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

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

2 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. E 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

3 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. 3

4 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

5 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 5

6 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

7 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. 7

8 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

9 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 Mixing Box Weights SIZE BOTTOM INTAKE (LBS.) SIDE INTAKE (LBS.) 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 Windband Weights SIZE WINDBAND (LBS.) 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 SDB 1 SDB 1 SDB 1 HDB (SDB) 1 SDB 1-3/16 SDB SDB 1 SDB 1 SDB 1 HDB 1 SDB 1-3/16 SDB SDB 1 SDB 1 SDB 1-3/16 HDB (SDB) 1 HDB 1-3/16 HDB (SDB) SDB 1 SDB 1 SDB 1-3/16 HDB 1 HDB 1-3/16 HDB (SDB) /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 /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 /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 /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 /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) /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 /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 /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 /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 /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 /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 /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 /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 /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. 9

10 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 Table 5. Arr. 4 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV 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 Table 7. Arr. 10 BAIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV Twin City Fan Catalog 390

11 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 Table 9. Arr. 4 BCIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV Table 11. Arr. 9 BCIFE Bare Fan Weights (Lbs.) Table 10. Derating Factors For High Temperature (BCIFE Only) CLASS CLASS TEMP I II CLASS I CLASS II CLASS III SIZE LV MV HV XV LV MV HV XV LV MV HV XV BCIFEWeights Table 12. Arr. 10 BCIFE Bare Fan Weights (Lbs.) CLASS I CLASS II SIZE LV MV HV XV LV MV HV XV

12 PerformanceData 122 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 12 Twin City Fan Catalog 390

13 HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 13

14 PerformanceData 135 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 14 Twin City Fan Catalog 390

15 HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 5" SP 6" SP 7" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 15

16 PerformanceData 150 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 16 Twin City Fan Catalog 390

17 HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 4" SP 6" SP 8" SP 10" SP 12" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 17

18 PerformanceData 165 BAIFE LV (Low Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 18 Twin City Fan Catalog 390

19 HV (High Velocity Nozzle) 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² 0.5" SP 1" SP 2" SP 3" SP 4" SP 6" SP 8" SP 10" SP % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 19

20 PerformanceData 182 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.20 ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 20 Twin City Fan Catalog 390

21 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 21

22 PerformanceData 200 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.08 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.43 ft² Nozzle Outlet Area: 1.08 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.08 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 22 Twin City Fan Catalog 390

23 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 23

24 PerformanceData 222 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 1.78 ft² Nozzle Outlet Area: 1.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 24 Twin City Fan Catalog 390

25 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 25

26 PerformanceData 245 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 2.15 ft² Nozzle Outlet Area: 1.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 26 Twin City Fan Catalog 390

27 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.07 ft² Nozzle Outlet Area: 1.07 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.07 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 27

28 PerformanceData 270 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 2.62 ft² Nozzle Outlet Area: 1.96 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 28 Twin City Fan Catalog 390

29 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.31 ft² Nozzle Outlet Area: 1.31 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.31 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 29

30 PerformanceData 300 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1402 Max Class III RPM = 2294 Windband Outlet Area: 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.42 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 3.23 ft² Nozzle Outlet Area: 2.42 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.42 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 30 Twin City Fan Catalog 390

31 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² Nozzle Outlet Area: 1.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 31

32 PerformanceData 330 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1275 Max Class III RPM = 2085 Windband Outlet Area: 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) Nozzle Outlet Area: 3.91 ft² Nozzle Outlet Area: 2.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 2.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 32 Twin City Fan Catalog 390

33 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² Nozzle Outlet Area: 1.96 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.96 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 33

34 PerformanceData 365 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 1071 Max Class III RPM = 1760 Windband Outlet Area: 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 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 3.59 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 4.78 ft² Nozzle Outlet Area: 3.59 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 3.59 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 34 Twin City Fan Catalog 390

35 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 2.39 ft² Nozzle Outlet Area: 2.39 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.39 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 1.19 ft² Nozzle Outlet Area: 1.19 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.19 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 35

36 PerformanceData 402 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 971 Max Class III RPM = 1596 Windband Outlet Area: ft 2 Wheel Dia.: 40.25" Max Class II RPM = 1258 Tip Speed FPM = x RPM Nozzle Outlet Area: 5.82 ft² Nozzle Outlet Area: 5.82 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 4.36 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 5.82 ft² Nozzle Outlet Area: 4.36 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 4.36 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 36 Twin City Fan Catalog 390

37 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 2.91 ft² Nozzle Outlet Area: 2.91 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.91 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 1.45 ft² Nozzle Outlet Area: 1.45 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.45 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 37

38 PerformanceData 445 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 878 Max Class III RPM = 1444 Windband Outlet Area: ft 2 Wheel Dia.: 44.50" Max Class II RPM = 1138 Tip Speed FPM = x RPM Nozzle Outlet Area: 7.11 ft² Nozzle Outlet Area: 7.11 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 5.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 7.11 ft² Nozzle Outlet Area: 5.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 5.33 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 38 Twin City Fan Catalog 390

39 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 3.56 ft² Nozzle Outlet Area: 3.56 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.56 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 1.77 ft² Nozzle Outlet Area: 1.77 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 1.77 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 39

40 PerformanceData 490 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 797 Max Class III RPM = 1311 Windband Outlet Area: ft 2 Wheel Dia.: 49.00" Max Class II RPM = 1033 Tip Speed FPM = x RPM Nozzle Outlet Area: 8.62 ft² Nozzle Outlet Area: 8.62 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 8.62 ft² Nozzle Outlet Area: 6.47 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 40 Twin City Fan Catalog 390

41 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 4.32 ft² Nozzle Outlet Area: 4.32 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 4.32 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 2.15 ft² Nozzle Outlet Area: 2.15 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.15 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 41

42 PerformanceData 542 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 720 Max Class III RPM = 1184 Windband Outlet Area: ft 2 Wheel Dia.: 54.25" Max Class II RPM = 933 Tip Speed FPM = x RPM Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 7.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: 7.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 7.93 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 42 Twin City Fan Catalog 390

43 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 5.29 ft² Nozzle Outlet Area: 5.29 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 5.29 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 2.64 ft² Nozzle Outlet Area: 2.64 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 2.64 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 43

44 PerformanceData 600 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 651 Max Class III RPM = 1071 Windband Outlet Area: ft 2 Wheel Dia.: 60.00" Max Class II RPM = 844 Tip Speed FPM = x RPM Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: 9.69 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: 9.69 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: 9.69 ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 44 Twin City Fan Catalog 390

45 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² Nozzle Outlet Area: 6.47 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 6.47 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 3.22 ft² Nozzle Outlet Area: 3.22 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.22 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 45

46 PerformanceData 660 BAIFE LV (Low Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV7 (Low Velocity Nozzle) Wheel Type: Airfoil Max Class I RPM = 592 Max Class III RPM = 973 Windband Outlet Area: ft 2 Wheel Dia.: 66.00" Max Class II RPM = 767 Tip Speed FPM = x RPM Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % LV5 (Low Velocity Nozzle) MV7 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % MV (Medium Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: ft² Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % % MV5 (Medium Velocity Nozzle) Nozzle Outlet Area: ft² % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 46 Twin City Fan Catalog 390

47 HV (High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % % % % HV7 (High Velocity Nozzle) Nozzle Outlet Area: 7.83 ft² Nozzle Outlet Area: 7.83 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % % PerformanceData HV5 (High Velocity Nozzle) XV (Extra High Velocity Nozzle) % % % % % % % % % % % % % % % % % % % % % % % % % XV7 (Extra High Velocity Nozzle) Nozzle Outlet Area: 7.83 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % % Nozzle Outlet Area: 3.90 ft² Nozzle Outlet Area: 3.90 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % XV5 (Extra High Velocity Nozzle) Nozzle Outlet Area: 3.90 ft² % % % % % % % % % % % % % % % % % % % % % % % % % % Class III = Dark Blue section 47

48 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 K L LV, MV, CLASS I SIZE LV7, MV7 LV5, MV5 CLASS III HV, XV & II M R BH Twin City Fan Catalog 390

49 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, XV 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, XV T 215T T 256T T 256T T 256T T 286T T 326T T 326T T 326T T 365T T 365T T 365T T 405T T 405T T 405T T 405T T 405T T 405T T 405T 49

50 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 T T 184T T 184T T T 215T T T 215T 256T T T 256T T T 256T T 256T T T 286T T T 286T T T 326T T T 326T Twin City Fan Catalog 390

51 CG O.D. Arrangement 4 'LN' 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

52 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, XV SIZE L M R BH MAX MOTOR FRAME T T T T T T T T T T T T T T T T T 52 Twin City Fan Catalog 390

53 B F A INSIDE SQ. J (K) BOLT HOLES '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

54 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 "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

55 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 "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 55

56 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 TwinCity City FanFan Companies, Ltd. A Twin Company 1.5MWG4/ Trenton Lane N Minneapolis, MN Phone: Fax:

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