SQUARE INLINE CENTRIFUGAL FANS

Twin City Fan INDUSTRIAL PROCESS AND COMMERCIAL VENTILATION SYSTEMS SQUARE INLINE CENTRIFUGAL FANS DSI BSI CATALOG 40 FEBRUARY 07

SQUARE INLINE CENTRIFUGAL FANS Overview DSI BSI Twin City Fan & Blower s Model DSI direct drive and Model BSI belt driven square inline fans are specifically designed for duct applications handling relatively clean air, including supply, exhaust and return air systems. These fans offer high efficiency and quiet operation in a compact design that can be mounted in any position (horizontal, vertical or angular). Duct collars are provided for easy mounting without the need for square to round duct transitions. The units can be easily serviced through the side access panels without removing duct connections. DSI Direct Drive Now Available with GridSmartTM EC Motors see page 8 Twin City Fan All DSI and BSI models are UL/cUL 70 listed, for electrical, File No. E8680. Twin City Fan & Blower certifies that the Models DSI and BSI shown herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication and AMCA Publication and comply with the requirements of the AMCA Certified Ratings Program. Square inline centrifugal units feature high efficient, nonoverloading, backward inclined centrifugal wheels precisely matched to a spun venturi. All wheels are statically and dynamically balanced. Units are manufactured under strict quality assurance standards to insure cataloged performance and years of maintenance-free operation. Square inline fans are not intended for outdoor applications. Typical Applications Include General HVAC (exhaust, filtration, return and supply, air of commercial buildings), Air Pollution Control, Airport Exhaust, Automotive, Fertilizer, Food & Beverage, Laboratory Exhaust, Metal & Mineral Processing, Office Exhaust, Restroom Exhaust, Warehouse Exhaust and Water Treatment Wheel Types Backward Inclined Optional Construction Spark Resistant Construction (Type B and C), Easy Access Construction Certifications AMCA Sound/Air and FEG, UL 70 Listed for Electrical, OSD Seismic Preapproval per OSP-07-0 Fan Efficiency Grade (FEG) certification applies to Model DSI Sizes A, AE, 0A, 0AE, 0AN, 0ANE, 6A, 6AE, 6AN and 6ANE and Model BSI, Sizes 080A, 090A, 00A, 0A, 0A, A, A, 0A, 0A, 6A, 6A, 80A, 80A, 0A, 0A, A, A, 4A, 4A, 70A, 70A, 00A, 00A, 0A, 0A, 6A, 6A, 40A, 40A. For complete product performance, drawings and available accessories, download our Fan Selector program at tcf.com. TWIN CITY FAN - CATALOG 40

SQUARE INLINE CENTRIFUGAL FANS Overview DSI BSI Model DSI Available in 0 sizes from 080 through 6 Airflow to,800 CFM Static pressure to " w.g. General HVAC (90 Degree Turn) Model BSI Available in 9 sizes from 080 through 40 Airflow to 7,400 CFM Static pressure to." w.g. General HVAC (Straight Inline)

CONSTRUCTION FEATURES Housings - Housing assembly features heavy-gauge galvanized steel construction Removable Side Panels - Removable side panels provide easy access for service and maintenance without the need to remove duct connections. Complete removal of the power assembly is also possible through side access panels. Side panels can provide a 90-degree side discharge. Requires optional side discharge accessory. Duct Collars - Duct collars provide ready attachment to ductwork and eliminate the need for square to round duct transitions. Belt Tube/Bearing Cover - Constructed of heavy gauge galvanized steel, the belt tube and bearing cover enclose the belts, fan sheave and bearings within the airstream (Model BSI). Drive Frame - Motor and drive frame are constructed of heavy gauge galvanized steel. The pivoting motor base makes for simple belt tensioning (Model BSI). Wheel - Backward inclined non-overloading, all-aluminum wheel and hub statically and dynamically balanced to assure long life and quiet operation. Mounting Brackets - Galvanized steel mounting brackets for easy mounting in horizontal or vertical position. Pulleys - Heavy-duty cast iron adjustable pulleys to permit speed variation (Model BSI). Shaft - Precision ground and polished with a first critical speed of at least % of the fan s maximum operating speed (Model BSI). Bearings - All models are furnished with prelubricated cast iron pillow block bearings with zerk fittings, designed for an average life (L-0) of 00,000 hours or more at maximum cataloged operating speeds (Model BSI). Disconnect Switch - Mounted and prewired NEMA disconnect switch provided as standard for servicing the unit without the danger of an accidental start. 4 TWIN CITY FAN - CATALOG 40

DISCONNECT SWITCHES Disconnect switches provide positive electrical shutoff during fan cleaning or maintenance. NEMA Disconnect Switch (Standard) A NEMA disconnect switch is available shipped loose for field mounting and wiring or factory mounted and wired with ODP or TEFC motors. NEMA Disconnect Switch NEMA R Disconnect Switch A NEMA R, rain proof, disconnect is available shipped loose for field mounting and wiring or factory mounted and wired externally. NEMA 4 Disconnect Switch A NEMA 4, water and dust tight, disconnect is available shipped loose for field mounting and wiring or factory mounted and wired externally. NEMA R Disconnect Switch NEMA 7/9 Disconnect Switch A NEMA 7/9 disconnect switch is recommended on fans with explosion proof motors. The NEMA 7/9 switch is designed for use with fans operating in hazardous environments. Available shipped loose for field mounting and wiring. (Not shown.) NEMA 4 Disconnect Switch DSI Direct Drive Twin City Fan

OPTIONS/ACCESSORIES 4 6 Belt Guard is a formed galvanized steel guard NEMA R rain proof safety disconnect switch is available to cover the drive assembly on Model BSI. available for positive electrical shutoff of the fan and Belt guard is offered in lieu of motor cover. the protection of service personnel. 4 Motor Cover is a formed galvanized steel cover available on Model BSI to completely cover the motor and drives. Motor cover serves as OSHA belt guard. Extended Lube Lines Exterior mounting zerk fittings are available with lines to the fan shaft bearings (Model BSI) for relubrication from outside the unit. Vibration Isolators Spring or neoprene type vibration isolators are available for ceiling suspended or floor mounted installations. 6 Backdraft Dampers, with automatic or motorized operation, feature felt-edged damper blades for quiet operation. Damper frames are constructed of galvanized steel and blades are constructed of 6-gauge aluminum. All dampers ship loose for field mounting in ductwork. Motorized dampers are recommended for low CFM applications to assure unrestricted airflow. Motorized dampers are available with, 08, 0, 460, 7 or 4 volt service. End switches are available. See dimensional data for sizing. 6 TWIN CITY FAN - CATALOG 40

OPTIONS/ACCESSORIES Variable Speed Control Variable speed control is Outlet Guard Inlet and outlet guards are available an optional accessory on all DSI models, to allow the for all models. Guards mount inside the unit and do adjustment of airflow for system balancing. Variable not interfere with the attachment of ductwork. speed controllers are solid-state (Tri-ac) design and are designed to start the motor on high speed for better startup characteristics. Variable speed controls can be shipped separately, factory installed, or field installed on the unit at a later date. Motor must be ODP V, PSC or shaded pole type. Filter Box Other Accessories Include: A filter box containing two inch aluminum Special Coatings wire mesh, removable and washable filters is available Insulated Housings for attachment to the fan inlet side. The filter box Aluminum Construction is constructed of galvanized steel, with duct collars Stainless Steel Hardware for easy mounting and removable side panels for NEMA 4 & 7/9 Disconnect Switches easy filter cleaning or replacement. Disposable paper filters are also available. One inch filters are available on either type. For filter box pressure drops contact factory. See page 6 for dimensional data. 7

ELECTRONICALLY COMMUTATED MOTORS Twin City Fan & Blower offers its own line of custom engineered Electronically Commutated (EC) motors. Electronic commutation is the latest motor technology to be used in direct drive fans. Also known in the industry as Brush Free or Brushless DC, the EC motors utilize an electronic circuit board to control the functionality of the motor. The motor operates off of single phase AC power, which is converted to DC power within the motor s circuitry. TCF has motor options available for V, 08-0V or 77V single phase electrical power. The result is a highly efficient motor, even at part load, with an expanded speed control range and a variety of speed control options from which to choose. EC motors are available in ODP, TENV and TEFC enclosures. GridSmartTM EC Motors Model DSI With GridSmart TM EC Motor Twin City Fan Benefits Efficiencies up to 8% Constant efficiency as the motor speed is varied Up to 66% energy savings over traditional PSC motors Performance range comparable to a belt drive fan with reduced maintenance benefits of a direct drive fan 80% usable turndown range as compared with 40% maximum on PSC motors Soft start gives fans smooth, quiet start Lower operating temperatures result in longer life and reduces energy consumption Heavy-duty ball bearings are permanently lubricated Elimination of VFD results in lower initial cost & GridSmart TM EC Motors /6 to GridSmart TM EC Motors EC Motor Options /6 to /6: V, single phase /4 : V, 08-0V, 77V, single phase ODP or TENV Enclosure Motor mounted speed control dial as standard 0-0VDC control leads as standard Available with remote mounted speed control dial & : V, 08-0V, single phase : 08-0V, single phase TEFC enclosure (totally enclosed fan cooled) Available with motor mounted speed dial or 0-0VDC control lead 8 TWIN CITY FAN - CATALOG 40

SIDE DISCHARGE OPTIONS Side discharge kits (including panels, mounting collars, and necessary hardware) are available to provide -way, -way, or -way discharges. This option provides exceptional adaptability for any installation, as well as avoiding the system effect of disrupted airflow when the ductwork has to take a 90-degree turn. Configurations RIGHT OPTION FIGURE CONFIGURATION Standard A Rear B Left -Way C Right D Left and Right -Way E Left and Rear F Right and Rear -Way G Left, Right and Rear NOTE: Performance will change depending on the position of the discharge. See correction factor table below. Percentages based on (inline) cataloged performance, but are not AMCA certified. Always check B when selecting motor and fan size. LEFT LEFT FIG. B INLET RIGHT INLET REAR LEFT FIG. C INLET INLET FIG. D FIG. E REAR REAR RIGHT REAR RIGHT INLET INLET LEFT INLET Fig. A FIG. F FIG. G Performance Correction Factors DISCHARGE 0.0" SP.00" SP.0" SP.00" SP AVG. CFM B CFM B CFM B CFM B CFM B -Way 0.7%.0% 4.0% 0.8%.8% 08.% 0.0% 0.%.% 08.7% -Way 4.7% 06.% 8.% 09.7% 0.%.4% 6.8% 4.0% 0.0% 0.7% -Way.% 0.9% 7.4% 09.7%.6%.0% 7.% 4.0% 9.8% 0.7% NOTE: The performance correction factors shown above are not licensed to bear the AMCA Certified Ratings Seal. Duct Openings LEFT AND RIGHT DISCHARGE REAR DISCHARGE/INLET MODEL MODEL DUCT COLLAR DUCT SIZE DUCT COLLAR DUCT SIZE BSI DSI WIDTH HEIGHT REQUIRED WIDTH HEIGHT REQUIRED 080 080.88.88 x.88.88 x 090 090.88.88 x.88.88 x 00 00.88.88 4 x 4.88.88 4 x 4 0 0.88.88 6 x 6.88.88 6 x 6 7.88 7.88 8 x 8 7.88 7.88 8 x 8 0 0 9.88 9.88 0 x 0 9.88 9.88 0 x 0 6 6.88.88 x.88.88 x 80.88.88 4 x 4.88.88 4 x 4 0 7.88 7.88 8 x 8 7.88 7.88 8 x 8.88 8.88 6 x 9 9.88 9.88 0 x 0 4 7.88.88 8 x.88.88 x 70 9.88.88 0 x 4.88.88 6 x 6 00 9.88 7.88 0 x 8 9.88 9.88 40 x 40 0.88 9.88 x 40 4.88 4.88 44 x 44 6.88 4.88 x 4 4.88 4.88 46 x 46 40 4.88 46.88 x 47.88.88 x NOTE: Damper size should be /8" less than duct size required, or same size as duct collar. 9

DSI 60 Hz EC MOTOR SIZE MTR 080AE /6 090AE /4 PSC MOTOR SIZE 080A MTR MAX. B /8 860 0.0 /8 60 0.0 /8 60 0.0 --- --- 70 0. 090A 00AE / 00A 0AE /4 0A ANE /4 AN AE, A 0ANE, 0AN 0AE 6ANE 6AE /8 860 0.0 /8 60 0.0 /8 60 0.4 --- --- 70 0.7 /8 860 0.04 /8 60 0. / 70 0.6 /8 860 0.07 /4 60 0.8 /4 70 0.6 /8 860 0.08 /4 60 0.0 /4 70 0.69 /4 860 0. / 60 0. * 70.07 /4 860 0. / 60 0. * 70. /4 860 0.0 / 60 0.0 0A 00 0. /* 70.7 ** 6AN /4 860 0. / 60 0.6 * 70.9 / 860 0. 60 0.8 6A 00.76 * --- 70.8 0 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00 CFM SONE 47 4..4 46 8 7.4 6. 6.. 60 8 4 0 49 40 0.4 0.4 8.7 8.0 8.6 8. 7. 68 6 87 0 0 46 40 0.9 0.9 9. 8.8 9.0 9. 8.0 49 90.9 4.4 668 9 0 40 9.8 8. 7.9 6.4 90 897 84 789 79 660 78.0.0. 0.. 0.7 8. 008 98 907 86 80 74 67.7.7...4.8 0.9 787 666 0 7.8 6.0 6. 06 97 88 780 6.. 0.0 0.9 9.0 60 4 484 44 6 0 6 08 877 7.8 7.8 7.6.9 4.7 4.8.6 4.9.7 047 9 80 86.8.. 4. 4 44 68 8 079 9 9. 9. 8. 7.7 8. 6.9 087 04 99 94 889 84 709 88 7.9 7.9 7.9 7.7 6.. 4.8.6 6. 4. 04 94 89 670 6.9 6... 404 4 6 070 96 8.4.4 9.6 8.4 9. 9. 7.9 8 07 04 974 9 867 808 68 4 40 0 899 7.8 7.8 7.8 7.8 6.9.7.4.9 6.6 4.8 4.6 4.6 Outlet Area:. ft 47 08 04 7. 6.7.9 6. 98 86 780 69 9 47 06.. 0.7 9.4 9.4 0.0 8.9 94 87 84 77 77 660 60 476 4 6 98 0 9.0 8. 9.4 9.6 7. Outlet Area:.90 ft 8 77 0 00 80 8. 7.9 6. 6.9.9 868 790 707 6 407 88 940.7.7. 0. 0..0.0 9. 88 767 7 66 606 49 488 9 077 9 7 0 9.6 8.6 8.0 9. 9.7 8. 7. Outlet Area:.90 ft 9 798 668 86 8. 8. 7. 7. 6.7 80 497 409 099 96 4....9..4. 0.0 669 89 04 44 7 09 74 0 0 0 0 9. 8. 7. 7. 8. 7.0 89 88 78 76 667 607 4 44 7 6 9 699 6 6 6 6 6 4 Outlet Area: 4.8 ft 094 9 80 647 47 48 7.7 7.6 6.9 7. 7. 7. 8 7 6 06 94 77 877 47.4.4.0.4.0..0.. 46 49 44 404 984 9 840 694 4 86 048 0 0 Outlet Area: 4.8 ft 898 68 499 069 77 0. 9.9 8.9 9. 9.4 8. 909 744 9 4 7 99 044 640 6. 6..6 4.7 4. 4.8.7.7. 0 49 480 4684 47 446 468 474 94 67 0 9 4 4 4 9. 9.8 898 786 678 74 47 7 8 09 494 4769 4 489 0 0 0 0 9 8 7 6 6 7 8 7 * Designates motors that cannot be used with speed controller. ** Performance available with 60 ECODP motors or EC Motor is an Electronically Commutated Motor. 70 ECTEFC motors. 60 maximum. PSC Motor is a Permanent Split Capacitor Motor.. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Performance ratings do not include the effects of appurtenances (accessories).. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0. 4. Values shown are for Installation Type B: free inlet hemispherical sone levels. FAN EFF. GRADE N/A N/A N/A N/A N/A FEG6 FEG FEG6 FEG60 FEG60 0 TWIN CITY FAN - CATALOG 40

BSI 080A Outlet Area =.7 ft Fan Efficiency Grade: FEG0 /4 / / /4 80 00 0 40 60 80 00 0 7 00 660 860 060 60 4 90 0. 0. 0.0 0.7.00..0.7.00..0.00 4 0.0. 6 0.0 4.6 0.0 4.7 49 6 0.04 6.6 0.04.9 0 4 49 0.06 9.0 0.07 7. 0.07 7. 84 4 47 44 0.09.0 0.0 9. 0.0 9. 0.0 7.8 664 67 470 0..8 0.4.0 0.4 9.9 0.4 0.7 0. 9. 744 70 64 74 49 76 0.8.9 0.8.8 0.9. 0.9. 0.9.7 0.8 0.6 8 79 70 669 604 46 0.4.6 0.4. 0..0 0.6.0 0.6 4. 0.6. 0.4. 87 84 784 76 667 99 6 90 0.8 6.8 0.8 6.8 0.9 4. 0.0.8 0.0 4.8 0.0. 0.0.0 0.7. 9 89 87 78 77 667 97 09 0. 8. 0. 8. 0.4 6.0 0.. 0..6 0. 6. 0..8 0.4 4. 984 97 904 8 80 748 689 60 4 0.9 0 0.9 0 0.40 8.4 0.4 6.7 0.4 6.4 0.4 8. 0.4 8. 0.4 6.8 0.4 6.0 06 07 988 940 89 84 79 77 67 97 0.48 0.49 0.0 0. 9.6 0. 8.6 0. 9. 0. 0 0. 0. 9. 0. 7. 9 6 070 0 980 9 889 84 789 70 76 0.9 6 0.9 6 0.6 0.6 0.6 0.64 0.6 0.6 0.6 0.64 0.6 9.4 7 9 09 067 0 98 99 894 84 79 9 0.7 9 0.7 9 0.7 9 0.74 0.76 4 0.77 0.77 0.78 4 0.79 0.79 0.77 0.7 8 60 8 77 7 097 07 06 97 9 8 708 0.8 0.8 0.84 0.86 9 0.87 6 0.88 0.89 4 0.90 0.9 6 0.9 7 0.9 6 0.87 44 4 8 46 07 69 09 0 0 96 8 0.94 0.9 0.97 0.98.00 0.0 8.0 7.0 7.04 7.0 9.0 9.0 6 MAXIMUM MOTOR FRAME SIZE: 4T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation Type B: free inlet hemispherical sone levels. Twin City Fan

BSI 090A Outlet Area =.6 ft Fan Efficiency Grade: FEG60 0. 0. 0.0 0.7.00..0.7.00..7. 40 7 697 6 0.09 9.0 0.09 8. 0.0 8.8 869 8 7 76 60 /4 0.. 0. 0.6 0.4 0. 0.4 0.9 80 984 944 84 748 608 0.8. 0.8. 0.9.0 0.0.8 0.0.4 0 079 04 96 87 764 66 0. 4.8 0. 4.8 0.. 0.6. 0.6 4.4 0..7 / 0 9 04 09 946 8 74 0 0.7.8 0.7.8 0.8 4.4 0.0.9 0.0 4.8 0.0 4.8 0.7. 0 0 68 099 0 9 8 70 0. 6.8 0. 6.8 0..9 0.4 4.7 0.. 0. 6. 0. 4. / 90 9 6 97 8 0 967 868 76 0.8 7.9 0.8 7.9 0.40 7.6 0.4 6. 0.4 6. 0.4 7. 0.44 7. 0.4 4.4 0 8 4 9 6 088 004 908 78 0.46 9.8 0.47 9.8 0.48 9.6 0.49 8.7 0. 7.9 0. 8.4 0. 9.4 0. 8.6 0. 6.0 /4 7 487 460 406 48 86 0 49 069 979 866 646 0.6 0.7 0.9 0.60 0.6 0 0.6 0 0.6 0.6 0.6 0.64 8.4 0.8 7. 90 9 66 46 406 47 8 40 06 96 0.69 0.69 0.7 0.7 4 0.74 0.76 0.78 0.79 4 0.79 4 0.79 0.78 060 669 646 98 47 49 440 8 9 78 097 86 0.79 6 0.80 6 0.8 6 0.8 6 0.8 0.87 4 0.88 4 0.90 4 0.9 0.9 6 0.9 0.87 0 70 78 68 6 8 4 480 4 6 96 4 0 0.90 8 0.9 8 0.9 8 0.9 8 0.97 7 0.99 6.0 6.0 6.04 7.0 8.0 8.04 4 MAXIMUM MOTOR FRAME SIZE: 4T BSI 00A Outlet Area =.0 ft 0. 0. 0.7 0.0 0.7.00..0.7.00..0 0 86 76 9 0.07 6.8 0.07 6. 0.07 6.9 0 98 899 806 7 /4 0. 9.9 0. 9. 0.4 8.7 0.4 9. 46 9 69 0 00 89 0.9. 0.0. 0.0. 0. 0.8 0.. 6 6 0 40 99 790 0..7 0.4.7 0..8 0.. 0.6. 0.6.7 / 64 94 4 8 090 94 0.7.0 0.8 4. 0.8.9 0.9. 0.0.9 0. 4. 7 467 47 64 08 84 08 8 0. 6.0 0. 6.0 0..4 0. 4. 0. 4.4 0..6 0.4 4.4 / 80 80 4 48 44 4 99 049 88 0.8 7.9 0.9 7.9 0.40 7. 0.4 6. 0.4. 0.4 6.7 0.44 7. 0.4 6. 980 697 64 60 6 46 9 077 8 0.47 9. 0.47 9. 0.48 9.0 0.49 8. 0. 7. 0. 7. 0. 8.8 0. 8. 0. 6.8 /4 0 8 78 74 699 609 0 40 8 894 0.7 0.8 0.9 0 0.60 0 0.6 9. 0.64 8.6 0.6 9. 0.66 0 0.6 9. 0.6 7.9 944 906 868 89 746 66 60 4 6 9 970 0.68 0.69 0.70 0.7 0.74 0.76 9.9 0.77 9.9 0.79 0.79 0.78 9.9 0.74 8. 70 046 0 97 98 860 777 689 9 489 7 6 999 0.79 4 0.80 4 0.8 4 0.8 4 0.8 0.87 0.89 0.9 0.9 0.9 0.9 0 0.8 9. 480 4 077 04 968 89 808 70 66 40 9 0.9 0.9 0.9 0.94 0.96 4 0.99.0.0.04 4.0.0 4.0 MAXIMUM MOTOR FRAME SIZE: 4T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. TWIN CITY FAN - CATALOG 40

BSI 0A Outlet Area =.67 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 700 76 489 0.04. 0.04.0 990 880 70 900 /4 0.08 6. 0.09 6.0 0.09.7 00 66 074 944 748 0. 9. 0.6 7.9 0.6 8.0 0.6 8. 0. 6.8 90 49 4 49 7 69 04 0.4.6 0. 0.9 0. 0.0 0.6 0. 0.6 0.8 0.6 0. / 78 09 49 67 8 7 0.7. 0.8.9 0.9 0.9 0.0 0.7 0.0. 0.0.6 40 660 9 8 46 87 9 040 0..6 0..0 0..8 0.4.6 0..7 0..4 0.4 0. / 79 7 670 607 4 47 7 0.9 4.9 0.40 4.9 0.4.9 0.4. 0.4.8 0.4.4 0.4.6 60 9 867 80 7 69 6 476 67 0.47 6.7 0.48 6.7 0.49.8 0.0 4. 0. 4. 0. 4. 0.. 0..9 /4 70 07 00 968 9 89 804 68 4 0 0.8 8.6 0.9 8.6 0.6 7.7 0.6 6.8 0.6.8 0.64.6 0.6 6.4 0.6 6.6 0.64 4.6 86 66 7 067 06 96 88 76 6 7 0.70 0.7 0.7 0 0.74 9.4 0.7 8. 0.76 7.6 0.78 7.6 0.79 8.7 0.79 8. 0.77. 9 6 80 86 7 089 990 877 7 7 8 0.80 0.8 0.8 0.8 0.86 0 0.87 9.4 0.90 8.9 0.9 9. 0.9 0 0.9 9. 0.86 6. 04 47 9 49 04 8 8 07 894 74 64 0.9 4 0.9 4 0.9 4 0.97 0.98 0.99.0 0.04.0.04.0 9.4 / 9 6 8 40 498 46 4 6 8 40 0 879 78. 6. 6.7 6.8 6.0..4.7.9.9 4.9 4.8 4 807 769 70 69 6 6 40 6 7 9 06.8 0.40 0.4 0.4 0.4 9.47 8.0 6...7.8 7.7 7 MAXIMUM MOTOR FRAME SIZE: 4T BSI 0A /4 / / /4 / 40 40 600 70 840 970 0 0 48 6 Outlet Area =.67 ft Fan Efficiency Grade: FEG 0.7.00..0.7.00..0.7.00..0 86 0. 7.6 9 70 0.6 0.7 0.4 9.6 00 8 0.0. 0.0 0.9 96 74 0.4.8 0.. 0. 0.8 49 978 0.4. 0.4.6 0.4. 78 7 46 004 0. 4.4 0. 4.4 0.. 0. 4. 44 8 9 0 0.6 6.9 0.6 6.0 0.64 6.4 0.64 6.6 0.6. 60 7 48 7 7 6 0.7 9. 0.77 8.0 0.78 7. 0.79 8.4 0.79 8. 0.77 7.0 7 68 60 09 40 87 0.86 0.88 0 0.90 9.0 0.9 9. 0.9 0 0.9 9.8 0.88 7.8 88 788 7 64 9 4 87 0.98 4.00.0 0.04 0.0.0.04.0 8.9 04 960 894 84 747 68 60 49 48 84. 7.. 4.7.8.9.0 4.9 4.8.9 87 8 067 00 98 866 784 69 98 0 84 06.46 0.49 9. 7. 6..6.8 6.8 6.8 6.7..4 MAXIMUM MOTOR FRAME SIZE: 4T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels.

BSI A /4 / / /4 / 900 07 0 90 80 70 46 6 640 70 84 970 Outlet Area =. ft Fan Efficiency Grade: FEG 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 86 68 0 894 0.4 8.0 0. 7. 0. 7.7 0. 6. 696 99 00 80 7 0..0 0.4 9.8 0. 9.4 0.6 0.0 0.6 9.8 79 700 607 0 6 9 0.7.8 0.8 0.8 0.9 0. 0.0 0. 0.0 0.9 0.9 9.6 897 80 7 69 67 0..6 0..0 0.4 0.9 0.4 0.9 0..7 0..4 0 97 890 807 76 60 9 0.9.9 0.40.4 0.4.4 0.4.0 0.4. 0.4.0 0.4 0.8 08 07 980 90 8 68 0.47.4 0.49.4 0.0 4.4 0.. 0.. 0. 4.0 0. 4. 70 0 8 086 00 88 9 0.8 7.0 0.9 7.0 0.6 6.0 0.6.0 0.6 4.8 0.64 4.8 0.6.8 0.64 4. 4 477 4 44 77 08 04 84 7 0.70 9.0 0.7 9.0 0.7 8. 0.7 7. 0.76 6. 0.77 6. 0.79 7. 0.79 7. 0.77 4.8 669 608 4 48 47 08 8 0.8 0 0.8 0 0.84 0 0.86 9. 0.87 8. 0.88 7.4 0.9 7.6 0.9 8.9 0.9 7.7 80 747 687 67 66 04 78 9 04 80 0.9 0.9 0.96 0.98.00 9.8.0 9..04 8.6.0 9.7.0 9.9.04 8. 07 96 908 8 79 78 6 00 0 6 946.4.6.8.0 4...7.9.0.9.8 8 78 7 07 0 969 86 7 6 484 0 0.9 7.4 7.4 7.4 7.47 6.49. 4..8 4.8.8 4.6 MAXIMUM MOTOR FRAME SIZE: 4T BSI A /4 / / /4 / 00 00 7 0 40 0 6 76 8 94 08 Outlet Area =. ft Fan Efficiency Grade: FEG 0. 0.0 0.7.00..0.7.00..0.7.00 6 899 0.6 8. 0.7 8. 6 97 0..4 0.4 9. 0. 9. 4 76 08 789 0.8.6 0.9 0. 0.0 0.8 0.6 9.7 0 87 9 007 0. 4.0 0.4. 0..7 0..0 6 9 90 06 966 0.40. 0.4. 0.4.4 0.44.0 0.4.6 780 668 46 9 0.49 7. 0..0 0..6 0. 4.4 0..9 9 8 70 7 4 7 0.9 9.0 0.6 7.4 0.6. 0.64. 0.6 6.0 0.64 4.6 0 99 88 747 6 47 8 0.7 0.74 9.7 0.76 7.6 0.77 6. 0.78 7. 0.79 7. 0.77. 69 079 98 88 767 6 47 86 0.8 0.8 0.87 9. 0.89 8.0 0.9 7.6 0.9 8.4 0.9 8. 0.87 6.4 8 97 07 0 90 788 646 0 94 0.94 4 0.97.00.0 9.4.04 8.6.0 9..0 9.9.04 9. 0.98 7.8 48 79 97 0 90 77 67 470.6 6.9 6. 4.4.6.8.9.0.9. 9.7 6 60 484 40 6 9 07 90 779 69 4.40 9.44 9.47 7.0 6. 4.4.6.7 4.7 4.7 4..4 MAXIMUM MOTOR FRAME SIZE: 4T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 4 TWIN CITY FAN - CATALOG 40

BSI 0A /4 / / /4 / 8 90 970 00 09 70 0 400 46 70 680 760 84 Outlet Area =.90 ft Fan Efficiency Grade: FEG 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 69 78 0.7 8. 0.8 7. 0.9 7.9 0.8 6.6 98 79 660 48 0.4 0. 0. 9. 0.6 8.7 0.6 9. 0. 7.7 0 97 79 646 444 0.8 0.9 0.9 9.9 0.0 9. 0.0 0. 0.0 9.8 040 9 798 66 40 0..7 0.. 0.4 0. 0. 0.7 0. 0.9 0. 9.8 6 6 006 874 70 0.9. 0.4.6 0.4. 0.4.4 0.44. 0.44.4 498 40 0 0 094 99 9 0.48 4.6 0.49 4. 0..0 0.. 0..9 0..4 0..7 68 9 00 407 04 9 0.8 6. 0.60.8 0.6 4.8 0.6 4.0 0.64.6 0.6 4. 0.6 4.7 876 79 707 60 440 09 898 0.70 8.0 0.7 8.0 0.74 7. 0.76.8 0.77. 0.78. 0.79 6.7 0.78. 04 944 86 780 697 6 46 47 77 0.8 8.8 0.8 8.8 0.8 8. 0.87 7. 0.88 6.8 0.90 6. 0.9 7. 0.9 7. 0.88 4.4 7 096 09 940 860 78 607 77 090 0.9 0 0.9 0 0.97 0 0.99 9.0.00 8..0 7.7.04 7.7.0 8.9.0 7. 409 9 67 9 0 046 894 7 48 06.4.6.8.0. 0.4 9.8.7 9.4.9.9.7 8.9 67 9 48 89 0 8 0 8 6 6.9.4.44.46.48 4.0.4.7.8.7.6 87 77 7 648 8 7 8 48 094 90 676 4.9 7.6 7.64 7.67 7.69.7 4.7.79.8 4.8.8 4.78 408 969 909 848 787 74 98 47 4 74 979 78.8 9.86 9.89 9.9 9.94 8.96 7.00.04.08.09 6.09 7.08 6 MAXIMUM MOTOR FRAME SIZE: 84T BSI 0A / / /4 / 90 40 0 0 4 0 8 660 780 900 99 090 Outlet Area =.90 ft Fan Efficiency Grade: FEG 0.0 0.7.00..0.7.00..0.7.00. 078 0.0 8. 0 6 0.4 0.4 0.4 0.8 68 48 6 0.4.9 0.4.0 0.4. 8 684 46 7 0..6 0..8 0..6 0.49.9 09 88 698 48 0.6.9 0.64 4.4 0.6 4.8 0.6 4. 0 067 94 7 0.7 7.8 0.77 6. 0.79. 0.79 6. 0.78.6 0 07 906 74 484 0.86 9.6 0.88 7.9 0.90 6.9 0.9 7. 0.9 7.6 0.88.6 468 0 4 078 90 7 444 0.98.0 9.0.0 8.0.0 8..0 9.0.0 7.8 0.97 6.6 679 70 47 89 0 848 6.0 4..6 0.8 9.4.9 0.0.9 9.9. 8.4 887 787 68 7 4 99 794.4 7.48..4.6.8.8.7. 0 00 96 88 76 648 7 87 079 889.67 9.7 7.74 6.77 4.79.8.8.8.8 4.77 0 9 8 78 607 469 4 7 99 7.9.9 9.99 8.0 6.0.07.09.0 6.0 6.09 6.04 4.86 4 MAXIMUM MOTOR FRAME SIZE: 84T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels.

BSI 6A / / /4 / 800 87 940 00 07 0 0 60 0 44 0 90 70 80 Outlet Area = 4.8 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 4 67 98 706 0.4 0. 0.6 9.0 0.7 7.9 0.6 8.4 46 74 079 809 0.. 0. 0.8 0. 9. 0. 9.4 0. 9.7 76 646 4 889 0.9. 0.4.8 0.4. 0.4 0. 0.4 0.9 0.4 0.7 968 86 74 60 44 8 0.47 4.9 0.49 4.4 0..0 0..8 0..7 0.. 88 090 98 864 76 6 7 0.7 6. 0.60 6. 0.6. 0.6.9 0.64. 0.6. 0.64.0 4 6 0 0 877 08 066 0.70 8. 0.7 8. 0.7 7.4 0.77.9 0.78.0 0.79 4. 0.79.0 0.76.8 9 0 49 09 787 9 0.80 9.4 0.8 9. 0.8 8.7 0.88 7.8 0.89 6. 0.90.7 0.9.8 0.9. 766 686 600 08 409 00 040 67 6 0.9 0.94 0.97 0 0.99 9.0.0 8..0 7..04 6.7.0 7.. 4046 97 89 80 7 67 40 9 77...8.. 0. 9.6.8 8..8 9..7 8.6. 6.9 44 47 400 44 404 96 774 9 9.7.40.4.46 4.49 4...7 0.7. 0. 8.0 47 408 4440 469 49 48 4049 84 6 0 007.9 7.6 7.66 7.69 7.7 6.7.79.8.8.8.8 4789 477 466 496 47 44 499 4 9 667 60 07.8 8.8 8.89 8.9 8.9 8.98 7.04.07 4.09. 4.08 4.06 44 087 07 4966 490 488 4699 447 477 484 946 68..7...8.4.48 0. 8.6 7.8 6.9 7.7 7 499 44 90 7 6 090 49 4807 4644 446 44.70 6.7 6.79 6.8 6.87 6.9 6.98 4.04.09. 9.4 9. 0 MAXIMUM MOTOR FRAME SIZE: 4T BSI 6A / /4 / 000 0 0 90 0 4 0 60 700 78 90 040 Outlet Area = 4.8 ft 0.7.00..0.7.00..0.7.00..0 60 0 0.7 9. 0. 8. 070 776 94 0. 0.6 0. 0.6 0.49 9.7 07 764 0.6. 0.6. 0.6 0. 64 4 088 78 0.78. 0.79.8 0.79.7 0.78. 74 06 09 6 0.88. 0.90.0 0.9.9 0.9.9 0.86.4 98 76 9 94 009 498.0 4.4.0.8.04 4..0 4..04.0 0.9.0 0 867 669 446 8 769.4 6.7.7..9..0 6..0.7.9 4.. 4.6 49 4 7 998 808 97 99.48 8.9. 7.0.4 6..6 6.8.7 7..7 7..6.7.49.7 70 67 4 0 077 890 684 44 099.69 0.74 8.9.77 7.9.79 7.4.8 8.0.8 8.6.8 8..8 6.7.7 6.8 96 80 660 09 0 8 000 80 7 4.94.99.0 9..06 8.9.09 8.9.0 9..0 9.6.0 9.0.09 7.9.0 8.0 489 469 404 907 766 68 464 99 98 697 8.9 6.4 4.0.4.7 0.9 0.6.6.6.6 0.9 9.7.49 9.7 4600 4489 47 40 4 988 849 704 88 4 00.84 8.9 7.97.0 4.0.08... 4.4 4.4. MAXIMUM MOTOR FRAME SIZE: 4T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 6 TWIN CITY FAN - CATALOG 40

BSI 80A / / /4 / 67 70 80 86 9 98 0 08 60 40 00 6 460 60 Outlet Area =.8 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 44 4 060 67 0. 9.0 0. 7. 0. 7.4 0. 7. 864 69 48 84 80 0.. 0.4 9. 0. 8. 0. 9.0 0.4 8.7 7 966 788 64 49 89 0.40.7 0.4.4 0.4 0. 0.44 9.6 0.4 0. 0.4 9.9 47 09 0 864 68 7 0.48.9 0.0. 0..6 0. 0.9 0..0 0.. 97 470 0 68 976 78 0.8.7 0.6. 0.6.7 0.64.4 0.6. 0.6. 84 78 60 48 9 00 8 0.70 7.0 0.7 7. 0.7.7 0.77 4.6 0.78.4 0.79.4 0.78.9 40 94 8 69 46 78 94 0.8 8.4 0.84 8.4 0.86 7. 0.89.9 0.90.0 0.9 4. 0.9.0 47 4 404 9 789 640 77 0.9 9.4 0.96 9.6 0.99 9.0.0 7.7.0 6.6.0.8.0 6.0.04.4 46 4469 467 49 44 40 709 77 89..6.9. 0. 9..7 8..9 7..8 8.. 6.6 489 480 470 46 407 494 47 809 87 99.7.4.44 4.48...6 9..7 9.6.6 9.. 8. 7 0 496 487 477 467 4440 464 789 96.7.6.6.69.7 4.7.79.8.80.79 0 40 9 06 4967 477 44 4 87 47.8 7.86 7.90 7.94 7.97 6.0.06.09.0.08.06 789 7 68 9 476 90 0 4997 478 446 4097 74. 0.6 0. 0. 0.9 9.4 9.49 7..6 4.7.. 69 66 60 98 906 88 66 480 77 047 476 44.70.74.79.84.88.9.00 0.06 9.0 8. 7. 8. 8 MAXIMUM MOTOR FRAME SIZE: 84T BSI 80A / /4 / 87 970 040 0 60 00 90 460 0 640 70 Outlet Area =.8 ft 0.7.00..0.7.00..0.7.00..0 7 0.9 8. 8 78 0. 0.4 0. 9.4 4 79 64 0.6. 0.66. 0.6 0. 79 49 4 0.78.8 0.79.6 0.78.0 0 79 4 98 0.89.7 0.9.4 0.9.0 0.88.9 7 974 69 4 778.0.6.04.6.0 4.4.04.7 0.96.7 49 07 799 468 9.4.4.6 4.7.8..8.7.8.8.7.8 88 676 46 9 94 640.49 7.4. 6.. 6.0.7 7.0.7 6.8.6.4.46.4 4 944 740 4 88 07 70 7.7 9..76 7.8.79 7.0.8 7..8 8..8 7..80 6.4.68 6.4 48 406 406 86 60 7 4 797.96.0 9..04 8..07 8.0.09 9..09 9.4.09 8..06 7.6.9 7. 4766 4608 448 48 4070 87 67 4 7 800 0.8 4.44.49. 0. 9.8.7 0.8.8 0.7 8.9.49 8.9.6 8.9 4 000 4847 468 4 48 4 9 740 07 6 84.86 6.9 4.99.04.08.0.....09.97 MAXIMUM MOTOR FRAME SIZE: 84T. Performance certified is for Installation Type AB Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 7

BSI 0A / / /4 / 0 60 67 70 770 8 86 90 970 040 090 40 0 Outlet Area = 7.8 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 80 08 09 0. 7. 0. 6. 0. 6.4 86 0 74 97 0. 0.0 0.4 8.4 0. 7.8 0. 8. 0 40 08 7 74 0.9. 0.4 9.9 0.4 8.8 0.4 9. 0.4 9. 8 6 96 09 70 0.47.7 0.0. 0. 0. 0. 9.9 0. 0. 4099 96 78 490 7 798 0.8 4. 0.60.4 0.6.6 0.64 0.8 0.64.4 0.6. 44 46 4080 877 6 04 0.70 6. 0.7. 0.76.9 0.78. 0.79. 0.79.8 464 4494 40 446 9 667 998 0.8 7. 0.84 6.8 0.87.4 0.89 4.0 0.9. 0.9.6 0.89.7 487 470 477 4408 4 99 76 0.9 8.6 0.96 8. 0.99 6.7.0.4.0 4.6.04 4..0.0 9 0 497 48 46 4468 977 8. 0.7 0.0 9.6. 8.0.6 6.8.7.9.8 6.7.6 6. 6 6 89 4 09 4949 470 40 44.8.4.47.0. 9.9.6 8..8 7.9.7 8.4. 7.6 97 804 68 9 44 79 4944 4497 967.9 4.6 4.68 4.7.7.78 0.8 9..8 0.80 9.6 698 609 978 860 7 60 99 499 44 9.8 6.86 6.90.9.99 4.0.06.08.07.04 0 667 676 647 666 6 6 87 7 00 479 48.4 8.9 8.4 8.9 8.4 7.47 6. 4.7.8.6. 7 70 69 686 67 666 69 6 8 48 00 47.70 0.7 0.8 0.86 0.9 0.9 9.0 7.09 6.. 6.0 6.07 4 MAXIMUM MOTOR FRAME SIZE: 84T BSI 0A / /4 / 700 80 86 9 970 0 090 6 0 80 70 46 Outlet Area = 7.8 ft 0. 0.0 0.7.00..0.7.00..0.7.00 66 66 0. 7. 0.4 7.4 08 86 8 0.49 0.0 0. 8.8 0. 9. 47 8 70 44 0.9. 0.6 0.0 0.64 0.6 0.6 9. 7 4 066 68 894 0.7.9 0.76.7 0.78.7 0.79.6 0.7 0.6 966 668 94 44 0.8 4.0 0.87.6 0.90. 0.9.0 0.89. 47 89 76 798 0 0.9 4.9 0.99.9.0.0.04.8.04.6 0.96. 4 467 98 668 6 89 64. 6.7..8.6 4..8 4..9..8..7. 4864 460 474 409 78 440 04 09.9 8..46 7.4. 6....7 6..8 6.4.6 4.8.4 4.4 4894 464 49 409 800 40 999.9 9.4.66 8.8.7 7.6.77 6.6.80 6.7.8 7..8 6.7.77. 87 78 49 47 4449 469 860 0 07.8.9.98 9.0.0 7.9.06 7.6.08 8..09 8.7.09 7..0 6.6 79 600 96 78 494 469 448 47 8 4 776...9.46 0.0 9..4 9.. 0.6 0.6 9.. 8.4.4 8.4 60 604 84 66 44 0 498 476 4466 47 80 6.70.80.89 4.97.0.07..... 9.8 9.9 MAXIMUM MOTOR FRAME SIZE: 84T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 8 TWIN CITY FAN - CATALOG 40

BSI A / / /4 / 40 0 60 600 640 68 70 70 80 86 90 90 0 08 8 8 Outlet Area = 8.0 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 8 784 0.. 0..7 407 78 008 0. 7. 0.4 7.0 0. 7. 484 994 8 870 0.40 8.7 0.4 8. 0.4 8.7 0.4 7. 4746 49 98 467 60 0.48 9.9 0. 8.9 0. 9. 0. 9. 0.49 8.0 0 478 446 98 46 0.8. 0.6 0. 0.6 9.9 0.6 0.7 0.6 9.7 0 488 409 406 00 0.7. 0.74. 0.77 0.9 0.79.6 0.79.6 0.77 0. 84 8 4896 406 404 0.8. 0.8.8 0.89.8 0.9.9 0.9.6 0.9. 6078 86 486 4448 0.9 4. 0.96.9 0.99.6.0.6.04..04. 660 664 609 8 8 90 4..6.9.6. 4..7.6.9.8. 4.6.9.9 708 686 666 676 606 8 48.9 6.8.44 6.8.49.9. 4.7.6 4.7.8..9.9..6 747 76 7044 68 664 697 69 49.6 7.9.67 7.9.7 7..76.8.79..8..86 6.9.8.9 787 769 74 79 696 674 66 00 486.8 8.4.89 8.4.94 8..99 6.9.0 6..06 6.0.0 7.4.0 7.7.0.6 8464 88 809 789 7689 747 6996 644 80 490.9 9.9. 9.9.4 9.9.46 9.0. 8.4. 7.8.6 7.9.6 9..64 9.. 7. 8980 8809 86 8448 88 808 769 7 6604 960 09.7.77.84.89.9 0.00 9.4.07 8.8. 0.. 0.96 8. 987 968 9 98 988 90 864 87 7794 797 679 606..9.66.7.78.84.94 4.0 0 4.07 4.0 4.07.97 069 00 0404 0 00 9944 96 96 888 8476 804 79 4.47 6 4. 6 4.6 6 4.70 6 4.77 6 4.8 4.9 4.0..9 4.. MAXIMUM MOTOR FRAME SIZE: T BSI A /4 / 7 78 80 860 90 98 0 08 60 40 470 Outlet Area = 8.0 ft 0.7.00..0.7.00..0.7.00..0 7 0.6 9. 88 68 0.79 0.8 0.76 9.7 6 986 0.9. 0.89 0.9 98 69 99.04.8.04.8 0.98. 44 97 7 7.6.6.8.4.6.9.. 499 40 98 446 8. 4.0.6 4..7 4.8..7.0.9 66 49 44 96 49.7.0.80.0.8 6.0.8.6.74 4. 606 06 49 446 9 8.99.9.0.8.09 6.8.09 7.0.06 6..9.4 608 88 7 0 4660 47 90.40 7.9.47 7.. 7..6 8.6.6 8.6. 7.6.4 6.9 66 687 66 86 47 498 480 4044 974.9 9.9.98 9..0 8.8. 9.7. 0. 0.09 9.6.00 8.6.67 8.0 778 76 697 6687 647 6069 6 8 490 48 466.7 4.8.90.98 4.0 4.08 4 4.08 4 4.06 4.0.9.8 80 790 770 7490 768 70 67 68 987 64 97 48 4.74 7 4.8 6 4.9 6.00.08..0 6. 7. 7.8 6..0 4 MAXIMUM MOTOR FRAME SIZE: T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 9

BSI 4A / /4 / 7 / 47 0 40 7 600 60 67 7 760 79 80 90 99 080 60 Outlet Area = 9.77 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 4748 49 69 0.4 8. 0.44 7. 0.44 7.6 097 4686 47 0.49 9.4 0. 8.0 0. 8.6 0. 7.8 00 9 4684 4 87 0.9 0. 0.6 9.4 0.6 9. 0.6 9.4 0.6 7.7 900 6 66 4690 4 0.70. 0.7 0.6 0.77 9.8 0.79 0. 0.78 9.9 68 864 498 070 44 946 0.79. 0.84.4 0.87 0. 0.89. 0.89.4 0.86 9.6 6 6 886 499 040 47 0.9. 0.97.7.00.8.0..0..0.7 707 67 64 6 79 7. 4.4.7.9..9...7.0.7. 78 74 706 676 644 606 7.7.8.44.8.49 4.4..8..8.7 4.7.6 4. 7974 776 748 708 6906 67 767 468.7 6.6.64 6..70.6.7 4.7.78 4..80 4.9.8.9.67.6 86 86 7898 764 764 709 64 06.79 7..87 7..9 6.9.98 6..0..0.6.08 6.8.04 6.0 8969 876 84 80 806 779 79 64 6.8 8..6 8.. 8.4.9 7.6.44 6.9.48 6.9. 7.7. 8.0.4 6.9 960 947 96 90 880 866 804 749 67 866.66 9.8.7 9.8.8 9.6.90 9.0.96 8.8.0 8..08 8.0. 9..0 9..97 8. 06 089 008 000 98 960 977 8680 809 744 6764.46.6.6.7.8.87 0.97 0 4.0 0 4.07 4.06.97 494 4 70 000 08 0644 09 98 968 884 844 769 4.4 4. 4.6 4.7 4.79 4 4.87.0.0.6.0.0. 67 0 068 9 7 89 44 087 0466 006 96 8986.4 8.6 8.67 8.77 8.87 7.96 7 6. 6 6. 6.4 6.40 6 6.4 7 6.4 8 8 047 906 76 64 46 47 8 4 06 0646 086 6.6 0 6.68 0 6.79 0 6.9 0 7.0 0 7. 0 7.0 9 7.46 8 7.8 8 7.66 8 7.7 8 7.78 0 MAXIMUM MOTOR FRAME SIZE: T BSI 4A / 7 / 60 70 780 8 87 9 980 00 0 4 4 Outlet Area = 9.77 ft 0.7.00..0.7.00..0.7.00..0 0.74 9.8 4 70.04.0.0 0.9 47 408 4.6.7.9... 7 4806 448 404...6 4.6.8 4..48.6 67 0 479 409.7 4..78.4.8 6.0.79.9 989 60 79 468 97.96..0 6.0.06 7..08 6..00 4.8 666 68 84 4 490 4.7 7..4 7.4. 8.6.4 9.. 8.0.46 6. 776 687 6 66 77 9 4667.87 9.8.96 8.9.04 9.7.0.. 0.06 8.6 800 774 740 74 688 647 607 8 4976.70 4.8.9.99 4.06 4 4.0 4. 4 4..98 888 866 800 807 774 744 7 6788 686 90 7 4.6 7 4.76 6 4.87 4.97.06. 6.9 8. 8. 7.8.0 4 97 9 9086 887 88 8 808 770 744 700 6698 66.6 0.78 0.9 8 6.04 8 6.4 8 6. 8 6. 0 6.8 0 6.4 0 6.4 6.44 9 6.7 7 04 0089 9860 968 994 94 890 8646 880 80 780 746 6.77 4 6.94 4 7.0 7.4 7.6 7.47 7.7 7.66 7.7 7.79 4 7.8 4 7.8 4 MAXIMUM MOTOR FRAME SIZE: T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 0 TWIN CITY FAN - CATALOG 40

BSI 70A / /4 / 7 / 7 40 40 480 00 6 60 6 66 70 760 80 900 96 00 Outlet Area =. ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 40 47 0.6 9. 0.8 7.0 89 6 4470 0.49.6 0. 8. 0. 8.7 687 89 40 477 0.60.6 0.64 0.4 0.6 0.0 0.64 8. 6874 690 76 04 0.7 4. 0.77.9 0.79 0. 0.79 0.6 796 6744 66 07 4690 0.8.0 0.86 4. 0.89. 0.89.8 0.87 9. 79 778 66 600 6 0.94 4.7 0.99..0..0..0.7 80 78 7409 6869 690 64.6 6.0. 6.0.6 4.8.8.4.9.9.7.8 886 89 80 769 740 678.4 7..47 7.. 7..6..8 4.8.8.6 9 900 86 8 7746 740 6008.6 8.7.69 8.7.7 9..79 6.9.8 6.0.8 6.4.79 4. 980 9498 966 8786 840 7867 6798.87 0.9 0.99 0.04 8.9.08 7..0 7..08 7.0 00 0 99 989 904 877 78 679.6..40.46. 9.9.4 9.0.6 0.0 7.0 78 0 0746 040 0 9746 89 7999 67.76.84.9.98.04.08.4..98 7.4 6 8 884 64 47 04 00 964 870 76.8 6.67 6.7 6.8 6.90 6.96 4.0 4 4.09 4.06 4.9 0 440 8 007 77 7 678 0994 08 948 8 4. 0 4.64 0 4.7 0 4.8 0 4.90 0 4.98 0.0 7.8 7. 9.8 8.09 4 449 44 4040 89 608 76 869 7 6 09 00 96.9.69.79.89.98 6.06 6. 6. 6.40 0 6.4 6.9 6. 8 47 4 066 487 4670 4460 40 499 96 07 67 0978 6.78 7 6.89 7 7.00 7 7.0 7 7.0 7 7.0 7 7.47 6 7.6 7.7 7.79 4 7.8 6 7.78 4 MAXIMUM MOTOR FRAME SIZE: T BSI 70A / 7 / 0 60 60 69 70 760 8 870 90 00 0 8 Outlet Area =. ft Fan Efficiency Grade: FEG60 0.7.00..0.7.00..0.7.00..0 97 0.64 7.7 4674.04 0. 444 4.9..8. 69 4.6.6.8..0. 66 94.80 4.0.8 4.4.8.4 70 6440 666 46.0 4.7.06.8.06 4..96 4. 7744 769 66 89 476.47 7.0. 7.0. 7...9.7 6.4 848 800 79 686 67 040.98 9.0.04 8.4.08 9.0. 8.8.07 7.7.88 8. 94 90 866 889 789 696 66.8.9.96 4.0 4.0 4.0 0.9 04 006 974 94 890 86 7784 784 676 4.8 6 4.9.0 4.06....08 4.88 8 0989 0666 040 9990 980 908 84 8004 774 69.87 9 6.0 8 6. 7 6.0 6 6. 6 6. 7 6.6 7 6.6 6 6. 6. 6.84 6 7 969 66 6 07 07 07 99 94 89 898 776 7. 7. 7.48 7.8 0 7.6 9 7.70 9 7.76 0 7.8 7.8 0 7.8 8 7.76 9 7.6 9 MAXIMUM MOTOR FRAME SIZE: T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels.

BSI 00A / 7 / 400 40 480 40 6 60 64 70 770 8 880 Outlet Area =.44 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 7 687 98 4778 0.68.9 0.7 0. 0.74 9.8 0.70 7. 860 804 76 67 478 0.96 4.9.0 4..04.4.0.8.0 9.0 948 8747 8 797 670. 6.8. 6.8..4.7..6.7 9988 9 8999 848 76 689.4 7..48 7...9.6 4..7 4.4..4 0 0088 960 9007 86 760.6 8..69 8..7 8.0.79..8..80. 0 066 088 96 904 8406 67.8 9..9 9..99 9..04 6.8.07.7.08 6.6.98.8 869 0 0 064 004 9 840.6.4.4.48 0. 8.. 7.7. 7. 698 60 994 9 6 060 9488 8.7.8.90.97.0 0.07 9.6.09 0.0 7.4 4040 79 48 074 700 7 6 074 909.6 6.7 6.8 6.89 6.97 6 4.0 4 4. 4. 4 4.0 0 74 4999 47 4406 408 79 90 00 06 988 4.60 8 4.7 8 4.8 8 4.90 8 4.99 8.07 8.9..4 7. 4 640 648 88 606 4 00 400 484 6 690 0607.64.76.87.97 6.07 6.6 6. 0 6.4 8 6.47 0 6.44 9 6.4 6 77 79 7046 679 6 647 66 499 49 0 4 49 6.8 4 6.9 4 7.07 4 7.9 4 7.0 4 7.40 4 7.9 7.7 7.8 7.8 7.8 7.7 0 MAXIMUM MOTOR FRAME SIZE: T BSI 00A / 7 / 90 0 90 60 60 700 74 80 880 94 00 Outlet Area =.44 ft Fan Efficiency Grade: FEG60 0.0 0.7.00..0.7.00..0.7.00. 7 0.40.6 6049 487.0 9.6.0 8.8 6697 66.4 0..6 0. 796 668 49.....4. 790 796 680 4.7.6.79.9.8.0.6. 8407 777 6876 807.00.4.0 4..09 4.4.04.6 9 8668 7984 7069 98.47 8..4.7.9 6.7.60... 9968 9440 887 807 78 967.9.04 7..09 7.6.4 8.0. 6..96 6.8 08 07 009 9480 874 79 694.7.87.94 9.4.99 0 4.04 0 4.0 8.6.89 9. 679 0774 04 98 88 80 684 4.7 4.89.00.06..7.7.08 4.7 7 77 6 90 464 09 04 960 897 799.77 8.98 8 6. 6 6. 6.8 6. 6 6.40 6 6.4 4 6.4 4 6. 47 78 86 997 60 88 70 046 988 9087 7869 6.97 0 7. 0 7.40 0 7. 7 7.6 7 7.68 7 7.7 8 7.8 8 7.8 8 7.78 6 7.66 6 7.8 7 MAXIMUM MOTOR FRAME SIZE: T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. TWIN CITY FAN - CATALOG 40

BSI 0A / 7 / 0 0 80 40 4 4 47 0 4 600 60 700 74 780 80 Outlet Area = 6.46 ft 0. 0. 0.7 0.0 0.6 0.7.00..0.7.00. 766 67 480 0.4 8.7 0.7 6.7 0..4 97 898 7994 68 0.96 4.0.0..0 0.7.0 9.9 0479 979 8908 7908 68.6.6. 4.9.6.9.6.. 9.4 4 07 9970 9088 808.4 7.6.49 7.6. 4.0.7.7.6. 96 4 064 989 89 788.6 8.7.70 8.7.76.7.79 4..79 4.8.76.4 48 946 8 00 977 8787.84 9..9 9..98 7.6.0.4.04.6.0. 477 987 48 779 06 0 86.6..4.49 7.. 6.8. 7..40. 446 40 9 94 90 88 999.74.84.9.00.0 8..08 8..0 8.0 600 606 76 4708 47 69 7 070.6.74.84.94 4.0 4.07 4. 4.06 0 740 707 66 640 79 86 47 898 44 4.60 8 4.7 8 4.8 8 4.94 8.0 8. 6... 879 848 808 777 744 698 90 486 67 0.7.8.98 6.09 6.0 6.0 0 6.4 7 6. 7 6. 8 6.4 0040 979 940 906 8707 89 746 6464 40 46 9 6.88 4 7.0 4 7. 4 7.8 4 7.40 4 7. 4 7.7 0 7.8 9 7.88 7.84 7.7 7 00 074 0407 0088 97 940 86 7707 678 697 48 86 7.88 8.0 8.7 8. 8.44 8.6 8.78 8.9 9.0 9.04 8.97 8.8 8 6 87 47 47 09 060 9907 9089 87 7 66 099 9.4 8 9.9 8 9.44 8 9.9 8 9.7 8 9.86 8 0. 6 0.0 0.4 4 0.0 0.49 6 0.4 4 MAXIMUM MOTOR FRAME SIZE: 6T BSI 0A / 7 / 0 440 00 0 90 60 690 74 800 8 900 940 Outlet Area = 6.46 ft Fan Efficiency Grade: FEG60 0.7.00..0.7.00..0.7.00..0 476.00 8.4 700 48.7 0.7.40 0. 778 69.8.4.78. 8 7.08..08.9 967 848 798.4 4.6.8.0..8 06 9686 87 77.07 6.4. 6.9.4..0.6 9 64 04 969 878.99 9. 4.0 8.7 4. 9.8 4. 7.7 4.0 7.8 6 77 98 08 0 90 4.97.06..9.9 9.8.08 0 48 84 8 64 87 09 9976 880 6.07 7 6. 4 6.9 6.6 4 6.4 4 6.4 6.4.98 96 08 47 409 4 67 787 090 9770 7. 9 7. 7 7.6 6 7.70 7.78 7 7.8 7 7.8 7.78 7.4 676 6084 60 48 9 9 86 74 00 87 8.46 8.69 8.84 8 8.9 7 9.0 8 9.0 9 9.6 9 9.6 7 9.08 6 8.87 7 8. 6 7440 6970 604 604 6 07 486 68 867 088 0 944 9.7 9.8 0.0 0. 0 0. 0 0.0 0 0.9 0.44 0 0.4 9 0. 8 0.4 9 9. 9 MAXIMUM MOTOR FRAME SIZE: 6T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels.

BSI 6A / 7 / 0 40 0 4 70 8 40 4 46 0 0 90 60 660 69 Outlet Area = 7.6 ft Fan Efficiency Grade: FEG 0. 0. 0.7 0.0 0.6 0.7 0.87.00..0.7.00 7 4 0.4 4. 0.4 4.0 04 94 8064 0.98 8.7.0 7.7.0 8. 407 049 97 788. 0.6.6 9..8 9.8. 8.7 06 98.48....7.0.7.6 94 9 7 04 8770.67..7..77.6.77.4.7.0 69 96 07 0 99.9 4..0.8.0.9.06.6.04. 477 40 68 48 78 0406.8.9.46.7. 4.. 4..6.4. 4. 87 8 49 866 049 08 096.89 7..99 7..06 6..0.6. 6.. 6.6.06.7 78 6779 68 48 487 4087 94 7.68 9.9.79 9.9.88 9.4.9 8.0.98 7.9 4.00 8. 4.00 9.0.94 7.9 8976 8469 797 774 6777 6 40 46 747 4.7 4.8 4.96.0. 9.9.4 9.7.6.7.0 8.8 04 997 9470 899 84 784 748 69 040 6.8.9 6.07 6.8 4 6.7 6. 6. 6.7 6.7 6. 0 870 4 0984 06 007 9 8977 8407 7 6 694 7.0 9 7.0 9 7.4 9 7.46 7 7.7 6 7.6 7.70 4 7.7 7.77 7.7 7.4 9 8 669 07 0 97 866 7 6 8.09 8. 8.40 8. 8.6 9 8.7 7 8.8 7 8.87 8.9 6 8.9 7 8.7 40 80 48 00 7 67 9 06 8996 76 608 9.4 4 9.60 4 9.76 4 9.90 4 0.04 0. 0. 9 0. 9 0.9 9 0.4 0 0.40 9 0.4 6 MAXIMUM MOTOR FRAME SIZE: 6T BSI 6A / 7 / 0 80 40 440 460 49 0 7 6 670 70 7 790 Outlet Area = 7.6 ft 0. 0.0 0.7.00..0.7.00..0.7.00 878 70.0 8.6. 8.9 974 847 6844.47.0.4 0..6 0.9 00 947 7646.67..7 0.9.80.0 089 979 897 6.90.7.99..04..8. 89 0869 969 80...46...6.6 4. 878 9 0907 96 846.8 7.9.00 4.6.07 4.6..4.09 4.9 4 9 04 8699..78 7.4.88 6.0.96 7.0 4.0 7.0.87 6. 9 4674 874 06 00 097 968 4.0 4.79 0 4.9 8..0 8..0 9.. 8.6.04 7. 676 964 04 444 98 604 99 0408.49 6.8 4 6.0 6. 0 6. 6.0 6. 6. 9. 8 78 6660 970 49 444 477 4 7 90 6.74 0 7. 8 7.4 7. 7.64 7.7 4 7.8 7.87 4 7.8 6.7 9074 866 767 7008 64 607 476 8 97 949 966 7.7 8. 8.47 8 8.6 6 8.76 8.86 8.97 7 9.04 7 9.08 6 8.99 4 7.74 4 00 94 8677 804 7406 674 99 9 49 446 48 07 8.80 9.7 4 9.6 9.86 9 9.99 8 0.09 8 0. 8 0. 0 0.6 9 0.4 7 0.8 6 8.9 6 MAXIMUM MOTOR FRAME SIZE: 6T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels. 4 TWIN CITY FAN - CATALOG 40

BSI 40A / 7 / 0 90 0 40 6 90 40 46 00 8 Outlet Area =.0 ft Fan Efficiency Grade: FEG 0. 0. 0.7 0.0 0.6 0.7 0.87.00...0.7 80 9898.0 8.6. 7.. 8. 87 708 9460.4 0.. 8.9. 9.4.47 8. 460 0 0 0677.67..74 0..76 0..74 0. 68 477 8 80 9946.90.4.98.4.0..0..90 0. 660 79 47 4 064. 4..4..48.7.0.4.47.4 788 704 646 7 9 447.8 6..94.8.0 4.7.04 4.6.0..98 4. 9870 96 847 749 640 4 40 74.76 9..89 9..99 7.6 4.0 6.7 4.07 7. 4.08 7.8 4.0 7.4.8.8 99 099 00 946 8644 774 6707 4 490 4.7 4.88 4.99 0.08 9.. 8.7. 9..6 0. 9.8 4.96 7.8 9 70 07 74 0649 987 90 806 697 788.86 4 6.0 4 6. 6.7 6.4 6.8 6.4 6.4 6.9 6.6 0 0 446 867 4 9 900 6 06 9476 848 6 7. 7 7. 7 7.48 7 7.6 7.7 4 7.78 7.8 7.8 7.87 7.84 4 7.4 6009 46 489 400 679 08 40 604 0804 99 7876 7.97 8 8. 8 8. 8 8.46 7 8.8 8.66 8.7 4 8.7 4 8.77 8.78 8.6 4 747 69 64 867 90 4689 4060 96 690 98 069 8 9. 0 9.0 0 9.68 0 9.84 0 9.98 8 0.09 7 0.7 6 0. 6 0. 6 0.7 7 0. 7 9.9 4 MAXIMUM MOTOR FRAME SIZE: 6T BSI 40A / 7 / 0 Outlet Area =.0 ft 0.0 0.7.00..0.7.00..0.7.00. 00 6 0.9 6.6 9. 9.6 70 9886 7706.74 0..7 0.7 90 08 899.0 0.8.07.0 40 046 87.0..7..40.4 44 74 7 00.9..04 4..07 4. 490 4984 808 7 077.90.7.99. 4.08 6.7 4.09 6. 0 69 6 40 888 8 4.88 8.7.00 7.. 7.7.7 8..4 7.8 70 89 748 69 490 8 7 6.00 6.8 9. 6.8 9. 6.9 0 6.4 0 6.8 9.0 60 9474 844 766 67 4 64 7.09 4 7. 7.4 7.7 7.67 7.7 7.6 0 640 087 994 9066 8 708 90 4747 78 8.0 8 8.6 4 8.77 8.88 9.0 4 9.09 4 9.4 8.9 670 960 097 07 947 849 74 68 69 98 9.4 0 9.8 7 0.0 0. 4 0.6 0.8 6 0.4 6 0.49 4 0.06 7 66 847 06 94 0488 97 8 7490 649 4 66..79.07 8. 8. 8.0 8.6 0.69 8.7 7.9 6 0.9 6 76 4 4774 40 0 8 8 09 0004 90 804 704 60.74 40 4. 6 4.6 4 4.87.0...44 4..9.9 0.0 0 MAXIMUM MOTOR FRAME SIZE: 6T. Performance certified is for Installation Type B: Free inlet, ducted outlet.. Power rating (B) does not include transmission losses.. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound ratings shown are loudness values in fan sones at.m ( ft.) in a hemispherical free field calculated per AMCA International Standard 0.. Values shown are for installation type B: free inlet hemispherical sone levels.

DIMENSIONAL DATA DISCONNECT SWITCH E 0.6 Model DSI, Direct Drive F H G AIRFLOW A D C SQ. DUCT COLLAR B SQ. MODEL DSI EC MOTOR SIZES A B C D E F G H DAMPER SIZE Notes:. All figures are in inches unless noted otherwise.. Average ship weight is for fan and motor assembly.. Dimensions are not to be used for construction. AVG. SHIP WT. (LBS.) SIDE DISCHARGE SIZE 080A 080AE 9.00..88.00 6.0 9.0 8.6.6.00 x.00 9.88 x.88 090A 090AE 9.00..88.00 6.0 9.0 8.6.6.00 x.00 96.88 x.88 00A 00AE 0.0 7.8.88.00 9.00.06 0.8 6.00 4.00 x 4.00 06.88 x.88 0A 0AE.0 9.8.88.00 0.00.06. 7.00 6.00 x 6.00 7.88 x.88 A/AN AE/ANE.00.6 7.88.00.0 4..9 9.6 8.00 x 8.00 7.88 x 7.88 0A/0AN 0AE/ANE 4.00.8 9.88.00.0 6.8.9. 0.00 x 0.00 7 9.88 x 9.88 6A/6AN 6AE/ANE 6.00 6.0.88.00 4.0 9.06 4.64 4.00.00 x.00 67.88 x.88 D-40J Filter Box Assembly SIZE A SQ. B C D E F FILTER FILTER AVG. SHIP SIZE QTY. WT. (LBS.) 080/090 6.00 8.0.88.44 8.8 47.8 x6x 99 00 8.06 0.6.88 9.88 6.7 47. x6x 0/0 9.6..88 4.0.8.88 x6x 48 /.7 4. 7.88 4.00.00.00 x0x 8 0/0.94 6.44 9.88.7.00 6.00 x0x 00 6/6 6.6 9..88 9.6 8.00 4.00 x0x 0 80/80 9..6.88 9. 6.0.00 x0x 0 0/0.44 4.94 7.88.00.00 6.00 x6x 4 90 / 4. 6.7 9.88 4.00.00 67.00 x6x 6 97 4/4 7.7 40..88 8.88 0.00 6.0 x0x x6x 49 70/70 40. 4.7.88.00.00 7.00 x0x 6 68 00/00 44. 46.7 9.88 4.00.00 74.0 x0x 8 64 0/0 48.94.44 4.88.0 4.00 79.0 x6x 84 6/6 0..7 4.88 9.7 0.0 77.8 x0x 80 40/40.0 8.00.88 4.7 6.00 88.00 x0x x6x 6 0 FAN ASSEMBLY REF ONLY (BSI SHOWN) FILTER BOX D-40- B A SQ. C SQ. DUCT ADAPTER AIRFLOW Notes:. All figures are in inches unless noted otherwise.. Filter box option is shipped separately for field installation.. For filter box information, see page 7. D E F 6 TWIN CITY FAN - CATALOG 40

DIMENSIONAL DATA Model BSI, Belt Driven OPTIONAL MOTOR COVER E OPTIONAL BELT GUARD F H J MAX G AIRFLOW A D C SQ. DUCT COLLAR B SQ. MODEL BSI A B C D E F G H J DAMPER SIZE AVG. SHIP WT. (LBS.) SIDE DISCHARGE SIZE 080A 9.00..88.00 6.0 9.0 8.6.6.00.00 x.00 9.88 x.88 090A 9.00..88.00 6.0 9.0 8.6.6.00.00 x.00 96.88 x.88 00A 0.0 7.8.88.00 9.00.06 0.8 6.00.00 4.00 x 4.00 06.88 x.88 0A/0A.0 9.8.88.00 0.00.06. 7.00.00 6.00 x 6.00 7.88 x.88 A/A.00.6 7.88.00.0 4..9 9.6.7 8.00 x 8.00 7.88 x 7.88 0A/0A 4.00.8 9.88.00.0 6.8.9..7 0.00 x 0.00 7 9.88 x 9.88 6A/6A 6.00 6.0.88.00 4.0 9.06 4.64 4.00 4.6.00 x.00 67.88 x.88 80A/80A 8.0 9.00.88.0 7.00.6.89 6.0 6. 4.00 x 4.00 9.88 x.88 0A/0A.00.4 7.88.0 0.0.06 7.4 0.00 6. 8.00 x 8.00 7.88 x 7.88 A/A 4.00 4.00 9.88.0.0 6.89 8.4.8 8.0 0.00 x 0.00 87.88 x 8.88 4A/4A 6.0 7.0.88.0.00 40.8 0.0. 8.0.00 x.00 7.88 x.88 70A/70A 9.00 40..88.0 7.0 4.00.4 7.88 0.00 6.00 x 6.00 94 9.88 x.88 00A/00A 4.0 44. 9.88.0 9.0 47.6.8 4.88 0.00 40.00 x 40.00 44 9.88 x 7.88 0A/0A 4.0 48.8 4.88.0 4.0. 6.9 46.6 0.00 44.00 x 44.00 4.88 x 9.88 6A/6A 48.0 0. 4.88.0 46.0.6 6.84 47.88 0.00 46.00 x 46.00 66.88 x 4.88 40A/40A.00..88.0 0.00 8.88 9.47. 0.00.00 x.00 74 4.88 x 46.88 D-40J Notes:. All figures are in inches unless noted otherwise.. Average ship weight is for fan and motor assembly.. Dimensions are not to be used for construction. Twin City Fan 7

TYPICAL SPECIFICATIONS Model DSI Supply or exhaust fans shall be of the direct drive model DSI centrifugal square inline type, as manufactured by Twin City Fan, Minneapolis, Minnesota. PERFORMANCE Performance ratings shall conform to AMCA Standard 0 (fan efficiency grade), (air performance) and (sound performance). Fans shall be tested in accordance with ANSI/AMCA Standard 0 (air performance) and 00 (sound performance) in an AMCA accredited laboratory. Fans shall be licensed to bear the AMCA certified ratings seal for both sound and air, and fan efficiency grade (FEG). Model DSI shall be UL 70 listed. CONSTRUCTION Unit exterior shall be constructed of heavy gauge galvanized steel. The fan housing shall be square in shape and readily attachable to building ductwork. Unit side panels shall be removable for easy access for maintenance and service. The power assembly shall be removable as a complete module through the side access panel. Fan housings shall have universal mounting brackets to accommodate horizontal or vertical installations. Fans shall bear a permanently attached nameplate displaying model and serial number of the unit for future identification. WHEEL Fan wheels shall be of the non-overloading centrifugal backward inclined type, constructed of aluminum and containing a matching inlet venturi for optimum unit performance. Wheels shall be statically and dynamically balanced. MOTOR Motors shall be of the heavy-duty ball bearing type, closely matched to the fan load. A disconnect switch shall be factory installed and wired to the fan motor as standard. All motors shall be UL recognized. ACCESSORIES When specified, accessories such as backdraft damper, belt guard, motor cover, insulated housing, vibration isolators, side discharge, remote lubrication lines, inlet and outlet guards, special coatings, and filter box option shall be provided by Twin City Fan to maintain one source responsibility. FACTORY RUN TEST All fans prior to shipment shall be completely assembled and test run as a unit at operating speed or maximum allowed for the particular construction type. Each wheel shall be statically and dynamically balanced in accordance with ANSI/AMCA 04-96 "Balance Quality and Vibration Levels for Fans" to Fan Application Category BV-, Balance Quality Grade G6.. Balance readings shall be taken by electronic type equipment in the axial, vertical, and horizontal directions. Records shall be maintained and a written copy shall be available upon request. GUARANTEE The manufacturer shall guarantee the workmanship and materials for its DSI Square Inline Fans for at least one () year from startup or eighteen (8) months from ship date, whichever occurs first. Twin City Fan 8 TWIN CITY FAN - CATALOG 40

TYPICAL SPECIFICATIONS Model BSI Supply or exhaust fans shall be of the belt driven model BSI centrifugal square inline type, as manufactured by Twin City Fan, Minneapolis, Minnesota. PERFORMANCE Performance ratings shall conform to AMCA Standard 0 (fan efficiency grade), (air performance) and (sound performance). Fans shall be tested in accordance with ANSI/AMCA Standard 0 (air performance) and 00 (sound performance) in an AMCA accredited laboratory. Fans shall be licensed to bear the AMCA certified ratings seal for both sound and air, and fan efficiency grade (FEG). Model BSI shall be UL 70 listed. Fans shall bear a permanently attached nameplate displaying model and serial number of the unit for future identification. CONSTRUCTION Unit exterior shall be constructed of heavy gauge galvanized steel. The fan housing shall be square in shape and readily attachable to building ductwork. Unit side panels shall be removable for easy access for maintenance and service. The power assembly shall be removable as a complete module through the side access panel. Fan housings shall have universal mounting brackets to accommodate horizontal or vertical installations. WHEEL Fan wheels shall be of the non-overloading centrifugal backward inclined type, constructed of aluminum and containing a matching inlet venturi for optimum unit performance. Wheels shall be statically and dynamically balanced. SHAFT Fan shafts shall be precision ground and polished. Shafts shall have a first critical speed of at least % of the fan s maximum operating speed. BEARINGS Bearings shall be of the one-piece, pillow block type with relubricable zerk fittings. Bearings shall be designed for air handling service with a minimum L-0 life in excess of 00,000 hours; L-0 00,000 hours at the maximum cataloged operating speed. Bearing mounting plate shall have self-aligning tabs for exact locating and alignment of bearings. DRIVE Drives shall be sized for a minimum of 0% of driven horsepower. Machined, cast iron motor sheaves shall be adjustable for final system balancing. The belt and pillow block ball bearings shall be protected from the airstream by an enclosure. MOTOR Motors shall be of the heavy-duty ball bearing type, closely matched to the fan load. A disconnect switch shall be factory installed and wired to the fan motor as standard. Motor shall be mounted on the outside of the unit, isolated from the airstream. All motors shall be UL recognized. ACCESSORIES When specified, accessories such as backdraft damper, belt guard, motor cover, insulated housing, vibration isolators, side discharge, remote lubrication lines, inlet and outlet guards, special coatings, and filter box option shall be provided by Twin City Fan to maintain one source responsibility. FACTORY RUN TEST All fans prior to shipment shall be completely assembled and test run as a unit at operating speed or maximum allowed for the particular construction type. Each wheel shall be statically and dynamically balanced in accordance with ANSI/AMCA 04-96 "Balance Quality and Vibration Levels for Fans" to Fan Application Category BV-, Balance Quality Grade G6.. 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. GUARANTEE The manufacturer shall guarantee the workmanship and materials for its BSI Square Inline Fans for at least one () year from startup or eighteen (8) months from ship date, whichever occurs first. 9