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Backward Inclined Blowers

FAN SIZE WHEEL DIAMETER SHAFT DIAMETER CLASS 1 CLASS 2 HOUSING GAUGES BAND FACE NO. OF BLADES BACK PLATE WHEEL GAUGES BLADES CLASS 2CLASS 1 END RING FRAME GAUGES DRIVE INLET
105 101/2 3/4 1 20 16 12 10 12 10 14 16
122 121/4 1 13/16 16 16 12 3/16 12 3/16 14 14 16
135 131/2 1 13/16 16 14 12 3/16 12 3/16 14 14 16
150 15 1 13/16 16 14 12 3/16 12 3/16 14 14 16
165 161/2 1 13/16 16 14 12 3/16 10 3/16 14 14 16
182 181/4 13/16 17/16 16 14 12 3/16 10 3/16 14 14 14
200 20 13/16 17/16 14 14 12 3/16 3/16 3/16 14 12 14
222 221/4 13/16 111/16 14 12 12 3/16 3/16 10 14 12 14
245 241/2 17/16 111/16 14 12 12 3/16 3/16 10 14 12 12
270 27 17/16 111/16 14 12 11 3/16 16 16 14 12 12
300 30 111/16 115/16 14 12 11 3/16 16 16 14 12 12
330 33 111/16 115/16 14 12 11 1/4 16 16 14 10 10
365 361/2 115/16 2 3/16 12 10 11 1/4 16 16 14 10 10

ULTRAFAN-PAK 2000 Backward Inclined Blowers are equipped with self-aligning single row ball bearings.

Computerized selections have been The table at right shows the type bearings used for each unit.

NIS-CO Backward Inclined Blowers reserves the right to change bearings of equal ratings.

made on all bearings based on

A – Normal Duty Self-Aligning

radial, thrust and combined loads Ball Bearing Pillow Block with to give 100,000 average life hours

Single Locking Collar (AFMBA L50) on standard units at the maximum design of each Backward Inclined Blower.

Bearings selected have effective seals to retain the lubricant and to prevent against contamination. All have grease fittings for relubrication. Bearings are available for 400,000 Hours (AFMBA L50).

B – Normal Duty C – Medium Duty Self-Aligning Ball Bearing Pillow

Block with Double Locking Collars

NIS-CO Backward Inclined Blowers are built with these features:

Class 1 performance cataloged to 5" WG static pressure. Class 2 performance cataloged to 8.5" WG static pressure. Air delivery ranges from 509 CFM to 32,172 CFM.

Non-overloading performance — the backwardly inclined blade wheel gives a brake horsepower that levels off at a point to allow economical selection of motors that will not overload if system pressure drops. The top four sizes have airfoil blades.

Easy installation and maintenance — the self-contained, completely packaged units allow easy access to motor, drive and bearings for ease in installation, lubrication, belt adjustment and wiring.

Rugged construction—heavy gauge all-welded steel construction. Discharge position on all sizes may be rotated to any of eight 45° positions.

FAN SIZE STANDARD 100,000 HOURS SPECIAL 400,000 HOURS
105 A A
122 A B
135 A B
150 A C
165 A C
182 A C
200 A C
222 A C
245 A C
270 A C
300 A C
330 A C
365 A C

CERTIFIED PERFORMANCE RATINGS

NIS-CO Backward Inclined Blowers certifies that the “ULTRAFAN-PAK 2000” Backward Inclined Blowers shown herein are licensed to bear the AMCA Seal. The ratings shown

are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.

Fan shall be single width, single housing shall be easily rotated to sheave. The belts shall be oil and inlet with backward inclined flat any of eight standard positions. heat resistant. blade wheel on size: 105

• The fan shall have self-aligning • Fan to be arrangement 10, Class I through 245.

ball bearings and the shaft shall or Class II construction (as required).

• Airfoil wheel on size: 270 be ground and polished solid steel • All fans to be manufactured in an

through 365. keywayed. The fan shall have a ISO 9001 Certified Facility.

heavy duty, ball bearing motor

  • CW or CCW rotation as specified.

matched to the fan load and • All fans shall bear the AMCA seal

The fan shall be of welded and furnished at the specified voltage, for air performance. bolted, heavy gauge steel phase and enclosure.

• Fan to be model “B” as construction coated with NIS-CO The fan shall have a drive with a manufactured by NIS-CO Backward Inclined Blowers’ electrostatically applied cast iron adjustable pitch motor Blowers (Hot Springs, NC).

baked polyester coating. The

1. Weather Cover

Covers entire drive side frame and motor. Eliminates need for penthouse or other protection outdoors. Fastens

securely with screws.

2. Belt Guard

Covers the drives and entire frame end. Constructed of heavy gauge expanded metal mesh with welded

steel frame. Securely

fastened with screws to Backward Inclined Blower

3. Automatic Discharge Shutter

Self-contained in adapter sleeve and securely attached to fan discharge. All materials resistant to weather corrosion. Constructed to prevent

backdrafts and

at the bottom and gasketed.

Bolted Door

5. Vibration Rail Bases

Shock mounting rubber-in-shear rails or pads and spring rails or pads are

6. Other Accessories

All size Backward Inclined Blowers are available with extra features such as: inlet vanes, drain fittings, inlet or discharge screens, flanged inlets or outlets, and heat slingers. Protective coatings are also available. Also available in spark resistant construction.

Quick-Opening Door

RPM 3 TIP SPEED (FPM) = 2.749 x RPM OUTLET .636 Sq. Ft. Inside MAX. HP = .0387

{ (1000 )

113/4" x 8" Outside

B-105

WHEEL DIAMETER —101/2" INLET .894 Sq. Ft. Inside MAX. RPM{127/8" Dia. Outside CL.1 3623

CL.2 4724

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
509 572 636 800 900 1000 965 1034 1106 0.03 0.04 0.05 1177 1227 1283 0.06 0.07 0.08 1369 1407 1451 0.09 0.10 0.11 1545 1574 1609 0.13 0.14 0.15 1709 1729 1757 0.16 0.18 0.19 — 1876 1898 — 0.22 0.23 — — 2159 — — 0.33 — — — — — — — — — — — — — — — — — —
700 763 827 1100 1200 1300 1183 1261 1342 0.06 0.07 0.09 1345 1411 1481 0.09 0.11 0.12 1502 1557 1618 0.13 0.14 0.16 1651 1698 1750 0.17 0.18 0.20 1792 1832 1878 0.21 0.23 0.25 1926 1961 2001 0.25 0.27 0.29 2178 2204 2234 0.35 0.37 0.40 2412 2429 2452 0.46 0.48 0.51 — 2641 2658 — 0.60 0.62 — — 2853 — — 0.75
890 954 1018 1400 1500 1600 1425 1509 1594 0.10 0.12 0.14 1554 1629 1707 0.14 0.16 0.18 1682 1749 1820 0.18 0.20 0.23 1807 1867 1931 0.23 0.25 0.28 1928 1982 2040 0.27 0.30 0.33 2046 2095 2148 0.32 0.35 0.38 2270 2310 2354 0.42 0.45 0.49 2481 2514 2551 0.54 0.57 0.60 2680 2707 2739 0.66 0.69 0.73 2870 2892 2919 0.79 0.82 0.86
1081 1145 1208 1700 1800 1900 1681 1768 1856 0.17 0.19 0.22 1786 1867 1949 0.21 0.23 0.27 1892 1967 2044 0.25 0.28 0.32 1998 2067 2139 0.30 0.34 0.37 2102 2166 2233 0.36 0.39 0.43 2204 2264 2326 0.41 0.45 0.48 2403 2454 2509 0.52 0.56 0.60 2593 2637 2686 0.64 0.68 0.73 2774 2814 2857 0.77 0.82 0.86 2949 2983 3021 0.91 0.95 1.00
1272 1336 1399 2000 2100 2200 1945 2033 2121 0.25 0.29 0.33 2032 2116 2201 0.30 0.34 0.38 2122 2202 2283 0.35 0.39 0.43 2213 2288 2365 0.41 0.45 0.49 2302 2374 2447 0.46 0.51 0.55 2391 2459 2529 0.52 0.57 0.61 2567 2627 2690 0.65 0.70 0.75 2737 2792 2849 0.78 0;83 0.89 2903 2952 3003 0.91 0.97 1.03 3063 3107 3154 1.06 1.12 1.18
1463 1526 1654 2300 2400 2600 2210 2298 2475 0.37 0.41 0.51 2287 2373 2548 0.42 0.47 0.57 2365 2447 2615 0.47 0.52 0.63 2443 2523 2685 0.53 0.58 0.70 2522 2598 2754 0.60 0.65 0.76 2600 2673 2824 0.66 0.72 0.84 2755 2822 2962 0.80 0.86 0.98 2908 2970 3099 0.94 1.01 1.14 3058 3115 3235 1.09 1.16 1.30 3204 3257 3369 1.24 1.31 1.46
1781 1908 2035 2800 3000 3200 2655 2841 3027 0.63 0.77 0.93 2725 2902 3078 0.70 0.84 0.99 2786 2960 3135 0.76 0.90 1.07 2850 3018 3189 0.82 0.97 1.14 2915 3078 3244 0.90 1.05 1.21 2979 3138 3301 0.97 1.12 1.29 3108 3259 3414 1.13 1.28 1.46 3236 3379 3527 1.29 1.46 1.64 3363 3498 3639 1.46 1.63 1.82 3489 3617 3751 1.63 1.81 2.01
2162 3400 3200 1.09 3255 1.17 3311 1.25 3362 1.32 3413 1.40 3466 1.49 3573 1.66 3679 1.84 3785 2.04 3890 2.23
VOL. OUTLET VEL. 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
CFM FPM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1208 1900 3181 1.15 3335 1.31 3485 1.47 3630 1.63 3772 1.81 3910 1.98 4045 2.17 4176 2.36
1272 2000 3218 1.21 3368 1.36 3515 1.53 3657 1.70 3796 1.87 3931 2.05 4063 2.24 4192 2.43 4319 2.63 4443 2.83
1336 2100 3258 1.27 3405 1.43 3548 1.59 3687 1.76 3823 1.94 3955 2.12 4085 2.31 4212 2.50 4336 2.70 4458 2.91
1399 2200 3301 1.33 3444 1.50 3584 1.66 3720 1.84 3853 2.01 3983 2.20 4110 2.39 4235 2.58 4357 2.78 4477 2.99
1463 2300 3347 1.40 3487 1.57 3623 1.74 3756 1.91 3886 2.09 4013 2.28 4138 2.47 4261 2.67 4380 2.87 4498 3.08
1526 2400 3396 1.47 3532 1.64 3665 1.81 3795 1.99 3922 2.18 4047 2.37 4169 2.56 4289 2.76 4407 2.96 4523 3.17
1654 2600 3500 1.63 3629 1.81 3756 1.98 3880 2.17 4002 2.36 4122 2.55 4239 2.75 4355 2.96 4468 3.16 4580 3.38
1781 2800 3613 1.81 3736 1.99 3856 2.17 3975 2.36 4091 2.56 4206 2.76 4319 2.96 4430 3.17 4540 3.39 4647 3.60
1908 3000 3734 2.00 3850 2.19 3965 2.38 4078 2.58 4189 2.78 4299 2.98 4408 3.19 4515 3.41 4620 3.63 4724 3.85
2035 3200 3862 2.21 3972 2.41 4081 2.61 4189 2.81 4295 3.02 4401 3.23 4505 3.45 4607 3.67 4709 3.89
2162 3400 3995 2.44 4100 2.64 4204 2.85 4306 3.06 4408 3.28 4509 3.50 4609 3.72 4708 3.95
2290 3600 4134 2.68 4234 2.90 4332 3.12 4430 3.34 4528 3.56 4624 3.79 4720 4.02
2417 3800 4278 2.95 4372 3.18 4466 3.40 4560 3.63 4653 3.87
2544 4000 4425 3.24 4515 3.48 4605 3.71 4694 3.95
2671 4200 4576 3.56 4662 3.80

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not include transmission losses.

Performance ratings do not include the effectsof appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers

Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 3.207 x RPM OUTLET .858 Sq. Ft. Inside MAX. HP = .1009

{ (1000 )

131/4" x 95/8" Outside

B-122

WHEEL DIAMETER —121/4" INLET .921 Sq. Ft. Inside MAX. RPM{131/4" Dia. Outside CL.1 2978

CL.2 3883

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
686 772 858 800 900 1000 756 804 856 0.04 0.05 0.06 955 981 1015 0.08 0.09 0.10 1155 1174 0.13 0.15 — — 1328 — — 0.10 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
944 1030 1115 1100 1200 1300 911 968 1025 0.08 0.09 0.11 1056 1101 1151 0.12 0.13 0.15 1201 1234 1273 0.16 0.18 0.20 1344 1367 1396 0.22 0.24 0.26 1482 1497 1518 0.28 0.30 0.32 — 1623 1638 — 0.36 0.39 — — — — — — — — — — — — — — — — — — — — — — — —
1201 1287 1373 1400 1500 1600 1084 1143 1204 0.13 0.15 0.17 1203 1258 1313 0.18 0.20 0.23 1317 1364 1414 0.23 0.25 0.28 1431 1470 1513 0.28 0.31 0.34 1545 1576 1613 0.34 0.37 0.41 1657 1683 1713 0.41 0.44 0.48 1876 1891 1910 0.56 0.59 0.63 — 2090 2102 — 0.76 0.80 — — — — — — — — — — — —
1459 1544 1630 1700 1800 1900 1266 1328 1392 0.20 0.23 0.26 1370 1428 1486 0.26 0.29 0.32 1466 1520 1575 0.32 0.35 0.39 1559 1608 1660 0.38 0.42 0.46 1653 1696 1743 0.44 0.48 0.53 1747 1785 1827 0.51 0.55 0.60 1934 1963 1995 0.67 0.71 0.76 2118 2138 2162 0.84 0.89 0.93 2296 2310 2327 1.03 1.07 1.13 — 2476 2488 — 1.28 1.33
1716 1802 1888 2000 2100 2200 1456 1520 1583 0.30 0.34 0.38 1545 1604 1664 0.36 0.40 0.45 1631 1688 1746 0.43 0.48 0.53 1713 1767 1822 0.50 0.55 0.61 1792 1843 1895 0.58 0.63 0.68 1871 1918 1967 0.65 0.70 0.76 2031 2070 2112 0.81 0.87 0.93 2190 2222 2257 0.99 1.04 1.11 2349 2374 2402 1.18 1.24 1.30 2504 2523 2546 1.39 1.45 1.51
1973 2059 2231 2300 2400 2600 1647 1711 1839 0.43 0.48 0.59 1725 1787 1913 0.50 0.55 0.67 1804 1863 1982 0.58 0.64 0.76 1879 1935 2051 0.66 0.72 0.85 1949 2004 2116 0.74 0.81 0.95 2018 2071 2179 0.83 0.89 1.04 2156 2203 2302 0.99 1.07 1.22 2295 2336 2424 1.18 1.25 1.41 2434 2469 2546 1.37 1.45 1.62 2573 2602 2669 1.58 1.66 1.83
2402 2574 2746 2800 3000 3200 1970 2104 2238 0.72 0.88 1.06 2040 2168 2296 0.82 0.98 1.15 2103 2227 2353 0.90 1.07 1.25 2168 2287 2408 1.00 1.17 1.36 2231 2347 2465 1.10 1.28 1.47 2291 2405 2521 1.20 1.38 1.58 2407 2515 2627 1.40 1.60 1.81 2520 2622 2728 1.60 1.81 2.04 2633 2727 2827 1.81 2.03 2.27 2747 2833 2926 2.03 2.25 2.50
2917 3400 2369 1.25 2423 1.35 2480 1.47 2531 1.57 2584 1.69 2638 1.81 2740 2.05 2838 2.29 2932 2.53 3025 2.77
VOL. CFM OUTLET VEL. FPM 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1802 1888 1973 2100 2200 2300 2670 2688 2710 1.67 1.74 1.81 2814 2828 2845 1.90 1.97 2.05 — 2965 2978 — 2.21 2.29 — — 3108 — — 2.55 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
2059 2231 2402 2400 2600 2800 2734 2792 2861 1.89 2.06 2.26 2865 2915 2976 2.13 2.30 2.50 2995 3036 3089 2.38 2.56 2.76 3122 3157 3203 2.63 2.82 3.03 3246 3275 3315 2.90 3.09 3.31 3392 3426 3.37 3.59 — 3507 3536 — 3.67 3.89 — 3621 3645 — 3.97 4.19 — — 3752 — — 4.50 — — 3858 — — 4.82
2574 2746 2917 3000 3200 3400 2939 3026 3118 2.48 2.74 3.02 3046 3125 3212 2.73 2.99 3.28 3153 3225 3305 2.99 3.25 3.54 3259 3325 3399 3.26 3.52 3.82 3365 3425 3494 3.54 3.81 4.10 3471 3525 3588 3.83 4.10 4.40 3575 3624 3682 4.13 4.40 4.71 3679 3723 3775 4.44 4.72 5.02 3782 3820 3869 4.76 5.04 5.35 3883 — — 5.08 — —
3089 3260 3432 3600 3800 4000 3216 3319 3425 3.33 3.67 4.04 3304 3402 3504 3.60 3.94 4.32 3393 3486 3584 3.87 4.22 4.61 3481 3569 3663 4.14 4.51 4.90 3570 3653 3742 4.43 4.80 5.20 3659 3737 3822 4.73 5.10 5.50 3748 3821 — 5.04 5.41 — 3837 — — 5.36 — — — — — — — — — — — — — —
3604 3775 3947 4200 4400 4600 3534 3645 3757 4.43 4.85 5.30 3610 3718 3828 4.73 5.16 5.63 3686 3791 — 5.03 5.47 — 3761 3863 — 5.33 5.79 — 3836 — — 5.63 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
4118 4800 3871 5.78

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not includetransmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 3.534 x RPM OUTLET 1.049 Sq. Ft. Inside MAX. HP = .1567

{ (1000 )

145/8" x 103/4" Outside

B-135

WHEEL DIAMETER —131/2" INLET 1.108 Sq. Ft. Inside MAX. RPM{141/2" Dia. Outside CL.1 2702

CL.2 3524

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
839 944 1049 800 900 1000 686 730 777 0.05 0.06 0.08 867 890 921 0.10 0.11 0.12 1048 1066 0.16 0.18 — — 1205 — — 0.24 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
1154 1259 1364 1100 1200 1300 827 878 930 0.09 0.11 0.13 958 999 1044 0.14 0.16 0.19 1090 1120 1155 0.20 0.22 0.25 1220 1241 1267 0.26 0.29 0.31 1345 1359 1378 0.34 0.36 0.39 — 1473 1486 — 0.44 0.47 — — — — — — — — — — — — — — — — — — — — — — — —
1469 1574 1678 1400 1500 1600 984 1037 1092 0.15 0.18 0.21 1092 1141 1192 0.21 0.24 0.28 1195 1237 1283 0.27 0.31 0.34 1298 1334 1373 0.34 0.38 0.42 1402 1430 1463 0.42 0.45 0.49 1504 1527 1554 0.50 0.54 0.58 1702 1716 1733 0.68 0.72 0.77 — 1897 1907 — 0.93 0.97 — — — — — — — — — — — —
1783 1888 1993 1700 1800 1900 1148 1205 1263 0.24 0.27 0.31 1243 1296 1348 0.31 0.35 0.39 1330 1379 1429 0.38 0.43 0.48 1415 1459 1506 0.46 0.51 0.56 1500 1539 1581 0.54 0.59 0.64 1585 1620 1657 0.62 0.67 0.73 1755 1781 1810 0.81 0.86 0.92 1922 1940 1962 1.02 1.08 1.13 2083 2096 2112 1.25 1.30 1.37 — 2247 2258 — 1.55 1.61
2098 2203 2308 2000 2100 2200 1321 1379 1437 0.36 0.41 0.46 1402 1456 1510 0.44 0.49 0.55 1480 1532 1584 0.53 0.58 0.64 1554 1603 1654 0.61 0.67 0.74 1626 1672 1720 0.70 0.76 0.83 1698 1741 1785 0.79 0.86 0.93 1843 1878 1916 0.98 1.05 1.13 1988 2016 2048 1.20 1.27 1.34 2131 2154 2180 1.43 1.50 1.58 2272 2290 2311 1.68 1.76 1.84
2413 2518 2727 2300 2400 2600 1495 1552 1668 0.52 0.58 0.72 1566 1622 1736 0.61 0.67 0.82 1637 1690 1798 0.70 0.77 0.92 1705 1756 1861 0.80 0.88 1.04 1769 1819 1920 0.90 0.98 1.15 1832 1879 1978 1.00 1.08 1.26 1957 1999 2089 1.21 1.29 1.49 2082 2119 2199 1.43 1.52 1.72 2209 2240 2311 1.67 1.76 1.96 2334 2361 2422 1.92 2.02 2.22
2937 3147 3357 2800 3000 3200 1787 1909 2030 0.88 1.07 1.28 1851 1967 2083 0.99 1.18 1.40 1908 2020 2135 1.10 1.30 1.52 1967 2075 2185 1.22 1.42 1.65 2024 2130 2236 1.34 1.55 1.79 2079 2182 2287 1.46 1.68 1.92 2184 2282 2384 1.70 1.94 2.20 2287 2379 2475 1.94 2.20 2.48 2389 2475 2566 2.20 2.46 2.75 2493 2571 2655 2.46 2.73 3.04
3567 3400 2150 1.52 2199 1.64 2250 1.78 2297 1.91 2345 2.05 2393 2.19 2487 2.49 2575 2.78 2660 3.08 2745 3.37
VOL. CFM OUTLET VEL. FPM 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2203 2308 2413 2100 2200 2300 2423 2440 2459 2.03 2.11 2.20 2553 2566 2582 2.31 2.39 2.48 2681 2690 2702 2.60 2.69 2.78 — — 2821 — — 3.10 — — 2936 — — 3.42 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
2518 2727 2937 2400 2600 2800 2481 2534 2596 2.29 2.50 2.74 2600 2645 2700 2.58 2.80 3.04 2717 2755 2803 2.88 3.10 3.35 2833 2864 2906 3.20 3.42 3.68 2946 2972 3008 3.53 3.76 4.01 3057 3078 3109 3.86 4.10 4.36 — 3183 3209 — 4.45 4.72 — 3285 3307 — 4.82 5.09 — — 3405 — — 5.47 — — 3501 — — 5.86
3147 3357 3567 3000 3200 3400 2667 2745 2830 3.02 3.33 3.67 2764 2836 2914 3.32 3.63 3.98 2861 2927 2999 3.63 3.95 4.30 2957 3017 3085 3.96 4.28 4.64 3054 3108 3170 4.30 4.62 4.98 3149 3198 3256 4.66 4.98 5.34 3244 3288 3341 5.02 5.35 5.71 3338 3378 3426 5.39 5.73 6.10 3431 3467 3510 5.78 6.12 6.49 3524 — — 6.17 — —
3776 3986 4196 3600 3800 4000 2919 3012 3108 4.05 4.46 4.90 2998 3087 3180 4.37 4.79 5.25 3079 3163 3252 4.70 5.13 5.60 3159 3239 3324 5.03 5.47 5.95 3239 3315 3396 5.38 5.83 6.31 3320 3391 3468 5.75 6.19 6.69 3401 3467 — 6.12 6.57 — 3481 — — 6.51 — — — — — — — — — — — — — —
4406 4616 4825 4200 4400 4600 3207 3307 3409 5.38 5.89 6.44 3276 3374 3474 5.74 6.27 6.83 3344 3440 — 6.10 6.65 — 3413 3505 — 6.47 7.03 — 3481 — — 6.84 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
5035 4800 3512 7.02

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not includetransmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 3.927 x RPM OUTLET 1.280 Sq. Ft. Inside MAX. HP = .2575

{ (1000 )

161/4" x 113/4" Outside

B-150

WHEEL DIAMETER —15" INLET 1.374 Sq. Ft. Inside MAX. RPM{161/8" Dia. Outside CL.1 2458

CL.2 3205

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1024 1152 1280 800 900 1000 631 670 712 0.06 0.08 0.09 791 816 846 0.11 0.13 0.15 — 954 973 — 0.20 0.21 — — 1095 — — 0.30 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
1408 1536 1664 1100 1200 1300 757 803 850 0.11 0.13 0.15 880 918 959 0.17 0.20 0.22 998 1028 1061 0.24 0.27 0.30 1112 1135 1161 0.32 0.34 0.38 1222 1238 1259 0.42 0.43 0.46 — 1338 1353 — 0.55 0.57 — — — — — — — — — — — — — — — — — — — — — — — —
1792 1920 2048 1400 1500 1600 898 947 997 0.18 0.20 0.23 1001 1045 1091 0.25 0.29 0.33 1098 1136 1177 0.34 0.37 0.41 1192 1225 1261 0.42 0.46 0.51 1283 1312 1343 0.51 0.55 0.61 1373 1397 1424 0.60 0.65 0.70 1546 1562 1582 0.85 0.87 0.91 — — 1734 — — 1.20 — — — — — — — — — — — —
2176 2304 2432 1700 1800 1900 1047 1099 1151 0.27 0.31 0.35 1137 1184 1232 0.37 0.41 0.46 1220 1264 1309 0.46 0.51 0.57 1300 1340 1382 0.56 0.61 0.67 1378 1414 1453 0.66 0.72 0.78 1455 1487 1523 0.76 0.83 0.90 1605 1631 1660 0.97 1.05 1.13 1751 1771 1795 1.23 1.29 1.36 1892 1907 1925 1.56 1.59 1.64 — — 2053 — — 1.98
2560 2688 2816 2000 2100 2200 1203 1256 1309 0.39 0.44 0.49 1280 1329 1378 0.51 0.57 0.62 1355 1401 1448 0.63 0.69 0.76 1425 1469 1514 0.73 0.80 0.88 1493 1534 1577 0.84 0.92 0.99 1560 1599 1639 0.96 1.04 1.12 1692 1725 1760 1.21 1.30 1.38 1821 1849 1880 1.45 1.55 1.65 1947 1971 1997 1.71 1.81 1.92 2070 2089 2112 2.03 2.10 2.20
2944 3072 3328 2300 2400 2600 1362 1415 1521 0.55 0.61 0.75 1428 1479 1582 0.69 0.76 0.91 1496 1544 1641 0.83 0.90 1.06 1560 1606 1701 0.95 1.04 1.22 1621 1666 1757 1.08 1.17 1.36 1681 1723 1812 1.20 1.30 1.50 1797 1836 1917 1.48 1.57 1.79 1912 1947 2021 1.76 1.87 2.10 2025 2056 2122 2.03 2.16 2.42 2136 2163 2223 2.32 2.45 2.73
3584 3840 4096 2800 3000 3200 1629 1740 1850 0.91 1.10 1.31 1687 1792 1898 1.08 1.28 1.50 1741 1842 1946 1.25 1.45 1.68 1797 1894 1994 1.42 1.64 1.88 1851 1946 2042 1.58 1.82 2.07 1903 1996 2090 1.73 1.99 2.26 2003 2091 2182 2.03 2.31 2.62 2100 2183 2269 2.35 2.64 2.96 2195 2273 2355 2.69 2.98 3.31 2290 2362 2439 3.03 3.35 3.69
4352 3400 1953 1.52 2004 1.74 2050 1.94 2095 2.14 2140 2.35 2186 2.56 2274 2.95 2358 3.31 2440 3.68 2520 4.06
VOL. OUTLET VEL. 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
CFM FPM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2688 2100 2206 2.46 2320 2.87
2816 2200 2225 2.53 2335 2.91 2443 3.35
2944 2300 2246 2.63 2353 2.99 2458 3.40 2562 3.86
3072 2400 2269 2.75 2373 3.09 2476 3.48 2576 3.92 2675 4.40
3328 2600 2322 3.04 2420 3.36 2517 3.71 2613 4.10 2707 4.54 2799 5.03 2890 5.55
3584 2800 2383 3.37 2476 3.71 2567 4.05 2657 4.40 2747 4.80 2835 5.23 2922 5.71 3008 6.23 3093 6.80
3840 3000 2450 3.72 2537 4.08 2624 4.44 2710 4.80 2794 5.17 2878 5.57 2961 6.00 3044 6.47 3125 6.99 3205 7.54
4096 3200 2522 4.08 2605 4.47 2687 4.86 2768 5.24 2849 5.63 2929 6.02 3008 6.42 3087 6.85 3164 7.32
4352 3400 2599 4.46 2677 4.88 2755 5.29 2833 5.71 2909 6.12 2985 6.53 3061 6.93 3136 7.35
4608 3600 2680 4.89 2754 5.31 2828 5.75 2902 6.19 2975 6.63 3048 7.07 3120 7.50 3192 7.93
4864 3800 2763 5.35 2835 5.78 2905 6.23 2975 6.70 3045 7.16 3115 7.63 3184 8.09
5120 4000 2850 5.86 2918 6.30 2986 6.76 3053 7.23 3120 7.72 3186 8.21
5376 4200 2938 6.41 3004 6.86 3069 7.33 3133 7.81 3197 8.31
5632 4400 3028 7.00 3092 7.47 3155 7.95
5888 4600 3120 7.64 3182 8.13

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not includetransmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers

Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 4.320 x RPM OUTLET 1.560 Sq. Ft. Inside MAX. HP = .4142

{ (1000 )

173/4" x 13" Outside

B-165

WHEEL DIAMETER —161/2" INLET 1.67 Sq. Ft. Inside MAX. RPM{177/8" Dia. Outside CL.1 2235

CL.2 2914

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1248 1404 1560 800 900 1000 573 609 648 0.08 0.09 0.11 719 742 769 0.14 0.16 0.18 — 867 885 — 0.24 0.26 — — 995 — — 0.36 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
1716 1872 2028 1100 1200 1300 688 730 773 0.13 0.16 0.18 800 835 871 0.21 0.24 0.27 908 934 965 0.29 0.33 0.37 1011 1031 1056 0.38 0.42 0.46 1111 1125 1144 0.51 0.53 0.56 — 1216 1230 — 0.67 0.69 — — — — — — — — — — — — — — — — — — — — — — — —
2184 2340 2496 1400 1500 1600 817 861 906 0.21 0.25 0.28 910 950 992 0.31 0.35 0.40 998 1033 1070 0.41 0.45 0.50 1083 1114 1146 0.51 0.56 0.62 1167 1193 1221 0.61 0.67 0.73 1248 1270 1295 0.73 0.78 0.85 1406 1420 1438 1.03 1.06 1.11 — — 1576 — — 1.45 — — — — — — — — — — — —
2652 2808 2964 1700 1800 1900 952 999 1046 0.32 0.37 0.42 1034 1077 1120 0.45 0.50 0.56 1109 1149 1190 0.56 0.62 0.68 1181 1218 1256 0.68 0.74 0.81 1252 1286 1321 0.80 0.87 0.94 1322 1352 1384 0.93 1.00 1.08 1459 1483 1509 1.18 1.27 1.36 1592 1610 1631 1.49 1.56 1.65 1720 1734 1750 1.88 1.92 1.98 — — 1866 — — 2.40
3120 3276 3432 2000 2100 2200 1094 1142 1190 0.47 0.53 0.60 1164 1208 1253 0.62 0.69 0.76 1231 1274 1317 0.76 0.83 0.91 1295 1335 1376 0.89 0.97 1.06 1357 1395 1434 1.02 1.11 1.20 1418 1453 1490 1.17 1.26 1.35 1538 1568 1600 1.46 1.57 1.67 1655 1681 1709 1.75 1.87 2.00 1770 1791 1815 2.07 2.19 2.32 1882 1900 1920 2.46 2.54 2.66
3588 3744 4056 2300 2400 2600 1238 1286 1383 0.67 0.74 0.91 1299 1345 1438 0.83 0.91 1.10 1360 1403 1492 1.00 1.09 1.29 1418 1460 1546 1.16 1.26 1.48 1474 1514 1597 1.30 1.41 1.65 1528 1567 1647 1.46 1.57 1.82 1634 1669 1743 1.79 1.90 2.16 1738 1770 1837 2.13 2.26 2.54 1841 1869 1929 2.46 2.61 2.92 1942 1967 2021 2.80 2.96 3.30
4368 4680 4992 2800 3000 3200 1481 1582 1682 1.10 1.33 1.59 1533 1629 1726 1.31 1.55 1.81 1583 1675 1769 1.51 1.76 2.04 1633 1722 1812 1.72 1.98 2.27 1682 1769 1857 1.91 2.20 2.51 1730 1814 1900 2.10 2.41 2.74 1821 1901 1983 2.46 2.79 3.16 1909 1984 2063 2.84 3.19 3.58 1996 2066 2141 3.25 3.61 4.01 2081 2147 2217 3.67 4.05 4.46
5304 3400 1776 1.84 1822 2.11 1864 2.35 1904 2.59 1946 2.85 1987 3.10 2068 3.57 2144 4.01 2218 4.45 2291 4.91
VOL. OUTLET VEL. 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
CFM FPM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3276 2100 2005 2.97 2109 3.47
3432 2200 2022 3.06 2123 3.53 2221 4.06
3588 2300 2042 3.18 2139 3.61 2235 4.12 2329 4.67
3744 2400 2063 3.33 2158 3.73 2251 4.21 2342 4.74 2432 5.33
4056 2600 2111 3.68 2200 4.07 2288 4.49 2375 4.96 2461 5.49 2545 6.08 2628 6.72
4368 2800 2166 4.08 2250 4.48 2334 4.90 2416 5.33 2497 5.80 2577 6.33 2656 6.91 2735 7.54 2812 8.22
4680 3000 2227 4.50 2307 4.94 2385 5.37 2463 5.81 2540 6.26 2617 6.74 2692 7.26 2767 7.83 2841 8.45 2914 9.13
4992 3200 2293 4.93 2368 5.41 2443 5.88 2517 6.34 2590 6.81 2663 7.28 2735 7.77 2806 8.29 2877 8.85
5304 3400 2363 5.40 2434 5.90 2505 6.41 2575 6.91 2645 7.40 2714 7.90 2783 8.39 2851 8.90
5616 3600 2436 5.91 2504 6.43 2571 6.96 2638 7.49 2705 8.02 2771 8.55 2836 9.07 2901 9.59
5928 3800 2512 6.47 2577 7.00 2641 7.54 2705 8.10 2768 8.67 2831 9.23 2894 9.79
6240 4000 2591 7.09 2653 7.62 2714 8.18 2775 8.75 2836 9.34 2896 9.93
6552 4200 2671 7.75 2731 8.30 2790 8.87 2848 9.45 2907 10.05
6864 4400 2753 8.47 2811 9.04 2868 9.62
7176 4600 2836 9.24 2892 9.83

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not includetransmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers

Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 4.778 x RPM OUTLET 1.899 Sq. Ft. Inside MAX. HP = .6444

{ (1000 )

195/8" x 141/4" Outside

B-182

WHEEL DIAMETER—181/4" INLET 2.02 Sq. Ft. Inside MAX. RPM{195/8" Dia. Outside CL.1 2044

CL.2 2666

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1519 1709 1899 800 900 1000 527 562 599 0.09 0.11 0.14 658 679 705 0.17 0.19 0.22 793 809 0.28 0.31 — — 911 — — 0.42 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
2089 2279 2469 1100 1200 1300 638 677 718 0.16 0.19 0.23 736 769 805 0.25 0.29 0.33 831 857 886 0.35 0.39 0.44 925 944 967 0.46 0.50 0.55 1016 1029 1047 0.59 0.63 0.68 1113 1125 0.77 0.82 — — — — — — — — — — — — — — — — — — — — — — — —
2659 2849 3038 1400 1500 1600 759 801 844 0.27 0.31 0.36 842 880 919 0.38 0.43 0.49 918 952 988 0.49 0.55 0.62 993 1023 1055 0.61 0.67 0.74 1068 1093 1121 0.74 0.81 0.88 1142 1163 1186 0.88 0.95 1.02 1286 1299 1316 1.19 1.26 1.34 1432 1442 1.62 1.70 — — — — — — — — — — — —
3228 3418 3608 1700 1800 1900 888 933 978 0.42 0.48 0.55 959 1000 1040 0.55 0.62 0.69 1026 1064 1103 0.69 0.76 0.85 1089 1124 1161 0.82 0.91 1.00 1151 1183 1217 0.96 1.05 1.15 1213 1242 1273 1.11 1.20 1.30 1335 1358 1383 1.43 1.53 1.63 1456 1473 1493 1.79 1.89 2.00 1574 1586 1601 2.18 2.28 2.39 1697 1707 2.70 2.82
3798 3988 4178 2000 2100 2200 1023 1068 1114 0.63 0.71 0.80 1082 1124 1167 0.77 0.86 0.96 1142 1182 1222 0.94 1.03 1.13 1198 1237 1275 1.09 1.20 1.31 1252 1289 1326 1.25 1.36 1.49 1305 1340 1375 1.41 1.53 1.66 1411 1440 1471 1.75 1.88 2.01 1515 1540 1567 2.12 2.25 2.39 1619 1639 1662 2.52 2.65 2.80 1721 1738 1756 2.94 3.08 3.23
4368 4558 4937 2300 2400 2600 1159 1204 1296 0.90 1.01 1.25 1210 1254 1344 1.06 1.18 1.44 1263 1305 1389 1.24 1.36 1.62 1315 1355 1436 1.43 1.56 1.83 1364 1403 1481 1.61 1.75 2.04 1411 1449 1525 1.79 1.94 2.25 1504 1538 1609 2.16 2.32 2.66 1596 1626 1691 2.54 2.71 3.07 1687 1714 1772 2.95 3.12 3.50 1778 1801 1853 3.39 3.57 3.95
5317 5697 6077 2800 3000 3200 1388 1481 1573 1.53 1.85 2.20 1434 1525 1615 1.74 2.07 2.45 1475 1563 1653 1.93 2.28 2.67 1518 1603 1689 2.14 2.49 2.90 1562 1643 1727 2.37 2.73 3.14 1604 1684 1765 2.60 2.98 3.40 1684 1760 1839 3.04 3.46 3.92 1761 1834 1909 3.48 3.93 4.42 1837 1905 1977 3.93 4.40 4.93 1912 1976 2044 4.39 4.89 5.43
6457 3400 1669 2.63 1706 2.87 1743 3.12 1777 3.35 1811 3.60 1847 3.86 1918 4.41 1986 4.96 2051 5.50 2115 6.03
VOL. OUTLET VEL. 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
CFM FPM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3988 2100 1834 3.54 1930 4.03 2023 4.54
4178 2200 1850 3.69 1942 4.18 2033 4.69 2122 5.23
4368 2300 1868 3.86 1957 4.35 2044 4.86 2131 5.40 2216 5.97
4558 2400 1888 4.04 1974 4.53 2059 5.04 2143 5.58 2226 6.15 2307 6.74
4937 2600 1934 4.43 2014 4.93 2094 5.45 2172 6.00 2251 6.57 2328 7.15 2405 7.77 2480 8.40
5317 2800 1987 4.88 2062 5.39 2136 5.92 2211 6.47 2284 7.04 2357 7.64 2430 8.25 2502 8.89 2573 9.54 2643 10.22
5697 3000 2046 5.38 2116 5.90 2186 6.44 2256 7.00 2325 7.58 2394 8.19 2463 8.81 2531 9.44 2599 10.10 2666 10.78
6077 3200 2110 5.95 2176 6.48 2241 7.03 2307 7.60 2372 8.19 2438 8.80 2503 9.42 2567 10.07 2631 10.73
6457 3400 2177 6.57 2240 7.12 2302 7.68 2364 8.26 2425 8.86 2487 9.48 2548 10.11 2610 10.77
6836 3600 2248 7.24 2307 7.81 2366 8.39 2425 8.99 2483 9.60 2542 10.23 2600 10.87 2658 11.53
7216 3800 2321 7.98 2378 8.57 2434 9.17 2490 9.79 2545 10.41 2601 11.05 2656 11.70
7596 4000 2396 8.76 2451 9.39 2504 10.02 2558 10.65 2611 11.29 2664 11.94
7976 4200 2473 9.60 2526 10.26 2577 10.92 2628 11.58
8356 4400 2551 10.49 2602 11.19 2652 11.88
8735 4600 2630 11.44

Performance certified is for installation type B – free inlet, ducted outlet.

Power Rating (BHP) does not includetransmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and most efficient performance.

Class I Backward Inclined Blowers

Class II Backward Inclined Blowers

TIP SPEED (FPM) = 5.236 x RPM OUTLET 2.318 Sq. Ft. Inside MAX. HP = 1.0139 RPM 3

{ (1000 )

211/2" x 157/8" Outside

B-200

WHEEL DIAMETER —20" INLET 2.435 Sq. Ft. Inside MAX. RPM{ 211/2" Dia. Outside CL.1 1866

CL.2 2432

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1854 2086 2318 800 900 1000 492 524 558 0.12 0.15 0.18 610 632 658 0.22 0.26 0.29 716 731 751 0.34 0.38 0.42 — — 838 — — 0.56 — — 920 — — 0.70 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
2550 2782 3013 1100 1200 1300 594 632 670 0.21 0.25 0.30 686 717 750 0.33 0.38 0.43 774 799 827 0.47 0.53 0.58 856 877 901 0.62 0.68 0.75 934 951 971 0.77 0.84 0.91 1022 1039 1.00 1.09 — — — — — — — — — — — — — — — — — — — — — — — —
3245 3477 3709 1400 1500 1600 710 750 791 0.35 0.41 0.47 784 820 857 0.49 0.56 0.63 857 888 921 0.65 0.72 0.80 926 954 984 0.82 0.90 0.99 994 1019 1045 1.00 1.08 1.18 1059 1081 1105 1.18 1.28 1.38 1182 1200 1219 1.56 1.67 1.79 1312 1328 2.09 2.23 1431 — — 2.68 — — — — — —
3941 4172 4404 1700 1800 1900 833 875 917 0.55 0.63 0.73 895 933 972 0.71 0.80 0.90 955 991 1027 0.89 0.99 1.09 1015 1048 1081 1.08 1.18 1.29 1074 1104 1135 1.28 1.39 1.51 1131 1158 1187 1.49 1.61 1.73 1241 1264 1289 1.92 2.06 2.20 1346 1365 1387 2.37 2.53 2.68 1446 1463 1481 2.84 3.01 3.19 1542 1556 1572 3.33 3.51 3.71
4636 4868 5100 2000 2100 2200 960 1003 1046 0.83 0.94 1.06 1012 1053 1093 1.01 1.13 1.26 1064 1102 1141 1.20 1.33 1.47 1116 1152 1188 1.42 1.55 1.69 1167 1201 1235 1.64 1.77 1.92 1218 1249 1282 1.87 2.01 2.17 1316 1344 1373 2.35 2.51 2.68 1410 1435 1461 2.85 3.03 3.21 1502 1524 1547 3.37 3.57 3.77 1590 1609 1631 3.91 4.12 4.34
5331 5563 6027 2300 2400 2600 1089 1132 1220 1.20 1.34 1.67 1134 1176 1260 1.40 1.55 1.89 1180 1220 1301 1.61 1.77 2.12 1225 1263 1341 1.84 2.00 2.37 1271 1307 1381 2.08 2.25 2.63 1315 1350 1421 2.33 2.51 2.90 1403 1434 1500 2.86 3.05 3.46 1489 1517 1578 3.41 3.61 4.06 1572 1598 1654 3.98 4.20 4.68 1653 1677 1728 4.57 4.80 5.31
6490 6954 7418 2800 3000 3200 1308 1396 1485 2.05 2.49 2.98 1345 1431 1517 2.28 2.73 3.24 1382 1466 1550 2.53 2.99 3.51 1420 1501 1583 2.79 3.26 3.80 1457 1536 1616 3.06 3.55 4.09 1495 1571 1648 3.34 3.84 4.40 1568 1640 1714 3.93 4.46 5.04 1641 1709 1778 4.55 5.10 5.71 1713 1776 1842 5.20 5.78 6.42 1784 1843 1906 5.87 6.48 7.14
7881 3400 1573 3.54 1604 3.82 1635 4.10 1666 4.40 1697 4.71 1727 5.02 1789 5.69 1850 6.39 1911 7.12 1971 7.87
VOL. OUTLET VEL. 4 S.P. 4.5 S.P. 5 S.P. 5.5 S.P. 6 S.P. 6.5 S.P. 7 S.P. 7.5 S.P. 8 S.P. 8.5 S.P.
CFM FPM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4868 2100 1693 4.69 1774 5.27 1852 5.86
5100 2200 1712 4.92 1791 5.52 1867 6.13 1942 6.75 2016 7.39
5331 2300 1732 5.17 1809 5.78 1884 6.41 1957 7.05 2029 7.70
5563 2400 1754 5.42 1829 6.06 1902 6.70 1974 7.36 2044 8.03 2113 8.71 2180 9.40
6027 2600 1801 5.97 1873 6.63 1943 7.31 2011 8.01 2078 8.71 2144 9.42 2209 10.15 2273 10.88 2335 11.62
6490 2800 1853 6.55 1921 7.25 1988 7.97 2053 8.69 2118 9.43 2181 10.18 2243 10.94 2304 11.71 2365 12.48 2424 13.27
6954 3000 1909 7.19 1973 7.92 2037 8.67 2100 9.43 2162 10.20 2222 10.99 2282 11.78 2341 12.58 2399 13.39
7418 3200 1968 7.89 2030 8.65 2091 9.43 2151 10.22 2210 11.03 2268 11.85 2326 12.67 2382 13.51
7881 3400 2030 8.64 2089 9.43 2147 10.24 2205 11.07 2261 11.91 2318 12.76 2373 13.62 2427 14.49
8345 3600 2095 9.46 2152 10.28 2207 11.12 2262 11.98 2317 12.85 2370 13.73 2424 14.62
8808 3800 2163 10.35 2216 11.20 2270 12.07 2322 12.95 2375 13.85 2426 14.76
9272 4000 2232 11.32 2284 12.20 2335 13.09 2385 14.00
9736 4200 2304 12.37 2353 13.27 2402 14.19
10199 4400 2377 13.50 2424 14.43

Performance certified is for installation type B –free inlet, ducted outlet.

Power Rating (BHP) does not include transmission losses.

Performance ratings do not include the effects of appurtenances (accessories).

Data in bold face indicates quietest and mostefficient performance.

Class I Backward Inclined Blowers

Class II Backward Inclined Blowers

RPM 3 TIP SPEED (FPM) = 5.825 x RPM OUTLET 2.827 Sq. Ft. Inside MAX. HP = 1.8739

{ (1000 )

24" x 173/8" Outside

B-222

WHEEL DIAMETER —221/4" INLET 3.015 Sq. Ft. Inside MAX. RPM{237/8" Dia. Outside CL.1 1661

CL.2 2166

VOL. CFM OUTLET VEL. FPM .25 S.P. .5 S.P. .75 S.P. 1 S.P. 1.25 S.P. 1.5 S.P. 2 S.P. 2.5 S.P. 3 S.P. 3.5 S.P.
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2262 2544 2827 800 900 1000 428 456 486 0.15 0.18 0.21 536 553 574 0.27 0.30 0.35 645 659 0.45 0.50 — — 741 — — 0.67 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
3110 3392 3675 1100 1200 1300 517 550 584 0.25 0.30 0.36 598 624 653 0.39 0.45 0.51 677 697 720 0.56 0.62 0.69 753 768 787 0.73 0.80 0.88 827 838 852 0.93 1.00 1.09 905 916 1.22 1.30 — — — — — — — — — — — — — — — — — — — — — — — —
3958 4241 4523 1400 1500 1600 619 655 691 0.42 0.49 0.57 683 714 746 0.59 0.67 0.76 746 773 802 0.77 0.86 0.95 808 831 857 0.97 1.06 1.16 870 889 911 1.18 1.28 1.39 930 946 965 1.40 1.51 1.63 1046 1058 1071 1.89 2.01 2.14 — — 1173 — — 2.69 — — — — — — — — — — — —