192% 854 132.99 198% 69850 5954 586 51.78 192% 667 76.14 186% 726 97.05 180% 785 120.84 181% 842 145.72 182% 898 172.20 184% 955 201.31 187% 86125 7341 704 89.13 193% 778 121.40 190% 833 148.05 184% 881 173.78 181% 929 202.27 180% 102400 8728 825 142.59 194% 887 180.15 191% 946 217.92 189% 118675 10115 947 214.72 194% MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 11.73 ft² 13500 1151 282 2.89 174% 23425 1997 375 6.52 171% 488 15.00 173% 591 26.09 184% 33350 2843 486 13.70 180% 576 24.24 170% 654 36.10 172% 729 49.87 176% 802 65.70 182% 873 83.47 187% 43275 3689 594 24.28 182% 679 38.44 173% 746 52.62 171% 808 67.83 171% 866 83.86 172% 924 101.70 175% 53200 4535 706 39.87 183% 792 59.82 179% 848 75.26 172% 902 92.56 170% 954 111.03 171% 63125 5381 822 61.93 184% 900 86.14 181% 959 107.08 177% 73050 6227 940 91.57 184% Class III = Dark Blue section 46 Twin City Fan Catalog 390

HV (High Velocity Nozzle) 14150 1807 266 3.73 226% 28150 3596 339 9.58 213% 473 22.10 231% 585 37.49 224% 679 53.99 223% 42150 5384 450 22.85 217% 542 38.13 217% 634 56.25 227% 719 77.06 230% 797 99.96 226% 868 123.06 223% 935 147.40 223% 56150 7172 570 46.59 220% 642 65.88 213% 711 86.66 216% 780 109.56 221% 849 134.68 227% 914 161.77 230% 70150 8960 694 84.18 221% 755 107.84 216% 811 132.54 213% 866 158.19 214% 921 185.36 218% 84150 10748 821 139.40 223% 873 167.17 218% 922 196.13 215% 968 225.58 213% 98150 12537 950 215.99 224% HV7 (High Velocity Nozzle) Nozzle Outlet Area: 7.83 ft² Nozzle Outlet Area: 7.83 ft² 12100 1546 268 2.92 225% 23400 2989 343 6.78 214% 475 16.65 229% 584 28.92 221% 677 42.77 223% 34700 4432 454 15.47 218% 546 27.09 219% 638 41.37 229% 721 57.91 228% 796 75.65 222% 866 94.30 221% 931 113.96 221% 46000 5876 573 30.69 221% 645 45.04 214% 714 60.73 218% 783 78.34 223% 852 98.29 229% 916 119.94 230% 57300 7319 697 54.81 224% 757 71.94 217% 813 90.29 214% 869 109.88 216% 924 130.66 220% 68600 8762 823 89.80 225% 874 109.64 220% 923 131.02 216% 970 153.31 214% 79900 10206 950 137.68 226% PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) 9675 2479 286 3.71 309% 18150 4650 371 9.62 307% 508 21.34 308% 613 34.54 317% 703 49.30 324% 26625 6822 472 21.52 317% 591 37.28 304% 685 54.37 305% 766 72.25 308% 839 91.19 312% 907 111.48 317% 971 133.07 323% 35100 8993 582 41.77 320% 684 62.09 310% 771 83.19 305% 845 105.13 304% 913 128.07 305% 43575 11164 698 73.40 320% 786 98.50 316% 864 123.89 309% 934 149.66 305% 52050 13336 817 119.00 320% 893 148.23 319% 963 178.67 314% 60525 15507 938 181.34 319% XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 7.83 ft² 9075 1159 266 2.25 214% 18450 2357 342 5.09 205% 477 13.26 218% 584 23.37 211% 675 34.69 212% 27825 3554 452 11.44 207% 551 21.27 208% 644 33.16 217% 727 46.90 219% 801 61.78 214% 869 77.31 212% 932 93.48 211% 37200 4752 570 22.49 210% 651 34.93 204% 724 48.30 207% 794 63.11 212% 863 79.76 217% 927 97.78 220% 46575 5949 694 40.13 213% 762 54.98 207% 824 70.96 204% 882 87.40 206% 939 105.14 209% 55950 7147 819 65.50 214% 879 83.20 209% 933 101.56 206% 65325 8344 947 100.81 215% Nozzle Outlet Area: 3.90 ft² Nozzle Outlet Area: 3.90 ft² 8650 2216 282 2.91 319% 16625 4260 364 7.41 315% 502 16.93 315% 611 28.20 325% 704 40.90 335% 24600 6303 466 16.72 324% 582 29.11 311% 677 43.14 312% 760 58.19 316% 835 74.26 320% 906 91.88 326% 971 110.13 330% 32575 8346 579 33.02 326% 676 48.87 318% 761 65.47 312% 836 83.50 311% 904 102.35 312% 967 121.80 313% 40550 10389 697 58.47 325% 779 77.60 323% 854 97.74 317% 923 118.31 313% 48525 12433 819 95.69 324% 889 117.83 325% 955 141.39 321% 56500 14476 943 146.87 324% XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.90 ft² 6575 1685 268 2.09 303% 13650 3497 355 5.69 305% 489 13.30 301% 590 21.91 307% 677 31.65 315% 20725 5310 458 13.04 314% 576 23.65 302% 667 34.99 299% 745 46.97 301% 815 59.62 303% 880 73.15 307% 940 87.22 309% 27800 7123 572 26.05 316% 672 39.84 308% 757 54.10 302% 829 68.78 299% 895 84.53 300% 955 100.50 300% 34875 8935 692 46.73 316% 778 63.72 314% 853 81.09 307% 922 98.99 303% 41950 10748 815 76.91 316% 889 96.77 316% 957 117.64 312% 49025 12561 940 118.55 315% Class III = Dark Blue section www.tcf.com 47

DimensionalData C O.D. CK OAH NH Arrangement 1 C LDISCH C L HSG CG O.D. BH DIA.BASE HOLES K M M L C L HSG DE K C LSHAFT TOP VIEW R R OAL OAW FOUNDATION PLAN 1. 'CW' rotation is shown, 'CCW' rotation is similar but opposite. OAL OAH CLASS I & II CLASS III OAW C CG CK DE NH SIZE LV, MV, LV, MV, LV7, MV7 LV5, MV5 LV7, MV7 LV5, MV5 HV, XV HV, XV 122 69.25 31.58 31.58 30.80 32.52 32.52 31.74 50.12 13.25 27.16 24.88 14.50 19.12 135 75.99 33.78 33.78 32.91 34.72 34.72 33.84 54.47 14.56 29.44 27.19 15.75 21.30 150 84.57 37.75 37.16 37.16 38.69 38.09 38.09 59.82 16.19 32.25 29.96 17.75 23.92 165 92.39 39.89 39.27 39.27 40.70 40.08 40.08 65.11 17.75 35.03 32.73 19.00 26.54 182 91.81 43.69 42.97 42.97 44.94 44.22 44.22 71.27 19.50 38.26 32.75 21.00 22.56 200 100.18 47.00 46.22 45.69 48.25 47.47 46.94 77.50 21.38 41.50 35.67 22.75 24.94 222 110.62 52.96 52.08 51.49 54.21 53.33 52.74 85.37 23.75 45.66 39.43 25.50 28.00 245 121.75 57.92 56.95 56.32 59.73 58.76 58.13 93.38 26.06 49.83 43.20 28.00 31.06 270 119.80 63.16 62.10 61.38 65.04 63.98 63.26 102.24 28.50 54.45 36.09 30.50 31.78 300 127.72 74.56 73.38 72.59 72.25 71.06 70.28 112.81 31.63 60.00 39.84 28.50 35.56 330 140.20 81.09 79.78 78.90 78.15 76.84 75.96 123.39 34.75 65.55 43.60 31.00 39.34 365 154.24 85.70 84.27 83.30 84.27 82.83 81.86 133.99 38.50 72.03 47.99 33.50 43.75 402 170.17 91.07 89.47 88.41 92.23 90.64 89.57 147.00 42.44 78.96 52.69 37.00 48.48 445 187.22 98.92 97.17 95.98 101.10 99.35 98.17 161.81 46.88 86.83 58.02 40.00 53.83 490 206.17 105.14 103.20 101.92 109.95 108.01 106.73 177.48 51.63 95.15 63.66 44.00 59.50 542 228.42 117.24 115.09 113.68 117.93 115.77 114.37 195.79 57.13 104.86 70.24 49.00 66.12 600 252.50 124.56 122.19 120.63 129.00 126.63 125.06 215.81 63.13 115.50 77.45 54.00 73.37 660 277.33 136.18 133.58 131.83 140.49 137.89 136.14 236.46 69.38 126.60 84.97 59.00 80.93 K L LV, MV, CLASS I SIZE LV7, MV7 LV5, MV5 CLASS III HV, XV & II M R BH 122 6.06 6.06 5.28 10.00 7.50 6.50 18.00 0.44 135 6.63 6.63 5.76 10.50 8.00 7.13 19.25 0.44 150 7.19 6.60 6.60 12.00 9.50 8.00 21.00 0.44 165 7.81 7.19 7.19 12.50 9.50 8.75 22.50 0.44 182 9.44 8.72 8.72 13.50 10.50 9.63 24.25 0.56 200 10.13 9.35 8.82 14.50 11.50 10.63 26.25 0.56 222 10.75 9.88 9.28 16.50 13.75 11.50 29.50 0.56 245 12.69 11.72 11.10 18.00 15.25 12.63 30.75 0.56 270 13.69 12.63 11.91 20.00 17.25 13.88 33.25 0.56 300 14.63 13.44 12.66 26.88 19.00 15.63 38.25 0.81 330 15.75 14.44 13.56 29.50 21.00 17.13 41.25 0.81 365 17.13 15.69 14.72 29.50 22.50 18.63 45.25 0.81 402 18.13 16.54 15.47 30.00 24.00 20.38 48.75 0.81 445 20.81 19.06 17.87 31.63 27.00 22.38 51.75 0.81 490 22.50 20.56 19.28 32.00 29.00 24.88 56.75 0.81 542 24.13 21.97 20.57 36.63 29.50 27.13 62.25 0.81 600 26.38 24.01 22.44 36.38 32.50 30.13 69.25 0.81 660 28.31 25.72 23.97 39.00 35.00 32.63 75.25 0.81 48 Twin City Fan Catalog 390

C O.D. CK NH Arrangement 9 C LSHAFT C LDISCH OAH CG O.D. BH DIA.BASE HOLES K M M L DimensionalData DE C L HSG OAL OAW TOP VIEW K 'R' C LSHAFT 'R' FOUNDATION PLAN 1. 'CW' rotation is shown, 'CCW' rotation is similar but opposite. OAH OAL DE CLASS I & II CLASS III OAW C CG CK SIZE CL. I & II CL. III LV, MV, LV7, MV7, LV5, MV5, LV, MV, LV7, MV7, LV5, MV5, CL. I & II CL. III HV, XV HV7, XV7 HV5, XV5 HV, XV HV7, XV7 HV5, XV5 122 57.13 63.38 36.08 36.08 35.30 42.89 42.89 42.11 29.40 13.25 27.16 24.88 14.50 20.75 135 61.69 69.44 40.28 40.28 39.41 50.72 50.72 49.84 32.16 14.56 29.44 27.19 15.75 23.50 150 67.65 73.65 42.75 42.16 42.16 52.69 52.09 52.09 35.45 16.19 32.25 29.96 17.75 23.75 165 72.86 77.61 47.27 46.64 46.64 54.71 54.08 54.08 38.77 17.75 35.03 32.73 19.00 23.75 182 76.25 81.50 54.44 53.72 53.72 59.94 59.22 59.22 42.64 19.50 38.26 32.75 21.00 26.25 200 82.24 88.99 56.75 55.97 55.44 65.00 64.22 63.69 46.56 21.38 41.50 35.67 22.75 29.50 222 89.62 94.12 59.96 59.08 58.49 68.46 67.59 66.99 51.46 23.75 45.66 39.43 25.50 30.00 245 97.70 99.95 63.42 62.45 61.82 71.48 70.51 69.88 56.49 26.06 49.83 43.20 28.00 30.25 270 95.02 97.52 69.54 68.48 67.76 76.92 75.85 75.13 62.04 28.50 54.45 36.09 30.50 33.00 300 99.16 104.16 74.56 73.38 72.59 81.38 80.19 79.41 68.62 31.63 60.00 39.84 28.50 33.50 330 101.10 104.10 81.09 79.78 78.90 85.28 83.96 83.09 75.34 34.75 65.55 43.60 31.00 34.00 365 110.74 114.74 85.70 84.27 83.30 97.90 96.46 95.49 81.21 38.50 72.03 47.99 33.50 37.50 402 121.94 125.19 91.17 89.57 88.51 110.61 109.02 107.95 89.29 42.44 78.96 52.69 37.00 40.25 445 133.64 134.64 98.92 97.17 95.98 116.23 114.48 113.29 98.48 46.88 86.83 58.02 40.00 41.00 490 146.91 146.91 105.14 103.20 101.92 122.08 120.14 118.86 108.21 51.63 95.15 63.66 44.00 44.00 542 162.55 162.55 117.24 115.09 113.68 130.18 128.02 126.62 119.56 57.13 104.86 70.24 49.00 49.00 600 179.39 179.39 124.56 122.19 120.63 137.75 135.38 133.81 132.00 63.13 115.50 77.45 54.00 54.00 660 196.66 196.66 136.18 133.58 131.83 146.74 144.15 142.40 144.61 69.38 126.60 84.97 59.00 59.00 K L MAX MOTOR FRAME NH LV, MV, LV7, MV7, LV5, MV5, M R BH SIZE CL. I & II CL. III CL. I & II CL. III HV, XV HV7, XV7 HV5, XV5 122 19.12 6.06 6.06 5.28 14.50 17.38 6.50 18.00 0.44 145T 215T 135 21.30 6.63 6.63 5.76 17.00 22.75 7.13 19.25 0.44 184T 256T 150 23.92 7.19 6.60 6.60 17.00 22.75 8.00 21.00 0.44 184T 256T 165 26.54 7.81 7.19 7.19 19.88 22.75 8.75 22.50 0.44 215T 256T 182 22.56 9.44 8.72 8.72 24.25 25.00 9.63 24.25 0.56 254T 286T 200 24.94 10.13 9.35 8.82 24.25 26.50 10.63 26.25 0.56 254T 326T 222 28.00 10.75 9.88 9.28 23.50 26.75 11.50 29.50 0.56 256T 326T 245 31.06 12.69 11.72 11.10 23.50 26.75 12.63 30.75 0.56 256T 326T 270 31.78 13.69 12.63 11.91 26.38 27.88 13.88 33.25 0.56 284T 365T 300 35.56 14.63 13.44 12.66 26.88 28.13 15.63 38.25 0.81 286T 365T 330 39.34 15.75 14.44 13.56 29.50 28.13 17.13 41.25 0.81 324T 365T 365 43.75 17.13 15.69 14.72 29.50 34.88 18.63 45.25 0.81 324T 405T 402 48.48 18.13 16.54 15.47 30.00 41.13 20.38 48.75 0.81 326T 405T 445 53.83 20.81 19.06 17.87 31.63 41.13 22.38 51.75 0.81 364T 405T 490 59.50 22.50 20.56 19.28 32.00 41.13 24.88 56.75 0.81 364T 405T 542 66.12 24.13 21.97 20.57 36.63 41.25 27.13 62.25 0.81 404T 405T 600 73.37 26.38 24.01 22.44 36.38 41.25 30.13 69.25 0.81 404T 405T 660 80.93 28.31 25.72 23.97 39.00 41.75 32.63 75.25 0.81 405T 405T www.tcf.com 49

DimensionalData C O.D. Arrangement 4 CK NH DE C L DISCH. C L SHAFT OAH OAL OAW OAL MOTOR OAH SIZE FRAME LV, MV, LV7, MV7, LV5, MV5, HV, XV HV7, XV7 HV5, XV5 OAW C CK DE NH 122 145T 69.25 32.96 32.96 32.17 50.12 13.25 24.88 14.50 19.12 135 145T 184T 75.99 34.59 34.59 33.72 54.47 14.56 27.19 15.75 21.30 150 145T 184T 84.57 26.44 25.84 25.84 59.82 16.19 29.96 17.75 23.92 145T 165 184T 215T 92.39 42.52 41.89 41.89 65.11 17.75 32.73 19.00 26.54 145T 182 184T 215T 256T 91.81 49.44 48.72 48.72 71.27 19.50 32.75 21.00 22.56 184T 200 215T 256T 100.18 51.56 50.78 50.25 77.50 21.38 35.67 22.75 24.94 184T 222 215T 256T 110.62 55.77 54.89 54.30 85.37 23.75 39.43 25.50 28.00 245 215T 256T 121.75 58.60 57.63 57.01 93.38 26.06 43.20 28.00 31.06 215T 270 256T 286T 119.80 64.16 63.10 62.38 102.24 28.50 36.09 30.50 31.78 215T 300 256T 286T 127.72 67.88 66.69 65.91 112.81 31.63 39.84 28.50 35.56 256T 330 286T 326T 140.20 74.21 72.90 72.03 123.39 34.75 43.60 31.00 39.34 256T 365 286T 326T 154.24 78.83 77.39 76.42 133.99 38.50 47.99 33.50 43.75 50 Twin City Fan Catalog 390

CG O.D. Arrangement 4 'LN' SPACES @ L R M M C L SHAFT C L HSG R BH DIA. BASE HOLES K K DimensionalData K CG LV, MV, LV7, MV7, LV5, MV5, SIZE HV, XV HV7, XV7 HV5, XV5 L LN M R BH 122 27.16 5.87 5.87 5.09 9.06 1 6.75 18.00 0.44 135 29.44 6.40 6.40 5.52 8.94 10.69 1 7.38 19.25 0.44 150 32.25 6.96 6.37 6.37 8.88 10.63 1 8.25 21.00 0.44 8.38 165 35.03 7.84 7.21 7.21 10.13 13.00 1 8.75 22.50 0.44 9.25 182 38.26 8.52 7.80 7.80 11.00 12.75 16.75 1 9.63 24.25 0.56 10.81 200 41.50 9.21 8.43 7.90 12.56 16.56 1 10.63 26.25 0.56 11.50 222 45.66 10.05 9.18 8.59 13.25 17.25 1 11.75 29.50 0.56 245 49.83 10.93 9.96 9.34 13.06 17.06 1 12.88 30.75 0.56 12.75 270 54.45 11.90 10.84 10.12 16.75 9.25 1 14.13 33.25 0.56 12.25 300 60.00 13.34 12.15 11.37 16.25 9.00 1 15.88 38.25 0.81 15.31 330 65.55 14.53 13.22 12.34 17.06 9.44 1 17.38 41.25 0.81 15.31 365 72.03 15.94 14.50 13.53 17.06 9.44 1 18.88 45.25 0.81 www.tcf.com 51

DimensionalData C O.D. CK NH Arrangement 10 C L HSG C L DISCH OAH CG O.D. L M M C L HSG BH DIA. BASE HOLES K DE C L SHAFT K OAL OAW 'R' 'R' 1. 'CW' rotation is shown, 'CCW' rotation is similar but opposite. OAH OAL DE K CLASS I & II OAW C CG CK NH LV, MV, LV7, MV7, LV5, MV5, SIZE CL. I & II LV, MV, LV7, MV7, LV5, MV5, CL. I & II HV, XV HV7, XV7 HV5, XV5 HV, XV HV7, XV7 HV5, XV5 122 72.38 40.08 40.08 39.30 29.40 13.25 27.16 24.88 17.63 19.12 5.75 5.75 4.97 135 79.36 44.28 44.28 43.41 32.16 14.56 29.44 27.19 19.13 21.30 6.31 6.31 5.44 150 86.19 46.25 45.66 45.66 35.45 16.19 32.25 29.96 19.38 23.92 6.88 6.28 6.28 165 92.77 48.27 47.64 47.64 38.77 17.75 35.03 32.73 19.38 26.54 7.50 6.88 6.88 182 92.69 55.94 55.22 55.22 42.64 19.50 38.26 32.75 21.88 22.56 8.19 7.47 7.47 200 100.18 58.25 57.47 56.94 46.56 21.38 41.50 35.67 22.75 24.94 8.88 8.09 7.56 222 110.62 61.21 60.33 59.74 51.46 23.75 45.66 39.43 25.50 28.00 10.00 9.13 8.53 245 121.75 64.17 63.20 62.57 56.49 26.06 49.83 43.20 28.00 31.06 10.88 9.91 9.28 270 119.80 70.35 69.29 68.57 62.04 28.50 54.45 36.09 30.50 31.78 11.81 10.75 10.03 300 126.72 74.44 73.25 72.47 68.62 31.63 60.00 39.84 27.50 35.56 13.31 12.13 11.34 330 139.20 82.46 81.15 80.28 75.34 34.75 65.55 43.60 30.00 39.34 14.44 13.13 12.25 365 154.24 87.08 85.64 84.67 81.21 38.50 72.03 47.99 33.50 43.75 15.81 14.38 13.41 402 170.17 91.17 89.57 88.51 89.29 42.44 78.96 52.69 37.00 48.48 17.56 15.97 14.91 445 187.22 98.92 97.17 95.98 98.48 46.88 86.83 58.02 40.00 53.83 19.25 17.50 16.31 490 206.17 105.14 103.20 101.92 108.21 51.63 95.15 63.66 44.00 59.50 20.94 19.00 17.72 542 228.42 117.24 115.09 113.68 119.56 57.13 104.86 70.24 49.00 66.12 23.56 21.41 20.00 600 252.50 124.56 122.19 120.63 132.00 63.13 115.50 77.45 54.00 73.37 25.81 23.44 21.88 SIZE L M R BH MAX MOTOR FRAME 122 18.50 7.31 9.00 0.44 184T 135 20.25 8.06 9.63 0.44 215T 150 20.25 8.81 10.50 0.44 215T 165 20.00 9.25 11.25 0.44 215T 182 24.75 10.88 12.13 0.44 256T 200 24.63 10.88 13.13 0.56 256T 222 23.88 11.13 14.75 0.56 256T 245 23.88 11.63 15.38 0.56 256T 270 26.13 12.13 16.63 0.56 286T 300 25.38 12.38 19.13 0.56 286T 330 28.88 14.13 20.63 0.56 326T 365 28.88 14.13 22.63 0.56 326T 402 30.00 20.88 24.38 0.81 286T 445 30.00 22.88 25.88 0.81 286T 490 30.00 25.38 28.38 0.81 326T 542 36.00 27.63 31.13 0.81 365T 600 36.00 30.63 34.63 0.81 365T 52 Twin City Fan Catalog 390

B 2.00.813 F A INSIDE SQ. J (K) BOLT HOLES SPACED @ 'L' Mixing Box OPTIONAL ISOLATION DAMPER HOUSING 11.96* C O.D. DISCH TO E D OUTSIDE SQ. F H G OPTIONAL BYPASS DAMPER LOCATION 2.75 TOP OF ROOF CURB DimensionalData A A 1. Isolation damper mount is 12.00" wide. Without damper subtract 12.00" from 'E'. 'A'-1 'A'-1 CURB DETAIL SECTION A-A SIZE A B C D E F G H J K L 122 26.00 30.35 13.25 26.48 28.93 13.24 11.50 16.10 30.14 5 5.50 135 27.00 32.85 14.56 27.48 29.43 13.74 13.50 16.60 31.89 5 5.75 150 29.00 34.85 16.19 29.48 30.43 14.74 14.50 17.60 33.89 6 5.00 165 30.00 35.85 17.75 30.48 30.93 15.24 15.00 18.10 34.89 6 5.20 182 32.00 37.85 19.50 32.48 32.36 16.24 16.00 19.10 36.89 6 5.60 200 34.00 39.85 21.38 34.48 33.36 17.24 17.00 20.10 38.89 7 5.00 222 36.00 41.85 23.75 36.48 34.35 18.24 18.00 21.10 40.89 7 5.33 245 39.00 44.85 26.06 39.57 35.80 19.78 19.50 22.60 43.93 8 5.00 270 41.00 46.85 28.50 41.57 36.97 20.78 20.50 23.60 45.93 8 5.29 300 44.00 49.85 31.63 44.57 39.41 22.28 22.00 25.10 48.93 9 5.00 330 47.00 52.85 34.75 47.57 40.91 23.78 23.50 26.60 51.93 9 5.38 365 51.00 56.85 38.50 51.57 42.97 25.78 25.50 28.60 55.93 10 5.22 402 55.00 60.85 42.44 55.57 45.91 27.78 27.50 30.60 59.93 11 5.10 445 59.00 64.85 46.88 59.72 48.92 29.86 29.50 32.60 64.01 12 5.00 490 64.00 69.88 51.63 64.72 51.42 32.36 32.00 35.13 69.01 13 5.00 542 70.00 75.88 57.31 70.72 54.42 35.36 35.00 38.13 75.01 14 5.08 600 76.00 81.93 63.13 76.72 57.42 38.36 38.00 41.18 81.01 15 5.14 660 82.00 87.93 69.38 82.72 60.55 41.36 41.00 44.18 87.01 16 5.20 www.tcf.com 53

TypicalSpecifications Model BAIFE Type BAIFE Induced Flow Exhaust Fans, where indicated on drawings and schedules, shall be of the nonoverloading design, and shall be of the size and capacity as indicated in the fan schedule. Induced flow exhaust fans shall be as manufactured by Twin City Fan and Blower, Minneapolis, Minnesota. Performance Performance ratings shall conform to AMCA Standard 211 (air performance) and 311 (sound performance). Fans shall be tested in accordance with ANSI/AMCA Standard 210 (air performance), 300 (sound performance) and 260 (induced flow fans) in an AMCA accredited laboratory. Fans shall be licensed to bear the AMCA certified ratings seal for induced flow sound and air. Sound certification shall apply to both inlet and outlet sound power levels. Fans shall be designed for maximum efficiency. Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to rise well beyond the efficiency peak to assure quiet and stable operation under all conditions. Horsepower characteristics shall be truly self-limiting and shall reach a peak in the normal selection area. HOUSING Housings are to be of heavy gauge, continuously welded construction. Housings with lock seams or partially welded construction are not acceptable. Housings shall be suitably braced to prevent vibration or pulsation. Fan housings shall have tapered spun, aerodynamically designed inlet cones or shrouds providing stable flow and high rigidity. Model BAIFE shall include outlet nozzle, windband, access door and drain with plug. Wheel Fan wheels shall be die-formed airfoil blade type, continuously welded to the rim and back plate, designed for maximum efficiency and quiet operation. Partial welding will not be acceptable on airfoil blades. Smaller sizes may use extruded aluminum blades. All BAIFE wheels shall be statically and dynamically balanced. The complete fan assembly shall be test balanced at the operating speed prior to shipment. Shaft Shafts shall be AISI 1040 or 1045 hot rolled steel, accurately turned, ground, polished, and ring gauged for accuracy. Shafts shall be sized for the first critical speed of at least 1.43 times the maximum speed. Bearings Bearings shall be heavy duty, grease lubricated, anti-friction ball or roller, self-aligning, pillow block type and selected for a minimum average life (AFBMA L-10) of 200,000 hours at the maximum fan RPM. Drive Motor sheaves shall be cast iron, variable pitch on applications 10 HP and smaller, and fixed pitch on 15 HP and larger. Drives shall be selected to provide a minimum 2.0 service factor. NOZ AND WINDBAND A nozzle and windband combination shall be provided to efficiently induce ambient airflow from outside the fan housing and increase discharge velocities to be a recommended minimum of 3,000 FPM without significantly affecting BHP requirements. The windband shall provide a minimum discharge height of between 84" and 120" from roof surface. OPTIONAL ACCESSORIES Where required the fans shall be provided with: AMCA "A", "B" or "C" spark resistant construction Modular mixing plenum box Bypass damper with actuator Isolation damper with actuator Disconnect switches Roof curb Vortex breaker Special coatings (Epoxy, Air-Dry Phenolic, Synthetic Resin) on airstream parts or entire unit Special materials of construction. FACTORY RUN TEST All fans prior to shipment shall be completely assembled and test run as a unit at operating speed or maximum RPM allowed for the particular construction type. Each wheel shall be statically and dynamically balanced in accordance with ANSI/AMCA 204-96 "Balance Quality and Vibration Levels for Fans" to Fan Application Category BV-3, Balance Quality Grade G6.3. Balance readings shall be taken by electronic type equipment in the axial, vertical, and horizontal directions on each of the bearings. Records shall be maintained and a written copy shall be available upon request. SUBMITTALS Submittals for approval of equipment shall include copies of outline drawings, AMCA Certified Ratings, and percentage pressure-volume performance curves showing point of operation. GUARANTEE The manufacturer shall guarantee the workmanship and materials for its BAIFE Induced Flow Exhaust Fans for at least three (3) years from shipment. 54 Twin City Fan Catalog 390

Model BCIFE Type BCIFE Induced Flow Exhaust Fans, where indicated on drawings and schedules, shall be of the nonoverloading design, and shall be of the size and capacity as indicated in the fan schedule. Induced flow exhaust fans shall be as manufactured by Twin City Fan and Blower, Minneapolis, Minnesota. Performance Fans shall be tested in accordance with ANSI/AMCA Standard 210 (air performance) and 300 (sound performance) in an AMCA accredited laboratory. Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to rise beyond the peak efficiency to ensure quiet and stable operation. Fans shall have a non-overloading design with self-limiting horsepower characteristics and shall reach a peak in the normal selection area. All fans shall be capable of operating over the minimum pressure class limits as specified in AMCA Standard 99. HOUSING Housings are to be of heavy gauge, continuously welded construction. Housings with lock seams or partially welded construction are not acceptable. Housings shall be suitably braced to prevent vibration or pulsation. Fan housings shall have tapered spun, aerodynamically designed inlet cones or shrouds providing stable flow and high rigidity. Model BCIFE shall include outlet nozzle, windband, access door and drain with plug. Wheel Fan wheels shall be single thickness plate type, continuously welded to the rim and back plate, designed for maximum efficiency and quiet operation. Partial welding will not be acceptable on backward inclined blades. All BCIFE wheels shall be statically and dynamically balanced. The complete fan assembly shall be test balanced at the operating speed prior to shipment. Shaft Shafts shall be AISI 1040 or 1045 hot rolled steel, accurately turned, ground, polished, and ring gauged for accuracy. Shafts shall be sized for the first critical speed of at least 1.43 times the maximum speed. Bearings Bearings shall be heavy duty, grease lubricated, anti-friction ball or roller, self-aligning, pillow block type and selected for a minimum average life (AFBMA L-10) of 200,000 hours at the maximum fan RPM. Drive Motor sheaves shall be cast iron, variable pitch on applications 10 HP and smaller, and fixed pitch on 15 HP and larger. Drives shall be selected to provide a minimum 2.0 service factor. NOZ AND WINDBAND A nozzle and windband combination shall be provided to efficiently induce ambient airflow from outside the fan housing and increase discharge velocities to be a recommended minimum of 3,000 FPM without significantly affecting BHP requirements. The windband shall provide a minimum discharge height of between 84" and 120" from roof surface. OPTIONAL ACCESSORIES Where required the fans shall be provided with: AMCA "A", "B" or "C" spark resistant construction Modular mixing plenum box Bypass damper with actuator Isolation damper with actuator Disconnect switches Roof curb Vortex breaker Special coatings (Epoxy, Air-Dry Phenolic, Synthetic Resin) on airstream parts or entire unit Special materials of construction. FACTORY RUN TEST All fans prior to shipment shall be completely assembled and test run as a unit at operating speed or maximum RPM allowed for the particular construction type. Each wheel shall be statically and dynamically balanced in accordance with ANSI/AMCA 204-96 "Balance Quality and Vibration Levels for Fans" to Fan Application Category BV-3, Balance Quality Grade G6.3. Balance readings shall be taken by electronic type equipment in the axial, vertical, and horizontal directions on each of the bearings. Records shall be maintained and a written copy shall be available upon request. SUBMITTALS Submittals for approval of equipment shall include copies of outline drawings, AMCA Certified Ratings, and percentage pressure-volume performance curves showing point of operation. GUARANTEE The manufacturer shall guarantee the workmanship and materials for its BCIFE Induced Flow Exhaust Fans for at least three (3) years from shipment. TypicalSpecifications www.tcf.com 55

Industrial & Commercial Fans Centrifugal Fans Utility Sets Plenum & Plug Fans Inline Centrifugal Fans Mixed Flow Fans Tubeaxial & Vaneaxial Fans Propeller Wall Fans Propeller Roof Ventilators Centrifugal Roof & Wall Exhausters Ceiling Ventilators Gravity Ventilators Duct Blowers Radial Bladed Fans Radial Tip Fans High Efficiency Industrial Fans Pressure Blowers Laboratory Exhaust Fans Filtered Supply Fans Mancoolers Fiberglass Fans Custom Fans Twin city fan & blower www.tcf.com TwinCity City FanFan Companies, Ltd. A Twin Company 1.5MWG4/12 5959 Trenton Lane N Minneapolis, MN 55442 Phone: 763-551-7600 Fax: 763-551-7601