Bulletin BCF 103 DESIGN 10A BACKWARD INCLINED WHEELS

Bulletin BCF 10 DESIGN 10A BACKWARD INCLINED WHEELS

Proven Reliability in Industrial Environments and Corrosive Atmospheres Design 10A s with Backward Inclined Wheels Chicago s Design 10A is a rugged multi-purpose centrifugal fan equipped with Backward Inclined wheels suited for harsh duty applications. With heavier blades to resist erosion and corrosion, the Design 10A fan provides reliable operation in contaminated air with minimal maintenance. Similar BI wheels are used in Chicago s SQB fans for alternate duty applications. For clean airstreams, Chicago s airfoil bladed fans are recommended. Thirteen Sizes to 7" Volumes to 125,000 CFM Pressures to 0" WG Arrangements 1,, 9, 9H Construction Classes II, III, IV Temperatures to 00 F APPLICATIONS Chicago s backward inclined blades are designed to handle corrosive or dusty airstreams. Typical applications include oven circulators, dust collectors, fume exhausters and emission control systems. The Design 10A is also suited for high temperature airstreams to 00 F. The solid steel blades are ideal for custom applied corrosion resistant coatings. QUALITY Design 10A fans are built under Chicago Blower s strict Industrial Quality standards, the same standards as those used on Chicago s custom engineered fans, to assure exceptional performance and reliability. For application assistance, Chicago Blower representatives are located throughout North America and around the world. 2

Chicago Blower s wheels feature backward inclined solid steel blades continuously welded to a streamlined wheel cone and heavy steel backplate. The fans can withstand temperatures to 00 when used in conjunction with a shaft cooler and shaft seal. These wheels have true non-overloading horsepower characteristics, mechanical efficiency over 0% and a steep stable pressure curve, ideal for applications with pressure variations. Should actual system pressure reach 0% higher than the pressure anticipated, delivered volume of the Design 10A would be typically reduced by only 10%. DESIGN 10A Greater Efficiency More Economical Chicago s D/10A performs reliably in many installations that traditionally use radial bladed fans. Backward inclined blades are more efficient than radial blades, allowing the use of smaller, lower horsepower motors properly sized for the fan s operating horsepower. All classes of Chicago s BI fans exceed AMCA performance standards. CLASS II Meets specifications for most general industrial applications. Features heavy gauge housings with continuously welded scroll. Sizes to 7 for pressures through 12". Refer to Chicago s SQB fan for smaller sizes. CLASS III Same rugged construction as Class II with additional housing bracing and wheels reinforced with a stiffener ring. s are equipped with heavier shafts and bearings. Sizes to 0 for pressures through 14". Refer to Chicago s SQB for smaller sizes. CLASS IV Still heavier gauge housings, shafts, bearings and two wheel stiffener rings. Class IV D/10A fans are practical alternatives for installations where less efficient radial blades were considered necessary. Sizes to for pressures through 24". Chicago Blower Corporation certifies that the Design 10A s shown or herein are licensed to bear the AMCA Seal. The ratings shown are based on tests and procdures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.

INLET VOLUME CONTROL When the fan is used for varying or partial load applications, the Inlet Volume Control (IVC) provides precise air control and more efficient operation. Adjustable guide vanes prespin the incoming air in the same rotation as the wheel to produce the desired volume of air at the exact pressure. Vanes are mounted entirely within the inlet cone. Automatic control is achieved by adding an electric or pneumatic actuator. The IVC is suitable for manual operation to 50 F and automatic operation to 50 F. PUNCHED FLANGED INLET/OUTLET Formed ring inlet is punched for inlet duct connection. Heavy angle flange can be welded to the outlet, either punched or unpunched. INLET COLLAR Inlet connection collar is available for slip connection to ductwork or a flexible joint. INLET SCREEN The welded steel wire protective screen mounts within the inlet cone or outside the Inlet Volume Control, when furnished. SHAFT SEAL A non-contact seal mounted between steel plates reduces leakage through the shaft opening in the housing. OUTLET DAMPERS Dampers offer an economical alternative to IVCs. However, they require substantially more horsepower at reduced air volume. Dampers for all fan classes have double thickness airfoil blades, and are available with parallel or opposed blade rotating louvres. Dampers have punched flanges on both ends and are suitable for manual or automatic operation. A matching punched flanged outlet is required for mounting. Alternate construction is available for dirty or high temperature applications. EXTENDED GREASE FITTINGS Grease fittings allow for external lubrication without removal of shaft and bearing guard. SHAFT COOLER AND GUARD Cast aluminum cooling wheel with expanded metal guard raises the allowable temperature limit for arrangement 1 or 9 fans from 00 F to 50 F. Adding a shaft seal on arrangement 1 fans extends the limit to 00 F. Refer to page for high temperature/rpm deration factors. 4

SHAFT AND BEARING GUARD The expanded metal guard encloses the shaft and bearings. For easier lubrication, extended grease fittings are recommended. BELT GUARD Three sides are fully enclosed with expanded metal on the fourth side for ventilation and visual inspection. Easily removed for drive servicing. ACCESS DOOR The flush mounted door features quick opening tension clamps with neoprene gasket to 00 F and asbestos-free gasket to 00 F. PLUG TYPE ACCESS DOOR Bolted, round door is raised 4" off the scroll to provide clearance for insulation and includes an asbestos-free gasket. HOUSING DRAIN A half coupling is welded to the lowest point of the housing. Available with or without drain plug. INLET BOX The bolt-on inlet box simplifies ductwork connection when a straight horizontal connection is not feasible. Assures dependable fan performance when a sharp turn is required at the fan inlet. Performance and Convenience Options SPLIT HOUSINGS To facilitate wheel removal, fans can be furnished with horizontal split housings. Housing splits are caulked and bolted when the fan is shipped assembled. Split housings are standard on Sizes and above. SPARK RESISTANT CONSTRUCTION AMCA Type C spark resistant construction substitutes an aluminum inlet cone and adds a drive side aluminum buffing tube between the wheel, shaft and housing. Available with all classes and sizes, arrangement 1 and 9, Maximum temperature is 00 F. Not available when the fan is equipped with an IVC. Requires customer to electrically ground fan. DESIGN 10A 5 UNITARY BASE and adjustable motor base are welded onto a unitary base of continuously welded structural steel channel. (Refer to page 17 for dimensions.) SPECIAL PAINT AND CORROSION RESISTANT COATINGS Numerous coatings are available to meet the most stringent specifications.

High Temperature and Altitude Selection Chicago Design 10A Type B Centrifugal s are perfectly suited for handling hot gases for air at high temperature applications such as induced draft and industrial ovens. s in arrangements 1.. and 9H are capable of temperatures up to 00 F with the addition of a shaft seal and shaft cooler, while arrangement 9 (L or R) fans have a maximum temperature of 50 F. All fans should be operated within the maximum RPM limits for each class and these limits should be derated per maximum allowable speed, Table III. capacity tables are based on the fan handling standard air at 70 F and sea level. For operating conditions other than standard, correct the HP of the fan and check the speed derating limits. EXAMPLE: Select a fan to handle 45,000 CFM at 5.5" SP at 700 F and at 2000 feet altitude. 1. Refer to Table 1. At 700 F and 2000 feet altitude, the correction factor is 2.5 2. Corrected SP is 2.5 X 5.5" = 1" SP at 70 F and sea level.. Using the fan rating tables, selection of the proper size fan is now based on 45,000 CFM at 1" SP. These specifications indicate that one selection available is the size 40-1/4 Class IV fan which shows a performance of 45,000 CFM at 1" SP, requiring 10.7 BHP at 15 RPM. 4. To correct the BHP, divide 10.7 by 2.5 = 55.1 BHP, which is the corrected BHP at 700 F and 2000 feet altitude. 5. Verify the wheel and shaft maximum speeds using Table II and Table III. a. Multiply the class maximum wheel speed from Table II by the Class IV Wheel Deration Factor from Table III. The wheel maximum speed @ 700 F is 20 RPM x. = 179 RPM. Then multiply the maximum shaft speed from Table II by the Shaft Deration Factor from Table III. The shaft maximum speed @ 700 F is 20 x.94 = 19. Thus, the maximum allowable fan speed is 179 RPM. b. Check the above maximum allowable fan speed against the selected fan RPM. Since the fan operating speed of 15 RPM is within safe limits of the maximum allowable of 179 RPM, the 40-1/4 Class IV fan will deliver 45,000 CFM at 5.5" SP, 700 F and 2000 feet altitude requiring 55.1 HP. TABLE I TEMPERATURE AND ALTITUDE CORRECTION AIR TEMP (F ) -15 0 70 100 150 200 250 00 50 400 500 00 50 700 00 Correction factors for temperature (F) and altitude (above sea level): standard air =.075 lbs. per cubic foot at sea level, 29.92 barometric pressure and 70 F TABLE II MAXIMUM RPM AT 70 F Note: For temperature deration only, not for air performance. CLASS II CLASS III CLASS IV FAN SIZE Shaft Wheel Shaft Wheel Shaft Wheel 24-1/2 27 0-1/2 40-1/4 44-1/2 54-1/4 0 7 0 29.92.79.7 1.00 1.0 1.15 1.25 1.4 1.4 1.5 1.2 1.1 2.00 2.09 2.19 2. 925 75 7 21 500 29..1. 1.02 1.0 1.17 1.27 1. 1.4 1.5 1.5 1.4 2.04 2.1 2.2 2.42 105 7 ALTITUDE (feet) with BAROMETRIC PRESSURE (HG) 1000 2..2.90 1.04 1.10 1.19 1.29 1.9 1. 1.5 1. 1. 2.07 2.17 2.27 2.4 115 1052 951 1500 2..4.92 1.0 1.12 1.22 1.2 1.41 1.51 1.1 1.71 1.91 2.11 2.21 2.1 2.51 115 1052 995 2000 27.2.5.9 1.0 1.14 1.24 1.4 1.44 1.54 1.4 1.75 1.95 2.15 2.25 2.5 2.5 00 2920 294 2771 2529 2271 20 17 12 2500 27.1.7.95 1.10 1.1 1.2 1. 1.47 1.57 1.7 1.7 1.9 2.19 2.29 2.40 2.0 9 9 2 21 27 2271 20 120 1705 For these sizes and classes consult Chicago s SQB Bulletin Refer to Chicago Blower s fan.net for performance, fan curves and sound data. For software and assistance, contact your local Chicago Blower sales engineer. 000 2.2..97 1.12 1.1 1.2 1.9 1. 1.0 1.70 1.1 2.02 2.2 2.4 2.44 2.5 TABLE III TEMPERATURE/ SPEED DERATION Temperature Deration Factors Temp. Standard Wheel (F ) C/2,C/ C/4 70 100 200 00 50 400 450 500 550 00 50 700 00 500 2.2.90.99 1.14 1.20 1.1 1.42 1.52 1. 1.74 1.4 2.0 2.27 2. 2. 2.70 1.00.99.9.9...4.2.1.79.7.77. 4000 25.4.9 1.00 1.1 1.22 1. 1.44 1.55 1. 1.77 1. 2.10 2.2 2.4 2.5 2.75 1.00.99.9.95.95.94.9.92.90..7.. 5000 24.90 1.00 1.04 1.20 1.27 1. 1.50 1.1 1.72 1.4 1.95 2.1 2.40 2.52 2. 2. Shaft All Cl. 1.00 1.00 1,00.99.9.9.97.97.9.9.95.94.9

CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 00 SIZE 24 In. Wheel Diameter 2.90 Sq. Ft. Outlet Area Peak BHP = 1.97(RPM 1000) Tip Speed (fpm) =.2 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 10750 707 2292 2.1 255 24.9 241 2.0 2477 2.2 25 0.4 251 4.25 2770. 11000 79 21 2.94 27 25.0 2 27. 2 29.52 2557 1.9 270 5.21 274 9.27 11250 79 241 24.74 2402 2.4 242 2.54 2521 0.44 257 2.5 290.21 201 40.25 291 44.7 11500 9 25 25.5 242 27. 245 29.44 254 1.9 200. 2711 7.24 219 41.2 2929 45.0 11750 4052 290 2.40 2450 2.7 250 0.5 25 2.4 222 4. 27.1 29 42. 2945 4. 057 51. 12000 41 241 27.2 2475 29.2 252 1.2 259.2 245 5.5 2754 9.40 259 4.51 29 47.7 0 52.4 12250 4224 2441 2.15 2500 0.1 2557 2.24 21 4.1 2. 277 40.52 20 44.9 292 4.97 04 5.4 192 5.44 12500 410 247 29.0 2525 1.12 251.21 27 5.2 291 7.4 279 41. 2901 45.90 002 50.20 101 54.9 20 59.4 12750 7 2 0.00 2550 2.09 20 4.21 21.5 2715.50 220 42.2 292 47.1 022 51. 119 55.97 21 0.70 1000 44 2520 0.9 257.0 21 5.2 2 7.40 279 9.59 24 4.99 2945 4.9 04 52.1 19 57.1 25 2.02 1250 459 254 1.9 202 4.10 257.2 2711.4 27 40.71 27 45.19 297.7 05 54.1 10 5.70 25.40 1500 455 257.01 22 5.1 22 7.5 27 9.5 27 41.4 290 4.40 299 50.97 0 55.5 10 0.14 272 4.4 1750 4741 200 4.07 255.24 270.4 271 40.71 21 4.00 2914 47. 012 52.29 10 5.9 202 1.0 29.4 14000 42 227 5.1 21 7.5 275 9.59 277 41.7 2 44.19 29 4.9 05 5. 10 5. 22.10 1 7.9 14250 14 255.29 270.50 271 40.7 21 4.07 2 45.41 29 50.17 059 54.99 15 59.1 245 4. 5 9.4 14500 5000 2 7.45 275 9. 277 41.9 29 44.29 29 4.5 297 51.4 0 5.7 17 1.2 27.1 5 71.09 14750 50 2711.4 27 40.9 214 4.20 25 45.54 2915 47.9 012 52.1 107 57.77 199 2.77 29 7.75 7 72.74 15000 5172 279 9.7 2790 42.14 241 44.4 291 4. 2941.24 07 54.17 11 59.21 222 4.2 12 9.5 99 74.42 15500 545 279 42.44 247 44.74 29 47.10 2945.51 2994 51.97 0 5.99 10 2.14 270 7. 5 72.1 444 77.5 1000 5517 257 45.14 2904 47. 2952.9 2999 52. 047 54. 140 59.95 21 5.20 19 70.5 405 75.9 0 1. 1500 590 291 4.00 29 50.9 009 52.2 055 55.1 101 57.4 19.04 22.40 9 7.7 45 79.41 5 4.99 17000 52 2979 51.01 02 5.44 07 55.91 112 5.44 157 1.01 24.29 4 71.7 419 77.1 50 2.9 54.71 17500 04 042 54.1 04 5.5 12 59.1 19 1.7 21 4.4 00 9.70 75.22 470 0.9 55. 1000 207 10 57.51 14 0.02 17 2.5 22 5.1 270 7. 55 7.2 440 7.7 52 4. 1500 79 170 1.00 209.55 24.15 2.0 29 71. 411 77.00 4 2. 575.52 19000 552 2 4. 27 7.2 11 9.90 72.59 9 75.2 4 0.91 5.7 19500 724 02. 71.14 74 7. 412 7.5 4 79. 52 4.99 20000 97 9 72.50 40 75.20 4 77.91 474 0.70 511.52 55 9.2 20500 709 4 7. 470 79.4 504 2.21 5 5.0 57 7.9 21000 7241 504 1.0 5.5 59.9 DESIGN 10A CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 2920 SIZE 24-1/2 2-7/1 In. Wheel Diameter.52 Sq. Ft. Outlet Area OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 1000 9 207 27.97 215 0.17 2191 2.7 2245 4.57 2299.79 2404 41.40 251 4.4 1250 74 2095 2.74 2152 0.99 2207.2 222 5.47 215 7.72 241 42.4 252 47.29 1500 5 2114 29.5 219 1.2 2224 4.10 227. 21.7 24 4.2 255 4.2 1750 90 212 0.4 217 2. 2241 4.99 2295 7.1 247 9.4 244 44.4 254.24 251 54.55 14000 977 2150 1.1 2205.52 2259 5.9 212.2 2 40.2 244 45. 252 50.29 21 55.52 14250 404 219 2.00 222 4.9 227.0 229 9.21 20 41.2 240 4.45 257 51. 27 5.5 2775 2.0 14500 4119 21 2. 2242 5.29 2294 7.7 24 40.1 297 42.4 2 47.54 2592 52.52 2 57.70 27.25 14750 4190 2207.74 220.19 212. 24 41.17 2414 4.7 2512 4.5 207 5. 2700 5. 2794 4.5 15000 421 222 4.4 2279 7.12 21 9.4 21 42.17 241 44.71 2529.7 22 54. 2715 0.0 20 5.54 2902 71.44 15250 42 224 5.57 229.07 2 40.2 299 4.19 24 45.77 2545 50.92 29 5.09 270 1. 219.7 2911 72.5 15500 440 225.52 217 9.05 2 41.2 241 44.22 247 4.4 252 52.09 255 57. 2745 2.2 2.07 15750 4474 225 7. 2 40.04 27 42.4 24 45.2 245 47.9 2579 5.2 272 5.59 271.95 24 9.41 1000 4545 205.4 25 41.0 240 4. 2455 4.5 250.04 2597 54.45 2 59. 2777 5.29 2 70.79 1250 41 225 9.50 275 42.10 2425 44.75 247 47.44 2521 50.17 214 55. 2705 1.1 279. 279 72.21 1500 4 245 40.55 295 4.17 2444 45.4 22 4.5 2540 51.2 22 5. 2722 2.47 209.04 295 7. 1750 4759 25 41.2 2415 44.2 244 4.9 2511.70 255 52. 250 5.12 279.0 22 9.45 2911 75.14 17000 40 2 42.72 245 45. 24 4.10 251 50.7 2577 5. 2 59. 275 5.14 24 70. 17250 01 240 4.4 2455 4.52 250.2 2550 52.05 259 54.9 2 0. 2774. 259 72. 17500 72 2427 45.00 2475 47.9 252 50.45 259 5.27 215 5.1 2705 1.9 2791 7.7 27 7.79 17750 504 244 4.1 2 4.9 254 51.7 259 54.51 24 57.40 272.29 209 9.2 294 75.27 1000 5114 249 47. 251 50.12 25 52.92 209 55.7 254 5.9 2742 4. 227 70. 2911 7.77 1250 515 21 4.2 257 51. 25 54.20 229 57.0 27 0.01 271.00 24 72.12 1500 525 251.9 255 52. 20 55.50 2 5.40 29 1.5 270 7.40 24 7.57 19000 59 255 52.51 200 55.2 245 5.20 29 1.14 27 4.1 21 70.27 2901 7.5 19500 5540 201 55.25 244 5.10 27 1.02 270 4.00 277 7.0 257 7.25 20000 52 24 5.11 2 1.01 2729.9 2771.9 21 70.05 297 7. 20500 524 292 1.11 272 4.04 277 7.0 214 70.09 255 7.20 21000 59 279 4.2 277 7.20 217 70.2 257 7. 297 7.4 21500 10 277 7.47 224 70. 22 7.57 2900 7.70 22000 250 24 70. 271 7.92 2907 77.04 22500 92 2 74. 291 77. Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Peak BHP =.142(RPM 1000) Tip Speed (fpm) =.92 x RPM Performance ratings do not include the effects of appurtenances in the air stream. 7

CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 294 SIZE 29-1/ In. Wheel Diameter Peak BHP = 5.10(RPM 1000) 27 4.27 Sq. Ft. Outlet Area Tip Speed (fpm) = 7.2 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 1000 044 174 2.1 10 2.4 1 0.9 1500 12 1772 27.4 127 29.7 1 2.2 1941 4. 14000 279 179 2. 150 1.1 1904. 195.1 2014.9 14500 9 120 0.2 174 2. 1927 5.1 1979 7.7 201 40. 15000 51 145 1. 199 4.1 1951.7 2001 9. 2052 41.9 2154 47. 15500 0 171.1 1924 5.7 1975. 2025 41.0 2074 4.7 2171.2 1000 747 19 4. 19 7. 2000 40.0 20 42. 2097 45.5 2192 51.1 227 57.1 1500 4 1925.2 1975 9.0 2025 41. 2074 44. 2121 47.4 2214 5.0 205 59.0 2402 5. 17000 91 195 7.9 2002 40.7 2051 4. 2099 4.5 214. 227 55.1 22 1.1 241 7.4 17500 409 191 9.5 200 42.5 207 45.4 2125 4.4 2171 51. 221 57. 24. 244 9. 252 7.4 1000 4215 2009 41. 2057 44. 2105 47. 2151 50.4 219 5.4 225 59.5 271 5. 2455 71.9 2540 7. 1500 4 20 4.1 20 4.2 212. 217 52.4 222 55.5 210 1. 295.0 247 74.4 2559 1.0 242.0 19000 4450 20 45.1 2114 4.1 210 51. 2205 54.5 22 57.7 2 4.1 2420 70.5 2501 77.0 250. 20 90. 19500 457 2097 47.0 214 50.2 219 5.4 22 5. 227 59.9 21.5 2444 7.1 2525 79.7 20.4 20 9. 20000 44 2127.1 217 52. 2217 55.5 221 5. 204 2.2 2.9 249 75.7 25 2.4 227 9. 2702 9.2 20500 401 215 51. 2202 54.5 224 57. 2290 1.1 22 4.5 2415 71.4 25 7. 2574 5. 250 92.2 2725 99.2 21000 1 21 5.5 222 5. 227 0.1 219.5 20.9 2442 74.0 2521 1.1 2599.2 275 95. 27 102.4 21500 505 2220 55. 22 59.1 20 2.5 24.0 29 9.5 2470 7. 254. 224 91.1 299 9.4 277 105.7 22000 5152 2252 5. 2294 1. 2 5.0 277.5 241 72.0 2 79. 2575.7 251 94.1 2724 101. 2797 109.0 22500 529 224 0. 225 4.2 2 7. 2407 71.1 244 74.7 252 2.1 20 9. 277 97.2 2750 104. 222 112.4 2000 5 217.4 257. 297 70. 247 7.9 2477 77.5 2555 4.9 20 92. 2704 100. 277 10.1 247 115.9 2500 5504 250.1 29 9. 242 7.1 24 7.7 2507 0.4 254 7.9 259 95. 271 10.5 20 111.4 227 119.4 24000 521 24 9.0 2422 72.4 240 7.0 29 79.7 257.4 21 91.0 27 9. 2759 10. 229 114.9 29 12.0 24500 57 241 71.9 2455 75.4 22 79.0 250 2.7 25.4 24 94.1 271 102.0 277 110.1 257 11.4 2925 12. 25000 555 245 74.9 24 7.5 2525 2.1 252 5. 2599 9. 27 97.4 2745 105.4 215 11. 24 121.9 2952 10.4 25500 5972 24 7.0 252 1.7 255 5. 2594 9.1 20 92.9 270 100. 2774 10.9 244 117.2 2912 125. 2000 09 252 1. 2557 4.9 2592.7 227 92.5 22 9. 27 104.2 204 112.4 27 120. 2940 129.4 2500 20 2559 4. 2592. 22 92.1 20 95.9 294 99. 274 107. 24 11.1 2902 124. 27000 2 2595.1 227 91. 20 95. 29 99.5 2727 10.5 279 111.5 24 119.9 292 12.4 27500 440 21 91.7 2 95.5 295 99. 2727 10.2 270 107.2 227 115.4 295 12. 291 12.4 2000 557 2 95.4 29 99.2 270 10.1 271 107.1 2794 111.1 259 119. 2925 127. CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 2771 SIZE 2-/ In. Wheel Diameter Peak BHP =.(RPM 1000) 0 5.72 Sq. Ft. Outlet Area Tip Speed (fpm) =.4 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 1000 147 15 7.1 1707 40.2 170 4.5 112 47.0 14 50.7 1500 24 174.5 172 41. 1774 44.9 125 4.4 17 52.0 19000 22 19 40.0 1741 4.2 179 4.4 19. 19 5.4 19500 409 171 41. 1759 44.7 10 4.0 154 51.4 1902 55.0 1999 2.7 20000 7 174 4.2 1779 4.4 124.7 170 5.1 1917 5.7 2011 4.2 20500 54 1755 44.9 1799 4.1 14 51.5 17 54.9 192 5.4 2024 5.9 211 74.2 21000 71 1777 4.7 120 50.0 12 5. 1905 5.7 19 0. 20 7. 212 75.9 21500 759 1799 4. 141 51. 12 55.2 1924 5.7 19 2.2 205 9.7 2141 77.7 222.5 22000 4 122 50.5 1 5. 190 57.2 1944 0.7 195 4.2 20 71.7 2154 79.7 2240.4 22500 94 145 52.4 15 55. 1925 59. 194 2. 2004.4 205 7.9 21 1. 2252 90.4 25 99. 2000 4021 1 54.4 190 57.9 1947 1.4 195 4.9 2024. 210 7.1 21 4.0 225 92.5 247 101.7 2500 410 192 5. 190 0.0 199. 2007 7.2 2045 70. 2121 7.4 2199.4 2279 94. 20 10. 2 11.5 24000 419 1915 5.7 1954 2. 1991 5.9 2029 9.5 20 7.2 2140 0. 221. 2294 97.2 27 10.1 2451 115.7 24500 42 199 0.9 1977 4. 2014.2 2051 71.9 207 75. 210. 224 91. 209 99.7 2 10. 244 11.1 25000 471 19.2 2001.9 207 70. 2074 74.4 2109 7.2 211 5.9 225 9.9 22 102.4 2400 111.2 247 120. 25500 445 19 5. 2024 9. 201 7.1 209 7.9 212 0.7 2202. 2272 9.7 24 105.1 241 114.0 20 12. 2000 4545 2012.0 20 71. 204 75.7 2119 79.5 2154.4 222 91. 2292 99.5 21 10.0 242 11. 2504 12.1 2500 4 207 70.5 207 74.4 210 7. 214 2.2 2177.2 2245 94.2 212 102.4 20 110.9 24 119. 2519 129.0 27000 4720 202 7.0 2097 77.0 212 1.0 217 5.0 2200 9.0 227 97.1 2 105.4 2400 114.0 247 122. 255 12.1 27500 40 207 75.7 2122 79.7 215. 2190 7. 2224 91.9 2290 100.1 255 10.5 2420 117.1 245 12.0 2552 15. 2000 5 2112 7.4 214 2.5 211. 2214 90.7 2247 94. 21 10.2 277 111.7 2440 120.4 2504 129. 259 1. 2500 21 1.1 2172 5. 2205 9.5 22 9.7 2271 97.9 2 10.4 299 114.9 241 12.7 2524 12.7 257 142.0 29000 5070 21 4.0 2197.2 220 92.5 22 9. 2295 101.0 259 109. 2421 11. 24 127.1 2544 1.2 20 145. 29500 5157 219.9 2222 91.2 2255 95.5 227 99.9 219 104.2 22 112.9 2444 121.7 2504 10.7 255 19. 22 1.2 0000 5245 2215 9. 224 94. 220 9.7 212 10.1 24 107.5 240 11. 247 125. 2527 14. 25 14.5 24 15.0 0500 52 2242 92.9 227 97.4 205 101.9 2 10.4 2 110.9 2429 119. 20 12.9 25 1.0 20 147. 2 15.9 1000 5420 22 9.0 2299 100. 20 105.2 22 109.7 292 114. 245 12.4 251 12. 2572 141. 229 151.2 27 10. 1500 5507 2295 99.2 225 10.9 25 10.5 27 11.2 2417 117. 2477 127.1 257 1.4 2594 145.7 251 155.2 270 14.9 2000 5594 221 102.5 252 107.2 22 112.0 2412 11.7 2442 121.4 2502 10. 250 140.2 217 1.7 274 159. 270 19.1 2500 52 24 105. 27 110.7 240 115.5 24 120. 247 125.1 252 14. 254 144.2 241 15. 29 1.5 2752 17.4 000 579 275 109. 2405 114.2 244 119.1 24 124.0 2 12. 2551 1.5 20 14.2 24 15.0 2719 17. Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Performance ratings do not include the effects of appurtenances in the air stream.

CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 2529 SIZE 5-9/1 In. Wheel Diameter Peak BHP = 1.(RPM 1000). Sq. Ft. Outlet Area Tip Speed (fpm) = 9.1 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 2000 05 15 4.9 1592 52. 1 5.7 11 0.9 172 5.2 2750 72 1572 51.4 11 55.2 155 59.2 19. 1742 7. 129 7.9 24500 40 159 5.9 1 57. 17 1. 1717 5.9 1759 70.2 144 79.4 192 9.5 25250 95 120 5. 159 0.5 19 4.5 177.7 1777 7.0 159 2.1 1941 92.0 2000 4075 14 59.4 1.4 1721 7.5 1759 71. 179 7.0 17 5.0 195 94. 205 105.5 2750 419 172 2. 170.4 1745 70.5 172 74.7 119 79.1 194.1 1971 97. 20 10. 27500 410 19 5.4 174 9.5 1770 7.7 105 7.0 141 2. 1914 91.5 19 101.1 204 111.4 219 122. 2250 442 1725.5 170 72.7 1795 77.0 10 1. 14 5. 194 94.9 200 104. 2079 114. 215 125. 2225 17. 29000 4545 1752 71. 17 7.1 121 0.5 155 4.9 1 9.4 195 9. 2025 10. 209 11.5 21 129. 229 140.9 29750 4 1779 75. 11 79. 147 4.1 10. 191 9.1 1979 102.4 204 112.1 2114 122.4 21 1.1 225 144.5 0500 471 107 7. 140. 17 7. 190 92.4 19 97.0 200 10.4 207 11.2 21 12.4 2200 17.2 22 14.5 1250 14 2.5 1 7.1 1900 91.7 192 9. 194 101.0 2027 110. 2090 120.4 215 10.7 221 141.4 224 152.7 2000 501 1. 195 91.0 1927 95.7 1959 100.4 1990 105.2 2052 114.9 211 124.9 2175 15.2 227 145.9 201 157.2 2750 51 191 90.2 192 95.0 1955 99. 19 104. 201 109.5 2077 119.4 217 129.4 2197 19. 225 150. 219 11.9 500 5251 1920 94.2 1951 99.2 192 104.1 201 109.0 204 114.0 210 124.0 211 14.2 2220 144.7 2279 155.5 29 1. 4250 5 19 9.4 190 10.5 2010 10.5 2040 11.5 2070 11. 2129 12. 21 19.1 2244 1.7 201 10.7 259 171.9 5000 54 197 102. 200 107.9 20 11.1 20 11.2 209 12.4 2155 1.7 2212 144.2 22 154.9 224 1.0 21 177. 5750 50 200 107.2 207 112.5 207 117.7 209 12.0 2125 12. 212 1. 22 1.5 229 10.4 24 171.5 240 12.9 500 5721 207 111. 20 117.2 2095 122. 2124 127.9 215 1. 2209 144.1 224 154.9 21 15.9 272 177.2 242 1.7 7250 59 207 11.5 209 122.1 2124 127. 215 1.0 211 1.5 22 1.5 2290 10.5 244 171.7 297 1.0 24 194. 000 595 209 121.4 212 127.1 2154 12.7 211 1. 2209 14.9 224 155.1 217 1. 270 177. 2422 19.1 247 200. 750 074 212 12.5 2155 12.2 21 1.0 2210 14.7 227 1.4 2291 10. 244 172.2 29 1.7 2447 195.4 2 207.2 9500 191 2159 11.7 21 17.5 221 14.4 229 1.2 22 155.1 219 1.7 272 17. 242 190.0 247 201. 252 21. 40250 09 2190 17.0 221 14.0 2242 1.0 229 154.9 2295 10.9 247 172.7 299 14. 2450 19.4 29 20.4 41000 42 2221 142.5 2247 14. 2272 154.7 229 10. 224 1.9 27 17.9 2427 191.0 2477 20.1 252 215.2 41750 544 2252 14.2 2277 154.4 20 10. 22 1. 254 17.0 2404 15. 2455 197. 2504 209.9 42500 1 22 154.0 20 10.4 2 1.7 25 17.0 2 179. 24 191. 24 204. 4250 779 215 10.0 29 1.5 24 172.9 2 179. 241 15.7 242 19.5 2511 211. 44000 97 24 1.1 271 172.7 295 179. 2419 15.9 244 192.4 21 205.4 44750 7014 27 172.5 2402 179.2 242 15.9 2450 192. 247 199.2 2521 212.5 45500 712 2410 179.0 244 15. 2457 192. 240 199.4 2504 20.2 DESIGN 10A CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 2271 SIZE -1/2 9-/ In. Wheel Diameter 7.0 Sq. Ft. Outlet Area Peak BHP = 24.17(RPM 1000) Tip Speed (fpm) = 10.1 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 27500 52 14 5.9 191 1.9 14 7.2 140 72.5 1522 77.7 159.1 172 99.1 2250 22 159 5.9 140 4.0 144 9.2 10 74. 152 0.1 10 90. 179 101. 29000 71 17 1.1 1415.1 1457 71.4 1500 7.9 1542 2.4 121 9.5 190 104.5 172 11.1 29750 14 1. 142.4 149 7. 1510 79.1 1552 4. 12 9.2 1702 107.5 179 11.9 0500 910 140 5.7 1442 70.7 141 7.0 1522 1.5 152 7.2 142 9.9 1715 110. 170 122.1 1 14. 1250 400 1419.2 1457 7.2 15 7.5 15 4.0 157 9.7 152 101. 172 11. 179 125.4 15 17.4 2000 410 14 70.9 1472 75. 1509 1.1 154. 154 92. 12 104. 177 11. 105 12. 17 140.9 192 15. 2750 4199 145 7. 14 7. 1524.9 150 9.4 1597 95.1 172 107.1 1747 119. 117 12.2 10 144.5 1940 157.1 500 4295 1471 7.5 1505 1.5 159.7 1574 92.2 110 97.9 1 110.0 1757 122. 12 15.5 192 14. 1951 10.9 4250 1 1 79.4 1522 4.5 1555 9. 159 95.2 124 100.9 194 11.0 177 125.7 1 1.9 1904 152.0 194 14.9 5000 447 1507 2.5 1540 7. 1572 92.9 105 9.4 1 104.1 1707 11.1 1777 12.9 14 142.2 1915 155.7 1977 19.0 5750 45 152 5. 155 90.9 159 9.2 121 101.7 15 107. 1720 119.4 17 12.2 15 145. 1925 159.4 19 17.1 500 479 1545.9 157 94.2 107 99. 1 105.1 19 110. 174 122. 100 15. 1 1.1 195 1.1 1999 177.1 7250 477 15 92.2 1594 97.7 125 10.1 155 10.7 15 114. 174 12. 112 19.1 17 152.7 1945 1. 2010 11.1 000 472 152 95.7 11 101.2 14 10.7 17 112.4 1702 11.1 17 10.0 12 142. 190 15.4 1955 170. 2020 15.2 750 101 99.2 12 104. 11 110.5 191 11.2 1720 121.9 177 1.9 19 14.7 1902 10.2 19 174.5 2029 19.2 9500 504 120 102. 151 10. 10 114. 1709 120.1 177 125.9 1795 17.9 154 150.7 1915 14.2 1977 17.5 209 19. 40250 510 140 10.5 170 112.4 199 11. 1727 124.1 1755 10.0 111 142.1 19 154.9 192 1.4 19 12. 2050 197.5 41000 525 159 110. 19 11.4 171 122. 174 12. 177 14. 129 14.5 14 159.2 1942 172.7 2001 17.0 201 201.9 41750 55 17 114.1 170 120.4 17 12.5 174 12.5 1792 1. 14 150.9 1900 1.7 195 177.2 2014 191.4 2072 20. 42500 54 197 11.1 1727 124.5 175 10.7 17 1.9 110 14.1 14 155.5 1917 1.4 1971 11. 2027 19.1 204 211.0 4250 5545 171 122.1 174 12. 1775 15.1 102 141.4 129 147. 12 10. 194 17.2 197 1. 2041 200.9 2097 215. 44000 541 175 12.2 175 12.9 1794 19.5 121 145.9 14 152. 1900 15.1 1951 17.2 200 191.7 205 205. 2110 220.7 44750 577 1755 10.4 174 17.2 11 144.0 140 150. 17 157.1 191 170.1 199 1. 2020 19. 2071 211.0 2124 225.9 45500 5 1774 14.7 10 141.7 12 14. 159 155.4 1 12.0 197 175.2 197 1. 207 202.2 207 21. 21 21.2 4250 5929 1794 19.0 12 14.2 151 15. 179 10.2 1905 17.0 195 10.5 2005 194.0 2054 207.7 210 221.9 215 2.7 47000 02 11 14.5 142 150. 170 15.0 19 15.2 1924 172.1 1975 15. 202 199.5 2072 21.4 2120 227. 219 242.4 47750 122 1 14.1 12 155.5 19 12.9 1917 170.2 194 177. 199 191. 2042 205.2 209 219.2 217 2.5 214 24. 4500 21 15 152. 11 10.4 1909 17.9 19 175. 192 12. 2012 19.9 200 211.0 2107 225.1 2154 29. 2201 254.4 250 14 174 157. 1901 15. 192 172.9 1955 10.5 191 1.0 202 202. 2079 21.9 212 21. 2172 245. 2217 20.7 50000 410 194 12.5 1921 170. 194 17.1 1974 15. 2001 19.5 2051 20.4 209 22.0 2144 27.5 219 252.2 225 27.2 Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Performance ratings do not include the effects of appurtenances in the air stream. 9

CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 20 SIZE 40-1/4 4-7/1 In. Wheel Diameter 9.4 Sq. Ft. Outlet Area Peak BHP = 9.(RPM 1000) Tip Speed (fpm) = 11.7 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 7500 95 127 1. 11 7.4 14 9. 14 100.5 1420 107.4 12 121.7 1559 1.1 11 150.2 17 14.9 250 405 1290. 124 9.9 15 9. 19 10.0 142 110.0 1500 124.4 157 19.1 12 15. 15 1.2 9000 4114 10.5 15 92.5 1 9.9 1402 105. 147 112. 1507 127.2 1575 142.2 17 157.0 19 171.7 1752 17.2 9750 419 11 9.2 147 95. 179 101.7 1412 10.4 144 115. 1515 129.9 15 145.2 14 10.4 170 175.4 175 190.7 40500 4272 129 92.0 10 9.2 191 104.5 142 111.2 145 11.2 152 12. 1590 14.2 154 1. 1712 179.1 17 194.4 41250 451 142 95.0 172 101.1 140 107.5 144 114.2 14 121.1 151 15. 1597 151. 12 17.1 1721 12.9 1775 19.4 42000 440 15 9.0 15 104.2 1415 110. 1445 117.2 147 124.2 1540 1. 105 154.4 19 170.5 170 1. 174 202.4 42750 4509 19 101.0 19 107. 142 11. 1457 120.4 147 127. 15 142.0 11 157. 177 17. 17 190. 1794 20. 4500 459 1 104.2 1412 110. 1441 117.1 149 12.7 19 10. 1559 145. 121 10.9 14 177.2 1745 194.0 102 210. 44250 4 197 107.5 1425 11.9 1454 120.5 142 127.1 1510 14.0 159 14.7 10 14. 191 10.7 175 197.7 111 214.7 45000 4747 1411 110. 1 117. 147 12.9 15 10.7 1522 17. 150 152.2 19 17. 199 14. 170 201.4 119 21.7 45750 42 1425 114.2 145 120. 140 127.5 150 14. 155 141.2 1591 155. 14 171.4 170 17.9 177 205.1 12 222.7 4500 05 1 117.7 147 124.4 14 11.2 1521 1.0 154 145.0 102 159. 15 175.2 171 191.7 1775 20.9 1 22.7 47250 4 145 121.2 141 12.1 150 14.9 154 141.9 151 14.9 114 1.5 19 179.0 1725 195.5 17 212.9 141 20. 4000 50 14 124. 15 11. 1522 1. 154 145. 1574 152.9 12 17.5 179 1.0 175 199.5 1791 21.9 14 24.9 4750 5142 142 12.5 1509 15. 155 142.7 151 1. 157 157.0 1 171.7 191 17.2 1744 20.7 100 221.0 15 29.1 500 5222 1 12. 152 19.5 1550 14.7 1575 15.9 100 11.2 151 175.9 1702 191.4 1755 207.9 109 225. 14 24.4 50250 501 1510 1.1 157 14.5 154 150. 159 15.1 114 15.5 14 10.4 1714 195.9 175 212. 11 229. 172 247. 51000 50 1525 19.9 1552 147.5 157 155.0 10 12.4 12 19. 177 14.9 172 200.4 177 21. 12 24.2 11 252. 51750 5459 159 14.9 15 151.7 1592 159. 117 1. 142 174. 190 19.5 17 205.1 177 221.5 1 2. 190 257.0 52500 55 155 147.9 150 155. 10 1. 11 171. 15 17.9 170 194.2 1751 209.9 1799 22. 1 24. 199 21. 5250 517 157 152.0 1594 10.1 120 1.0 145 175. 170 1. 1717 199.1 174 214.9 111 21. 159 24.5 1909 2.7 54000 59 152 15.1 109 14.4 15 172.5 10 10.4 14 1. 171 204.0 1777 220.0 12 2.4 171 25. 1919 271. 54750 5775 159 10. 12 1. 1 177.0 174 15.2 19 19.1 1744 209.0 1790 225.1 1 241. 12 25.9 190 277.0 55500 554 111 14.7 17 17.2 1 11.7 1 19.9 1712 19.1 175 214.2 10 20.4 14 247.0 194 24.2 1940 22. 5250 594 125 19.0 152 177. 177 1.4 1702 194. 172 20.1 1772 219.4 117 25. 11 252. 190 29. 1951 27.9 57000 01 140 17.5 1 12.4 192 191.1 171 199.7 1740 20.2 17 224. 11 241.4 174 25.2 191 275.5 19 29.5 57750 092 155 17.1 11 17.0 170 19.0 171 204.7 1755 21. 100 20.2 144 247.0 1 24.0 191 21.4 1974 299. 5500 171 170 12.7 195 191. 1720 200.9 1745 209. 179 21. 114 25. 15 252.7 1901 29.9 1944 27.4 19 05.4 59250 250 15 17.4 1710 19.7 175 205.9 1759 215.0 17 22.9 129 241.4 172 25. 1914 275.9 1957 29.5 1999 11.5 0000 29 1700 192. 1724 201. 17 210.9 1774 220.2 1797 229. 14 247.1 1 24.5 192 22.0 1970 299.7 2011 17.9 CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS IV 17 SIZE 44-1/2 4 In. Wheel Diameter 11.5 Sq. Ft. Outlet Area Peak BHP = 5.07(RPM 1000) Tip Speed (fpm) = 12.57 x RPM OV 10" SP 11" SP 12" SP 1" SP 14" SP 1" SP 1" SP 20" SP 22" SP 24" SP 40000 454 1097 2.4 115 9. 1172 97.5 120 105.2 1241 112. 102 127.9 41000 541 110 4.9 1142 92.4 1179 100.2 1215 10.1 12 115.9 110 11.4 172 147.7 42000 27 1115 7.7 1151 95.2 117 10.0 122 111.0 1257 119.1 120 15.0 177 151.1 4000 71 1125 90.5 110 9.0 1195 105. 120 11.9 125 122.2 129 1.7 15 154.9 1445 172. 44000 00 11 9.5 119 101.0 120 10. 127 117.0 1272 125. 17 142. 195 15.9 1450 175.9 45000 1147 9. 1179 104.1 1212 111.9 1245 120.1 1279 12.5 145 145. 1404 1.0 145 10.0 4000 972 1159 99.9 1190 107.4 1222 115.2 1254 12.4 127 11. 152 1.4 141 17.0 14 14.4 1520 202.2 47000 4059 1171 10.4 1201 110. 122 11. 12 12. 1295 15. 159 15.0 1421 171.1 147 1.9 1527 20.7 4000 4145 114 10.9 121 114.4 1242 122.2 127 10. 104 1. 17 15.7 142 175.1 145 19.4 15 211.5 157 20.2 000 421 1197 110.7 1225 11.1 1254 125.9 12 14.0 11 142.5 174 10.4 14 179.1 1 19.0 1545 21.4 1594 25.1 50000 41 1210 114.5 127 122.0 125 129. 1294 17.9 12 14.4 12 14. 144 1.2 1501 202.4 1554 221.5 10 240. 51000 4404 122 11.5 1250 12.0 1277 1. 105 142.0 1 150.4 191 1. 1450 17. 1509 20.9 15 22.4 112 245.7 52000 41 12 122.5 12 10.2 129 1.0 11 14.1 144 154. 1400 172.5 145 191.5 151 211. 1571 21.4 121 251.1 5000 4577 1250 12.7 127 14.5 102 142.4 12 150.5 155 159.0 1410 17. 14 195.9 152 215.9 1579 2. 10 25. 54000 4 124 11.1 129 1.9 115 14.9 141 155.1 1 1.5 1420 11.4 1474 200.4 150 220.5 15 241.2 1 22.0 55000 4750 127 15.5 10 14.5 12 151. 15 159. 17 1.2 140 1.1 144 205.1 15 225.2 159 24.1 14 27. 5000 4 1291 140.0 117 14.2 141 15.4 1 14.7 191 17.1 1441 190.9 1 210.0 154 20.1 100 251.1 15 272.7 57000 22 105 144.7 10 15.0 155 11. 179 19.7 140 17.2 1452 19.0 150 215.0 1555 25.1 10 25. 11 27.0 5000 5009 120 1.4 144 157.9 19 1. 192 174. 141 1.4 144 201.2 151 220.2 154 240.4 11 21.5 1 2.5 59000 5095 14 154. 15 12.9 12 171.5 140 10.1 1429 1. 147 20.7 1524 225. 157 245.7 124 2.9 175 29.0 0000 511 14 159. 172 1.1 19 17. 1419 15.5 1442 194. 14 212. 155 21.2 15 251. 1 272.5 1 294. 1000 52 12 14. 1 17. 1410 12.2 14 191.1 145 199.9 1501 21.1 1547 27.0 1594 257.1 142 27. 2000 554 17 19.4 1400 17.7 1424 17.7 1447 19.7 149 205. 1514 224.1 155 24.0 104 2.1 151 24.2 000 5440 190 174.7 1414 14.1 14 19.4 141 202.5 14 211.7 1527 20.2 1571 2.2 115 29. 11 290.4 4000 5527 1404 10.0 1429 19.7 1452 199.1 1475 20.5 17 217. 1540 2.5 15 255. 127 275. 172 29. 5000 51 141 15.4 144 195. 14 205.0 1 214.5 1511 224.0 155 242.9 159 22.2 19 22.2 12 0. 000 599 142 191.0 1457 201.1 140 211.0 150 220.7 1524 20. 157 2.5 109 29.0 151 29.1 7000 57 1447 19. 1471 20.9 14 217.1 1517 227.0 15 2. 151 25.2 122 275.9 1 29.1 000 572 141 202.4 145 212.9 150 22.2 151 2.4 1552 24.4 1594 2.1 15 2.0 17 0. 9000 5959 1475 20. 19 219.0 1522 229.5 1545 29.9 157 250.1 10 270.2 14 290. 70000 045 10 214. 151 225.1 15 25.9 1559 24.5 151 25.9 122 277. 12 297.7 Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Performance ratings do not include the effects of appurtenances in the air stream. 10

CHICAGO BLOWER BACKWARD INCLINED FAN SIZE 52-7/ In. Wheel Diameter 14.05 Sq. Ft. Outlet Area Max. RPM CLASS II 925 Max. RPM CLASS III 115 Max. RPM CLASS IV 175 Peak BHP = 105.54(RPM 1000) Tip Speed (fpm) = 1.4 x RPM OV 1/2" SP 1" SP 1-1/2" SP 2" SP 2-1/2" SP " SP -1/2" SP 4" SP 4-1/2" SP 5" SP 14000 99 250 1. 07 2. 1000 119 271 2.1 19. 9 4. 1000 121 292 2. 4.0 1 5.5 42 7.2 20000 142 14.2 55 4.7 94. 45.1 472 10.0 22000 15 7.9 7 5. 411 7.2 447 9.1 45 11.2 51 1. 5 15.4 24000 170 0 4. 97. 40.4 42 10.2 12. 51 14. 51 1.9 59 19.2 2000 151 5 5.7 41 7.7 451 9.7 40 11. 510 1.7 542 1.0 57 1.5 0 21.0 2 2.4 2000 199 411. 440.9 472 11.1 500 1.1 527 15.2 555 17. 55 20.1 14 22.7 42 25.4 2.1 0000 215 4.1 4 10. 12. 520 14. 54 17.0 571 19.4 59 21.9 25 24. 5 27.4 79 0. 2000 227 42 9.5 4 11. 514 14. 541 1.7 5 19.1 590 21.4 14 2.9 9 2.7 4 29.5 90 2. 4000 2420 11.1 511 1.5 5 1.1 52 1. 5 21. 09 2.7 1 2. 54 29.0 7 1.9 702 4.9 000 252 515 12.9 55 15.4 55 1.1 5 20.9 07 2.7 29 2. 51 2.9 72 1. 9 4.5 71 7. 000 2705 542 14.9 50 17.5 52 20. 05 2. 29 2.2 50 29.0 71 1. 91 4. 711 7.5 71 40.5 40000 247 59 17.1 5 19. 05 22.7 27 25. 50 2.9 71 1.9 92 4.9 711 7. 70 40.7 7 4. 42000 299 59 19.5 12 22. 0 25. 50 2.5 71 1. 92 5.0 712.2 71 41.2 750 44. 7 47.4 44000 12 22 22.1 25.1 54 2.2 7 1.5 9 4.9 714. 74 41.7 752 44.9 770 4.1 77 51. 4000 274 25.0 4 2.0 79 1. 97 4.7 71.2 75 41. 755 45. 77 4. 791 52.2 0 55.5 4000 41 7 2.1 90 1. 705 4. 721.1 79 41. 757 45.5 77.2 794 52.9 12 5.5 29 0.0 50000 559 70 1.5 717 4. 71.2 74 41. 72 45. 779.4 797 5. 15 57.2 1.0 4.7 52000 701 71 5.1 74. 75 42.1 771 45. 7. 02 5. 19 57. 7 1.7 54 5.7 71 9. 54000 4 75 9.0 770 42. 72 4. 79 50.1 10 54.0 2 5.1 42 2. 5.5 75 70. 92 74. 5000 9 75 4. 797 47.0 09 50.7 21 54.7 5 5.7 2. 5 7.1 1 71.5 97 75. 91 0.2 5000 412 12 47. 2 51. 5 55.5 47 59.5 0. 7 7.9 72. 90 7. 919 1. 94 5. 0000 4270 40 52.7 50 5. 1 0. 7 4.7 5 9.0 9 7. 912 77. 92 2.4 941 7.1 95 91.7 OV 5-1/2" SP " SP 7" SP " SP 9" SP 10" SP 11" SP 12" SP 1" SP 14" SP 2000 199 90 0. 0000 215 70.2 725.0 2000 227 71 5. 79.7 71 44. 4000 2420 727.1 751 41.4 794 47.9 4 54.4 000 252 7 40. 72 44.1 07 51.0 47 57.9 4 4. 000 2705 752 4.7 774 47.1 1 54.2 0 1.5 97.7 92 75.9 40000 247 7 47.0 7 50. 29 57.5 71 5.0 910 72.7 945 0. 97 7.9 42000 299 7 50. 04 5.9 4 1.1 2.7 921 7. 95 4. 991 92.7 102 100. 105 109.4 44000 12 05 54. 22 57.9 5 5.0 94 72.7 92 0.9 970 9. 1005 97.7 10 10.0 107 114.4 1099 12.2 4000 274 24 5.9 41 2. 74 9.4 909 77.0 944 5.2 90 9. 101 102.7 1050 111.5 100 120.2 1109 12.9 4000 41 45.5 1 7.0 92 74.2 925 1. 95 90.0 992 9. 1027 107. 101 11. 109 12.1 112 15.1 50000 559 5. 1 72.0 911 79. 942 7.0 97 95.1 100 10.7 109 112. 1072 122.2 1105 11.9 11 141.5 52000 701 7.5 902 77.2 91 4. 90 92. 990 100.7 1020 109. 1052 11.4 10 127.9 1115 17.7 1147 147.7 54000 4 907 7. 922 2. 951 90.7 90 9. 100 10.7 10 115. 10 124.4 109 1.9 1127 14. 115 154.0 5000 9 92 4.5 94. 972 9. 999 105.0 1027 11. 1054 121.9 102 10.9 1110 140.4 1140 150. 119 10. 5000 412 950 90. 95 94.7 99 10. 1020 111.7 104 120.2 1072 12.9 1099 17.9 112 147.4 1154 157. 112 17. 0000 4270 971 9.4 9 101.0 1014 110.0 1041 11. 10 127.5 1092 1. 1117 145.4 114 154. 119 14.7 119 175.0 2000 441 992 102. 1007 107. 105 117.0 101 12.1 107 15.2 1111 144.2 11 15.4 110 12.9 115 172.7 1211 1.0 4000 4555 1014 109.4 102 114.4 105 124. 102 1. 1107 14.2 112 152.5 1155 11.9 1179 171.4 120 11. 1227 191.5 000 49 10 11.4 1050 121. 1077 11. 1104 141. 112 151.5 1152 11.1 1175 170.7 119 10.5 1221 190.4 1245 200. 000 440 1059 12. 1072 129.1 1099 19. 1125 150.1 11 10.2 117 170.2 119 10.0 121 190.0 1241 200.0 12 210. OV 15" SP 1" SP 17" SP 1" SP 19" SP 20" SP 21" SP 22" SP 2" SP 24" SP 52000 701 1177 157.7 1205 17. 121 177.4 1257 17.2 12 197.5 54000 4 11 14.4 1217 174. 1245 15.1 1270 195.2 1295 205.5 119 215.9 14 22. 5000 9 1199 171.2 122 11.9 1257 192.7 124 20.4 109 214.0 1 224.5 15 25.2 10 24.2 1407 257.9 5000 412 1210 17.2 129 19.2 12 200. 1295 211.5 122 222. 14 2. 170 244.5 19 255.5 141 2. 1440 27. 0000 4270 122 15.7 1251 19.7 1279 20.0 10 219.5 1 21.1 159 242. 1 254.1 140 25. 1429 27. 1451 2.1 2000 441 127 19.7 12 204.7 1290 21.1 117 227. 144 29. 170 251. 195 2.5 1420 275. 1442 27.1 144 29.7 4000 4555 1252 202.2 1277 21.2 10 224. 129 2. 155 24. 11 20.5 140 272.9 141 25.2 1455 297.5 147 09. 000 49 12 211. 1292 222. 117 2.7 142 245.4 17 257.5 192 29. 1417 22. 1442 295.0 147 07.7 10 20.4 000 440 12 220.9 109 21.9 12 24. 15 255.0 10 27.1 1404 279.5 1429 292.1 145 05.0 1477 1.0 1501 1.1 70000 2 104 21.2 12 242.1 14 25.5 171 25.2 194 277. 1417 29.7 1441 02.4 145 15. 14 2.5 1512 41.9 72000 5125 122 242.1 144 25.0 15 24. 17 27.0 1409 2.1 141 00.4 1454 1.2 1477 2.2 1500 9.4 152 52.9 74000 527 142 25.4 12 24.5 1 275. 1404 27.4 1425 299.5 1447 11.9 14 24. 10 7. 151 50.9 155 4.5 7000 5409 12 25. 12 27. 1402 2.0 1422 299. 1442 11.5 14 2.9 144. 1505. 152 2.9 154 7.5 7000 5552 12 277.7 1401 29.1 1421 00.7 1440 12.4 140 24.4 140. 1500. 1520 2. 1541 75. 152 9.2 0000 594 1402 290.5 1422 02.2 1441 1.9 140 25. 1479 7.9 1 50.2 1517 2.7 157 75.7 155 9.0 157 402. 2000 5 142 0. 1442 15.7 141 27.7 1479 9. 1 52.0 151 4. 155 7.9 1554 9. 157 40.1 1592 41. 4000 5979 1444 17. 14 29. 141 42.0 19 54.2 1517. 155 79.1 155 91. 1572 404.7 1590 417.9 109 41.4 000 121 145 1.7 144 44. 1502 5. 1520 9. 157 1. 1555 94.5 157 407. 1590 420. 10 4.5 12 447.0 DESIGN 10A Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Performance ratings do not include the effects of appurtenances in the air stream. 11

CHICAGO BLOWER BACKWARD INCLINED FAN SIZE 54-1/4 5-1/2 In. Wheel Diameter 17.24 Sq. Ft. Outlet Area CHICAGO BLOWER BACKWARD INCLINED FAN SIZE 4-/4 In. Wheel Diameter 0 21.0 Sq. Ft. Outlet Area Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. 12 Max. RPM CLASS II Max. RPM CLASS III 1052 Peak BHP = 174.9(RPM 1000) Tip Speed (fpm) = 15.2 x RPM OV 1/2" SP 1" SP 1-1/2" SP 2" SP 2-1/2" SP " SP -1/2" SP 4" SP 4-1/2" SP 5" SP 20000 110 24 2.7 291 4.2.1 2000 14 271.5 10 5.2 4 7.1 7 9. 420 11.5 2000 150 29 4.5.4 5.4 400 10.7 44 1.1 44 15. 29000 12 22 5.7 5 7.9 10.0 415 12. 447 14.9 47 17. 505 20.4 51 2.2 2000 15 50 7.1 79 9.5 409 11.9 45 14. 42 1. 0 19.7 519 22.7 545 25. 59 2. 59 2.0 5000 200 7. 404 11.4 42 14.1 457 1.7 41 19. 50 22.1 52 25.2 55 2.5 5 1.9 0 5.2 000 2204 407 10. 429 1. 455 1.5 40 19. 50 22.1 525 25.0 54 2.0 571 1.4 595 4.9 19.5 41000 27 4 1.1 45 1.0 479 19.2 50 22. 525 25. 54 2. 5 1.4 5 4.7 09. 2 42.0 44000 2552 45 15.7 4 1. 504 22.1 527 25.5 54 2.9 5 2.1 5 5. 07. 2 42.1 4 45.9 47000 272 5 1.7 511 22.0 50 25.4 551 29.1 572 2.7 591.2 10 9. 2 4.1 4 4. 4 50. 50000 2900 524 22.1 59 25.5 55 29.1 575 2.9 595. 15 40.7 44. 50 4.0 7 51. 4 55.4 5000 074 554 25.9 5 29.4 5.2 01 7.2 19 41. 45.4 5.4 7 5. 9 57.2 705 1.1 5000 24 54 0.1 597. 11 7. 27 41.9 44 4.2 2 50. 0 54.9 9 59.1 712.2 72 7. 59000 422 14 4.7 2.7 9 42. 54 47.0 70 51.5 5.1 70 0.7 720 5.2 7 9. 751 7.9 2000 59 44 9.9 55 44.0 4. 1 52.7 9 57. 711 2.1 727.9 74 71.7 759 7.5 774 1.1 5000 770 74 45.5 5. 9 54. 709 5. 722. 77. 752 7. 77 7. 72.7 797. OV 5-1/2" SP " SP 7" SP " SP 9" SP 10" SP 11" SP 12" SP 1" SP 14" SP 000 2204 42 42.2 2 45. 702 5.2 41000 27 54 45.9 7. 715 57. 751 5. 44000 2552 7. 5.9 729 2. 75 70.7 799 79.1 47000 272 54.2 702 5. 741 7.1 779 7.1 1 5.0 44 9.9 50000 2900 701 59. 71.4 754 72.1 791 1.5 27 91.1 59 100. 9 110.0 920 120.0 5000 074 721 5.0 77 9.1 770 77. 04 7.2 9 97.2 7 107.4 904 117.5 92 127.5 90 17.7 5000 24 74 71. 75 75.5 7 4.2 20 9. 52 10. 5 114.1 917 124.9 947 15. 975 14.1 1001 15. 59000 422 75 7.2 70 2.5 0 91. 7 100.7 7 110.7 9 121. 929 12. 90 14. 99 155.0 101 1.2 2000 59 7 5. 02 90.1 29 99.2 5 10. 4 11.5 91 129.1 942 140.2 972 151. 1002 1.7 100 175. 5000 770 11 9.5 25 9.2 51 107.7 77 117. 90 127.2 90 17.7 957 14.9 95 10.5 1014 172. 1042 15.0 000 944 5 101. 4 10. 74 11.7 99 12. 924 1. 9 147. 974 15. 1001 170.0 1027 12.1 71000 411 5 110.5 72 115.9 97 12.4 922 1.7 945 147.1 99 157.7 99 1.7 101 10. 104 192.5 74000 4292 2 119.7 95 125.4 921 1.5 945 147. 9 15.1 990 19.0 101 10.1 10 191. 77000 44 90 129.4 919 15.4 944 147.1 9 15. 990 19. 101 11.0 104 192. 0000 440 90 19. 942 145.9 97 15. 991 170. 1014 12.1 105 19.7 000 414 955 150.5 97 157.0 991 19.9 1014 12. 107 195.0 Max. RPM CLASS II 75 Max. RPM CLASS III 951 Peak BHP = 290.4(RPM 1000) Tip Speed (fpm) = 1.95 x RPM OV 1/2" SP 1" SP 1-1/2" SP 2" SP 2-1/2" SP " SP -1/2" SP 4" SP 4-1/2" SP 5" SP 24000 1140 221.1 21 5.0 02 7. 2000 10 244 4.2 279. 14. 11. 79 14.0 2000 1519 29 5.5 01.0 1 10.4 2 1.1 9 1.2 419 19.2 000 1709 294 7.1 24 9.9 51 12. 7 15. 405 1.5 4 21.9 459 25. 41 2. 40000 199 22 9.1 4 12.2 74 15.2 97 1.1 421 21.2 44 24.7 471 2.5 5 2. 517.1 57 40.0 44000 209 11.5 72 14.7 97 1.2 419 21.4 440 24. 42 2.1 44 1.9 50 5.9 50 40.2 552 44.4 4000 2279 7 14. 97 17.7 420 21.5 442 25.1 42 2. 41 2.2 501 5.9 522 40.0 54 44. 54 4.9 52000 249 40 17.5 424 21.2 444 25.2 45 29.2 45.1 50.9 521 40.7 59 44.7 55.1 577 5.7 5000 259 45 21. 451 25.2 49 29.4 4.7 50.0 525 42.1 542 4.2 559 50.4 57 54.7 59 59.2 0000 2 45 25. 47 29.7 4 4.1 512.7 51 4.4 54 47.9 55 52. 51 5.7 59 1.1 12 5.7 4000 09 4 0.5 507 4. 521 9.4 57 44.2 554.2 571 54.2 5 59.0 0.7 1. 2 7.0 000 229 52.0 55 40.5 54 45. 5 50.4 57 55. 595 0.9 11.1 2 71.2 40 7.2 54 1.1 72000 419 552 42.1 54 4.9 57 52.0 59 57.2 0 2.7 1.2 4 7. 79.4 4.7 77 90.0 7000 09 52.0 59 54.0 04 59. 1 4.7 29 70.4 4 7.2 57 2.1 72.0 9. 700 99.5 0000 799 12 5. 22 1.9 2 7. 4 7.0 55 7. 4.9 1 91.1 95 97. 709 10.5 722 109. OV 5-1/2" SP " SP 7" SP " SP 9" SP 10" SP 11" SP 12" SP 1" SP 14" SP 45000 217 574. 592 54.0 000 227 57 54.7 07 59.4 41.7 5000 2517 00 59. 19 4. 5 75.0 5.0 719 95.4 57000 2707 15 5. 2 70. 1. 702 92.2 72 10.0 71 11.9 1000 29 2 72.2 4 77.2 1.0 714 99.4 74 111.1 77 122.7 02 14.2 0 14.5 5000 0 52 79. 4. 9 95.5 727 107.0 75 119.2 79 11.7 17 144.1 4 15.4 1.9 9000 27 7. 7 9.4 714 104.1 742 115. 771 127.9 01 140.7 0 154.0 57 17.2 2 10. 90 19. 7000 4 95 97. 70 102.9 74 11. 70 125.2 7 17.5 14 150.4 42 14.0 70 17.0 9 192.0 921 205.9 77000 5 71 107. 71 11.2 755 124.4 779 1.0 04 14.2 29 11.1 55 174. 2 19.0 90 20. 94 21.5 1000 4 741 11. 75 124.2 777 1.0 00 147.9 2 10.2 47 17.0 71 1. 95 200.9 920 215. 94 21.1 5000 40 74 129. 77 1.0 00 14.4 22 10. 44 17. 1. 199. 911 214.0 94 22.9 9000 422 77 141.5 799 14.4 22 11. 44 174. 5 17. 200.7 907 214. 929 22.5 950 24. 9000 441 10 154.2 22 11.4 45 175. 7 19. 202. 90 21.4 92 20.2 94 244.4 97000 40 4 17.7 4 175.2 190.2 90 204. 910 219.0 90 2.0 9 247.2 101000 479 59 12.0 70 19.9 91 205. 91 221.0 9 2.0 Performance ratings do not include the effects of appurtenances in the air stream.

CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS II 7 SIZE 71-/1 In. Wheel Diameter Peak BHP = 4.(RPM 1000) 25. Sq. Ft. Outlet Area Tip Speed (fpm) = 1.4 x RPM OV 1/4" SP 1/2" SP /4" SP 1" SP 1-1/2" SP 2" SP 2-1/2" SP " SP -1/2" SP 4" SP 25000 91 12 2.0 14 2.9 205.9 227 5.1 29000 11 11 2.7 201. 219 4.9 27.0 274. 000 1295 201. 21 4. 25.1 251 7. 24 10.1 1 1. 7000 1452 221 4.7 2.1 25 7.5 27.9 295 11.7 25 15.1 5 1. 7 22.2 41000 10 24.1 255 7. 270 9.2 24 10.7 10 1.7 5 17.1 20.9 24. 410 2.7 45000 175 24 7.7 275 9. 2 11.0 01 12. 2 1.1 19.5 7 2. 97 27.5 421 1. 441.0 000 1922 2 9.7 29 11.4 07 1.2 19 15.1 4 1. 4 22.4 5 2.2 407 0.4 40 4.9 452 9.7 5000 2079 0 12.0 17 1. 27 15.7 7 17.7 0 21. 1 25.7 400 29. 420. 440.4 41 4. 57000 22 0 14. 1.5 47 1.5 5 20. 77 25.1 9 29. 41.5 44 7.7 452 42. 471 47.2 1000 29 52 17. 0 19. 21.7 7 24.0 95 2. 415. 4 7. 450 42. 47 4.9 44 51. 5000 2550 75 21.0 1 2.1 25.4 9 27.7 414 2. 42 7.7 450 42. 4 47. 42 52.1 57.0 9000 2707 97 24. 40 27.1 410 29.4 417 1.9 4 7.0 450 42. 47 47. 44 52. 9 57. 514 2. 7000 24 419 29.1 425 1.5 41.9 4.5 452 41. 4 47.4 45 5.1 501 5. 51 4.0 50 9. 77000 021 441.9 447.4 45.9 459 41. 472 47.1 47 52.9 502 5.9 51 4.9 5 70.7 547 7. 1000 17 44 9.1 49 41. 475 44.5 40 47.2 2 52.9 50 59.0 520 5.2 55 71.5 550 77.7 54. 5000 5 4 44.9 1 47.7 50.5 502 5.4 51 59.4 525 5.5 59 72.0 55 7. 57 5.2 51 91.7 OV 4-1/2" SP 5" SP 5-1/2" SP " SP -1/2" SP 7" SP 7-1/2" SP " SP -1/2" SP 9" SP 5000 2079 42 4.4 501 5.4 51 5.4 55.5 57000 22 1 52.5 511 57.9 529.4 54. 52 74.2 57 79.7 1000 29 502 57.0 520 2.5 5. 55 74.2 57 0.0 5 5. 0 91.5 1 97.5 5000 2550 514 2.2 51 7.7 54 7.5 55 79. 52 5. 599 92.1 14 9. 2 104.4 42 110. 5 11.9 9000 2707 52.1 544 7. 559 9.4 575 5.5 591 91. 0 9.4 24 105.0 9 111. 5 11.2 124.7 7000 24 544 74.7 55 0.2 572.0 57 92.1 02 9.4 17 105.0 2 111. 4 11. 125. 77 12. 77000 021 50 1.9 574 7.5 57 9.4 00 99.4 14 105.7 2 112. 4 119.2 57 12. 72 1.5 140.9 1000 17 577 9.7 590 95.5 0 101.5 15 107. 2 11.9 41 120.5 54 127. 14.4 2 141.7 5000 5 594 9.0 07 104.1 19 110. 1 11. 4 12.0 55 129.5 7 1. 0 14.4 9000 2 12 10. 24 11. 119. 47 12. 59 12. 70 19.5 2 14. 9000 4 29 11.1 41 12.0 5 129.9 4 1. 75 14.4 150.2 97000 05 4 125. 5 1.2 70 140.5 1 147. DESIGN 10A CHICAGO BLOWER BACKWARD INCLINED FAN Max. RPM CLASS II 21 SIZE 7-/4 In. Wheel Diameter 7 1.19 Sq. Ft. Outlet Area Peak BHP = 77.41(RPM 1000) Tip Speed (fpm) = 20.2 x RPM OV 1/4" SP 1/2" SP /4" SP 1" SP 1-1/2" SP 2" SP 2-1/2" SP " SP -1/2" SP 4" SP 4000 1090 15.0 177 4. 194 5.5 211 7.0 245 10.2 9000 1250 17 4.0 19 5.5 20 7.0 22.5 254 11.9 22 15. 44000 1411 195 5.4 209 7.0 224.7 2 10. 24 1. 292 17.9 1 22.1 000 1571 215 7.0 227. 240 10.7 25 12.5 27 1.2 01 20. 2 24.9 4 29.5 9 4. 54000 171 25 9.0 245 10.9 257 1.0 29 15.1 291 19.0 12 2.2 5 27. 57 2.9 79.1 97 4.2 59000 192 255 11.4 24 1.4 274 15. 25 17.9 07 22. 2 2. 4 1..4 7 42.0 407 47.7 4000 2052 275 14.1 2 1. 292 1. 02 21.1 2 2.0 41 0.7 59 5.4 77 40. 9 4.2 415 52.2 9000 2212 295 17. 0 19. 11 22.1 20 24.7 9 0.0 57 5.2 74 40.2 90 45.4 407 51.0 425 57.0 74000 27 1 21.0 2 2.5 0 2.1 2.7 55 4.4 7 40.1 9 45. 405 51.0 420 5. 4 2. 79000 25 25.2 4 27. 0.5 5. 72 9. 9 45.5 405 51.4 420 57.2 44.0 4 9.0 4000 29 57 29.9 2.7 9 5.5 75.5 90 44. 405 51. 421 57.7 4.9 450 70.0 4 7.2 9000 25 77 5.2.1 9 41.1 94 44.2 407 50.7 422 57. 47 4.5 452 71.2 45 77. 47 4.2 94000 014 9 41.1 40 44.2 40 47.4 414 50. 42 57. 4.5 45 71. 4 79.0 41.1 4 92.9 99000 174 419 47.7 424 50.9 429 54.2 44 57. 445 4. 457 72.0 470 79. 44 7. 7 94.9 509 102. 104000 4 55.0 444 5.4 4 1. 454 5. 44 72. 475 0.2 47.1 500 9.2 51 104. 525 112.2 109000 5 40.0 44.5 49 70.1 47 7.7 4 1.2 9.1 505 97.4 517 105. 529 114.2 541 122.7 OV 4-1/2" SP 5" SP 5-1/2" SP " SP -1/2" SP 7" SP 7-1/2" SP " SP -1/2" SP 9" SP 4000 2052 44 5. 451 4.4 47 70.4 4 7. 9000 2212 44.4 40 70.0 477 7. 2.1 50 9.7 522 9. 74000 27 452 9.0 49 75.7 45 2. 502 9.9 517 97.0 50 10.9 544 111.0 55 11.4 79000 25 4 75. 479 2.1 4 9. 510 9.7 525 104.2 540 111. 554 119.4 57 12. 579 14. 592 142.1 4000 29 47 2. 0 9.4 505 9.5 519 10.9 54 111.7 5 119.7 5 127. 577 15. 590 14. 02 151.7 9000 25 1 90. 504 97. 517 104. 50 112.1 54 119.9 557 127.9 571 1. 55 144. 599 15. 11 11.9 94000 014 50 99. 51 10.7 50 11. 542 121.2 555 129.0 57 17.0 50 145.4 594 154.1 07 12.9 20 171.9 99000 174 521 109.5 5 11.7 544 124.0 55 11.4 57 19.1 579 147.2 591 155. 0 14.2 1 17.1 104000 4 57 119.9 54 127.4 559 15.0 570 142. 51 150.4 592 15.5 0 1. 15 175.4 109000 5 55 10.9 54 1.9 575 14. 5 154.7 59 12.7 0 170.9 17 179.2 114000 55 59 142.5 50 151.0 591 159.4 01 17.7 11 17.0 21 14. 119000 15 55 154.7 59 1. 07 172.7 17 11.4 Performance shown is for installation type B - Free inlet, Ducted outlet. Power ratings (BHP) do not include drive losses. Performance ratings do not include the effects of appurtenances in the air stream. 1

CHICAGO BLOWER BACKWARD INCLINED FAN CLASS II - Arrangements 1 and 9 SIDE ELEVATION (Drive Side) Bottom Horizontal CCW Rotation FRONT ELEVATION FOUNDATION PLAN FOUNDATION PLAN Down Blast Discharge 7 HOLES - 7/ Dia. G* AA Holes 1/2 Dia. Around Discharge *OPTIOL SLIP INLET 4 HOLES 7/ Dia. Arrangement 1 Shown - All Dimensions in Inches. Do Not Use for Construction Unless Certified. E H Size Wheel Dia. Shaft at Bearings Keyway A B D BH, BAU UB, TAU TH TAD only F G* BH BAU UB TAU TH TAD DB K L 54-1/4 0 52-7/ 5-1/2 4-/4 2-15/1-7/1-7/1 /4 x / 7/ x 7/1 7/ x 7/1 47-7/ 5 5-1/2 42-1/2 4-9/1 51-5/1 50-/ 55-1/2 1-1/ -1/4 40 44-1/4 4-1/2 51-/ 5-7/ 7-1/4 74-1/4 2 5-5/ 59-/ 5-7/ 54-7/ 0-/ -7/1 54-/ 59-1/1 5-15/1 50-7/ 5 1-5/ 4-1/4 50-1/1 5 42-15/1 47-1/1 51-1/1 9 42-/4 47-1/1-1/ 41-5/ 45-1/2 7 74-1/2 9 7 71-/1 7-/4-15/1-15/1 1 x 1/2 1x 1/2 4-/ 71-1/ 5-5/1-1/1 7-1/1 74-15/1 4-1/4 5 2-1/ 90-1/4 10-/4 71-7/ 79-1/2 72-1/1 1-/1 72-1/4 0-11/1 7-9/1 75-7/1 1-/ -9/1 5-1/1-9/1 51-9/1 57-/4-5/ 54-/ 79 4 10 10 Size M N P Q R S T BH, BAU UB, TAU TH, TAD U DB only W X Y Z AA DB DB DB DB only only only only BB CC DD FF Min. Sheave Dia. 54-1/4 0 1-7/1 2-15/1-7/ 42-7/ 47-7/1 52-9/1 2-/1 25-1/2 2 27-7/1 29-/4 4-5/1 22-/1 2-11/1 24-11/1 2-/ 5-7/ -/4 29-/ 2-/ -1/2 5-/1 5-15/2 4-1/2 4 4-/ 4-15/1-11/1 4-1/4 9 10 12 11 12 14 4 52 0-1/2 42-1/4 4-9/1 5-7/ 59-9/2 5-1/2 45-/4 50-5/1 55-1/2 4-7/ 4-1/2 5-5/ 15 1 19. 7 -/ 9-7/ 57-/4-7/ 4 0-5/ 4-7/1-7/ 9-15/1 2-/1 27-11/1 4-7/ 50-/ 40-5/ 45-/ 4-5/ -7/1 5-7/1-1/1-15/1 4-1/1 1 14 15 17 4 70 51-1/1 57-1/4 71-25/2 0-/1 0-7/ -1/1 5-7/ 5 20. 21.1 Positions of Discharge and Rotation as Viewed From the Drive Side Arrangement 9 - Mean Drive Centers for Frames Shown Motor Size Frame BH BAU UB TAU TH TAD DB 5 14-145 12-14 21-215 254-25 24-2 24-2 4-5 404-405 -7/ -7/ 7-1/4 7-5/ -1/ -/ -7/ 9-/ 40-5/ -7/ -7/ 7-1/4 7-5/ -1/ -/ -7/ 9-/ 40-5/ 5 5 5-/ 5-7/ -1/4-1/2 7-1/ 7-5/ -7/ -1/ -1/ -/ -7/ 4-1/4 4-/ 5-1/ 5-5/ -7/ 1-7/ 1-7/ 2-1/4 2-5/ -/ -7/ 4-/ 5-5/ 0-/ 0-/ 0-7/ 1-1/ 1-/ 1-7/ 2-/ 4 0 0 0-/ 0-/4 1 1-1/2 2 2-5/ -5/ F/2 F/2 D F/2 H B A W F/2 F/2 D F/2 H A W B 14

CHICAGO BLOWER BACKWARD INCLINED FAN CLASS III - Arrangements 1 and 9 SIDE ELEVATION (Drive Side) Bottom Horizontal CCW Rotation FRONT ELEVATION FOUNDATION PLAN FOUNDATION PLAN Down Blast Discharge 7 HOLES - 7/ Dia. G* AA Holes 1/2 Dia. Around Discharge *OPTIOL SLIP INLET 4 HOLES 7/ Dia. Arrangement 1 Shown - All Dimensions in Inches. Do Not Use for Construction Unless Certified. E H Size Wheel Dia. Shaft at Bearings Keyway A B D BH, BAU UB, TAU TH TAD only F G BH BAU UB TAU TH TAD DB K L 54-1/4 0 52-7/ 5-1/2 4-/4 -/1-7/1-11/1 /4 x / 7/ x 7/1 7/ x 7/1 47-7/ 5 5-9/1 42-1/2 4-9/1 51-5/1 50-/ 55-1/2 1-1/ -1/4 40 44-1/4 4-1/2 51-/ 5-7/ 7-1/4 74-1/4 2 5-5/ 59-/ 5-7/ 54-7/ 0-/ -1/2 54-/ 59-1/1 5-15/1 50-7/ 5 1-5/ 4-1/4 42-15/1 50-1/1 47-1/1 5 51-1/1 9 42-/4 47-1/1-1/ 41-5/ 45-1/2 4-1/4 -/4 74-1/2 9 9 9 Size M N P Q R S T BH, BAU UB, TAU TH, TAD U DB only W X Y Z AA DB DB DB DB only only only only BB CC DD FF Min. Sheave Dia. 54-1/4 0 5-/4 5-7/ 9-7/ 4 47-9/1 52-11/1 2-1/4 25-17/2 2-/2 27-7/1 29-9/2 5-/2 2-/4 2-7/ 2-5/ 2-/ 5-7/ 9-/4 29-/ 2-/ -1/2 5-1/4 5-17/2 4-/2 4 4-/ 4-15/1-11/1 4-1/4-1/2 9 10 12 11 12 14 4 52 0-1/2 42-1/4 4-9/1 5-7/ 59-9/2 5-1/2 45-/4 50-5/1 55-1/2 4-7/ 4-1/2 5-5/ 12.5 1.9 15. Positions of Discharge and Rotation as Viewed From the Drive Side Arrangement 9 - Mean Drive Centers for Frames Shown Size BH BAU UB TAU TH TAD DB Motor Frame 5 14-145 12-14 21-215 254-25 24-2 24-2 4-5 404-405 -7/ -7/ 7-1/4 7-5/ -1/ -/ -7/ 9-/ 40-5/ -7/ -7/ 7-1/4 7-5/ -1/ -/ -7/ 9-/ 40-5/ 5 5 5-/ 5-7/ -1/4-1/2 7-1/ 7-5/ -7/ -1/ -1/ -/ -7/ 4-1/4 4-/ 5-1/ 5-5/ -7/ 1-7/ 1-7/ 2-1/4 2-5/ -/ -7/ 4-/ 5-5/ 0-/ 0-/ 0-7/ 1-1/ 1-/ 1-7/ 2-/ 4 0 0 0-/ 0-/4 1 1-1/2 2 2-5/ -5/ F/2 F/2 D F/2 H B A W F/2 F/2 D F/2 H A W B 15

CHICAGO BLOWER BACKWARD INCLINED FAN CLASS IV - Arrangements 1 and 9 SIDE ELEVATION (Drive Side) Bottom Horizontal CCW Rotation FRONT ELEVATION FOUNDATION PLAN FOUNDATION PLAN Down Blast Discharge 7 HOLES 5/ Dia. Sizes to 7/ Dia. Sizes -1/2 to G* *OPTIOL SLIP INLET Arrangement 1 Shown - All Dimensions in Inches. Do Not Use for Construction Unless Certified. 5 HOLES 5/ Dia. Sizes to 7/ Dia. Sizes -1/2 to AA 1/2 Dia. Holes Around Discharge E H Size Wheel Dia. Shaft at Bearings Keyway A B D BH, BAU UB, TAU TH TAD only F G BH BAU UB TAU TH TAD DB K L 24-1/2 27 0-1/2 40-1/4 44-1/2 24-1/4 2-7/1 29-1/ 2-/ 5-9/1 9-/ 4-7/1 4 52-7/ 2-/1 2-/1 2-7/1 2-7/1 2-15/1 2-15/1-7/1-11/1-15/1 1/2 x 1/4 1/2 x 1/4 5/ x 5/1 5/ x 5/1 /4 x / /4 x / 7/ x 7/1 7/ x 7/1 1 x 1/2 21-7/ 24 2-1/2 29-1/ 2 5-21/2 9-9/2 4-1/2 47-29/2 19 21-/4 2-7/ 2-1/1 29-7/2 2-/2 5-5/2-21/2 42-1/2 22-11/1 25-/4 2-1/4 1-11/1 4-/ 41-11/1 45-7/ 50-/ 1-1/4 19-1/2 22 2-1/2 25 27-1/2 0-1/4-1/4 24-1/4 2-/4 0-1/ 1-/ -1/4 5-1/4 -/4 42-1/4 4-1/2-1/4 5-/4 9-7/1 42-5/ 4 50-1/4 55-1/4 1 7-1/4 24-9/1 27-9/1 0-9/1-9/1-9/1 41-9/1 44-9/1-9/1 5-5/ 2-5/ 2-1/2 1-/1 4-1/1 41-21/2 45-19/2 50-/2 54-29/2 25-1/ 27-/4 0-/ 4-5/1 7-1/2 41-/1 45-1/ -9/1 54-/ 2-1/4 2-1/4 2-/4 2-/1 5-1/ -1/2 42-1/4 4-/ 50-7/ 21-1/ 24-5/1 2-9/1 29-/ 2-1/1 5-1/ -7/1 42-/1 4-1/4 20 24-/ 27-5/1 29-/4 2-5/ 5-11/1 9-/1 42-15/1 19 22-/ 24-7/2 25-5/1 27-1/ 29-11/1 2-7/1 5-5/ 9 20 22-/ 24-7/2 25-5/1 27 29-1/ 1-5/ 4-1/2-1/ 7 40-1/4 4-/4 47-/4 51-/ 51-5/ 57-/ 1-1/ 9-/ 7 10 Size M N P Q R S T BH, BAU UB, TAU TH, TAD U DB only W X DB only Y DB only Z DB only AA DB only BB BH, BAU UB, TAU DB TH, TAD only CC DD FF Min. Sheave Dia. 24-1/2 27 0-1/2 40-1/4 44-1/2 22-/4 24-1/1 25-/ 2 0-1/4 29-5/ 4-/ 5-7/ 40-1/ 19-5/ 21-9/1 2-/4 2-1/2 29-1/ 2 5-1/4-15/1 42-7/ 2-1/2 2-1/2 2-1/2 2-1/2 2-1/2 11-/1 12-5/2 1-1/4 14-5/ 15-15/1 17-/4 19-/ 21-7/2 2-/1 14-9/1 14-27/2 15-1/4 17-1/4 17-1/1 19-5/ 24 24-11/2 25-9/1 1-5/ 1-5/ 20-5/ 22-5/ 25-5/ 24-1/4 2-1/4 29-1/4 4-1/4 15-1/2 1-/4 1-19/2 20-/1 21-7/ 2-7/ 2-1/2 29-1/4 2-/ 12-5/ 1-7/ 15-2/2 17-5/1 19 20-5/ 2-1/ 2 29-1/ -/1 4-5/2-1/4 2-5/ -15/1 -/4 -/ -7/2 -/1 1-/4 2 2-/1 2-2/2-1/4-5/1-11/1 4 4-5/1 5-5/1 2-9/1-7/ 5-5/1-1/2 5-5/1 -/ 5-5/ 4 4 5 7 9 10 4 4 10 10 24 24 0 2 2 40 4 4 17-1/4 19-1/1 21-11/1 24-7/1 2-5/ 29-/1 1-15/1 5-1/ -1/2 12-5/ 1-7/ 15-2/2 17-5/1 19 20-5/ 2-1/ 2 29-1/ 24-1/ 27-9/1 29-7/ -1/1-1/1 40-21/2 44-9/1-1/1 5-7/ 20-9/1 2-7/1 2-1/1 2-7/ 1-/ 4-5/ 7-15/1 41-11/1 45-/4 24-1/4 27-5/ 2-11/1 0-/4 2-7/ -1/ 9-/4 4-7/.0 5.2...5.0.5 9.4 10.2 Positions of Discharge and Rotation as Viewed From the Drive Side F/2 F/2 D F/2 H B A W F/2 F/2 D F/2 H A B W 1 Arrangement 9 - Mean Drive Centers for Frames Shown Size BH BAU UB TAU TH TAD DB 24-1/2 27 0-1/2 40-1/4 44-1/2 Motor Frame RF 12-14 21-215 254-25 24 12-14 21-215 254-25 24-2 21-215 254-25 24-2 24-2 254-25 24-2 24-2 4-5 254-25 24-2 24-2 24-2 24-2 4-5 404-405 24-2 24-2 4-5 404-405 24-2 4-5 404-405 444-445 RF 24-/4 24-1/4 2-/4 2-/ 27-7/ 27-1/4 2-1/2 2 0-7/ 0-1/ 29-1/2 29-5/ 2-/ 1-5/ -7/ -1/4 5-/ 40-/4 9-7/ 9-1/ -1/4 4 45 44-1/ 4-/ 50-/ -1/2 4-1/2 47-/4 RF = Refer to Factory RF 24-1/4 2-/4 2-1/ 22-/4 27-1/ 2-5/ 25-7/ 25-/ 0-1/2 29-5/ 29-1/ 2-1/2-1/ 2-1/2 2 1-1/4-1/2 5-7/ 5-1/ 40-/ 9-1/2 -/4 45-1/2 44-1/2 4-/4 42-7/ 50 4-1/ 47-/ RF 2 22-1/2 22 21-5/ 25-/4 25-1/4 24-5/ 24-1/ 2-/4 2 27-1/2 2-7/ 1-1/4 0-5/ 0-1/ 29-1/2 4-1/4-5/ 7-1/4 -/ 5-/4 42-7/ 42 41-1/ 40-/ 47-1/ 4-1/ 45-1/4 44-1/2 RF 21-1/2 21 20-1/2 24 2-1/2 2 22-1/2 2-1/2 25-/4 25-1/4 24-7/ 2-7/ 2-1/4 27-/4 27-1/4 1-1/2 1 0-/ 4-7/ 4-1/ -/ 2-/4 9-1/2-5/ 7-7/ 7-1/ 4-/ 42-1/2 41-1/2 41 RF 19-7/ 19-1/2 22-/ 21-7/ 21-/ 24-7/ 24-1/4 2-/4 2-/ 27 2-1/2 2 29-1/2 29 2-/ 2-/4 2 1-1/4 0-/4 7-1/ -/ 5-1/2 4-7/ 40-/4 9-7/ 9 -/ RF 20 19-1/2 21-/4 21-1/4 2-1/4 22-5/ 25 24-1/2 24-1/ 27-/ 2-/4 2-1/4 0-1/4 29-1/2 2-7/ 4-/ 2-5/ 2-7/ 2-1/4 7-/4-7/ -1/ 5-1/2 RF 20 19-1/2 21-1/4 21-1/4 2-1/4 22-5/ 25 24-1/2 24 2-1/4 27-5/ 2-7/ 29-5/ 29 2-1/4-1/2 2-/4 2 1-/ 7-1/ -1/4 5-1/2 4-7/ = Not Available

CHICAGO BLOWER BACKWARD INCLINED FAN DESIGN 10A Unitary Base Class II III IV Size F JK TT CH TL TW 54-1/4 0 7 54-1/4 0 24-1/2 27 0-1/2 40-1/4 44-1/2 10-7/ 119-/4 12-1/4 14-1/4* 12-/4* 10-7/ 119-/4 12-1/4 5-7/1 5-1/2 2-7/1-1/2 74-1/2 1-7/ 90-/1 99-/1 10-7/ 9-1/1 9-9/1 10-7/ 107-7/ 115-15/1 9-1/1 9-9/1 10-7/ -5/1 5-9/1 5-1/2-1/2-7/1 70-5/ 7-5/ 9-1/1 9-1/1 95-1/1 10-1/ 110-/ 11-7/1 9-1/1 95-1/1 10-1/ 51-9/1 55-1/1 0-/ 5-/4 70-11/1 72-7/ 0-1/4 5-7/ 9-1/1-1/2-15/1 9-1/1 99-5/ 10-1/4-1/2-15/1 9-1/1 45-7/ 4-5/ 52-1/ 57-1/2 2-/ 5-1/ 7-1/ 7-5/1-1/2 150 10 171 10 19 151-1/1 11-7/1 172-5/1 91-/4 9-/4 104-7/1 110-9/1 121-7/1 12-1/4 15-1/4 14-1/4 151-1/1 Weight (lbs.) 420 1 292 7794 91 5 702 77 1901 1995 250 2797 77 415 529 579 7 Ref. Max. Motor Frame 404T 404T 405T 444T 445T 447T 447T 447T 5T 5T 405T 405T 444T 445T 445T 445T 447T * Shipped as a split housed fan. Maximum dimension to top of wheel; Size - 110", Size 7-120". NOTES: Dimensions shown (in inches) are the maximum values per fan size regardless of rotation, discharge or motor frame/position. For precise rotation, discharge and motor position dimensions, consult your Chicago Sales Engineer. Dimensions are not for construction unless certified. Approximate weights include fan, base, motor, V-belt drive, and belt guard. For belt drive centers, see charts on dimensional pages. 17

Engineering Specifications Design 10A s with Backward Inclined Wheels GENERAL: Provide a high performance, low maintenance, centrifugal fan with backward inclined wheel and hyperbolic wheel cone. shall be licensed to bear the AMCA Certified Ratings Seal for Air Performance based on tests and procedures in accordance with AMCA standard 211. s must be manufactured and assembled in the U.S.A. Acceptable vendors: Chicago Blower Corporation PERFORMANCE: Performance shall include steep pressure and non-overloading horsepower characteristics. Mechanical efficiency shall be no less than 0%. Wheel inlet cone to be designed to ensure smooth, stable air flow across the entire operating range. System static pressure changes of 0% shall result in an approximate 10% volume reduction. HOUSING: housing shall be of welded, heavy gauge construction with seven common discharge positions. Scroll is to be continuously welded. ROTOR: Wheel shall have cast iron hub (steel hub on sizes 40-1/4, 44-1/2 and ) lock bolted to a heavy backplate. Blades must be single sheet, high strength low alloy steel, continuously welded to the backplate and hyperbolic wheel cone. Wheels to be statically and dynamically balanced to G. standards in accordance with ISO 1940 and ANSI S2.19 specifications. Shaft shall be turned, ground and polished 1045 hot rolled steel straightened to a maximum T.I.R. of.002 inches and mounted using heavy duty ball or roller pillow block bearings. Shaft critical speed shall not be less than 1.25 times maximum RPM. MOUNTING: Housing and base assembly complete with integral mounting angles for connection to foundation. Adjustable motor base to be welded to base or channel. FACTORY MOUNTED MOTORS AND DRIVES (Accessory) Motors and drives to be factory mounted. Unit to be tested at running speed for vibration and balance. Filtered vibration readings, taken at bearings, are not to exceed 0.15 inches per second. INLET VOLUME CONTROL (Accessory) Inlet volume control (IVC) device shall be totally enclosed within the inlet cone. IVC device shall be 7-bladed, and pre-spin the incoming air to control volume and pressure. ACCESSORIES (Choose from the following) Slip-fit Inlet Flanged Inlet or Outlet - Punched Holes Companion Flange - Punched or Unpunched - Inlet, Outlet or Both Type C AMCA Spark Resistant Construction 1-1/2" NPT Housing Drain Shaft Seal Quick Clamp or Raised Bolted Access Door Inlet Screen Shaft Cooling Wheel with Guard (Required from 00-00 F) Adjustable Motor Base Shaft and Bearing Guard with Extended Grease Fittings Totally Enclosed Belt Guard with Ventilation Panel Constant or Adjustable Speed V-Belt Drives - minimum 1.2 S.F. Outlet Damper - Parallel or Opposed Blades. Manual Operation with Locking Quadrant. Unitary Base: Heavy channel construction, continuously welded, with fan and motor base welded to insure vibration-free service. Inlet Box: Bolt-on with access door and options for support leg mounting and shop assembly. 1

Chicago Industrial s for Every Application SQB FANS The SQB version of Chicago s Square s has a backward inclined wheel to handle corrosive or dusty airstreams. It is also suited for high temperature airstreams to 50 F. Sizes range from 12-1/4 to 44-1/2 with volumes to 55,00 CFM and pressures to 15" WG. Ask for Bulletin SQB. SQI FANS Using industrial duty radial blades that resist material build-up, the SQI fan is especially suited for sticky, heavy or abrasive applications. With welded heavy steel plate housing, steel wheels and oversize bearings, the SQI is a hard working industrial fan designed for pressures to 1" WG. Inlet diameters from 5" to 17". Options include alternate finishes to meet customer specifications. Ask for Bulletin SQI. INDUSTRIAL CENTRIFUGAL FANS The flat radial blades of Chicago s Design 1A wheels are designed to handle dirty air without material build-up. Welded housing of heavy steel plate stands up to demanding industrial applications and temperatures to 00 F. Wheel diameters to 71", with volumes to 70,000 CFM and pressures to 40" WG. Ask for Bulletin ICF. 19