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Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings do not include the effects
of appurtenances (accessories). The sound ratings shown are loudness values in fan sones at 5 ft (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: Free inlet hemispherical sone levels. The AMCA Certified Ratings Seal applies to sone ratings only.
15
21
(533)
35
3
⁄8
(899)
28
5
⁄8*
(727)
30
(762)
1
3
⁄4
(44)
USGF-180 - Belt Drive
Model
Number
Motor
hp
Fan
rpm
CFM / Static Pressure in inches wg
0 0.125 0.25 0.5 0.75 1 1.25 1.5 1.75 2
USGF-180-4 1/4
630
CFM 2380 2154 1861
BHP 0.13 0.15 0.16
Sones 7.1 6.4 5.5
745
CFM 2815 2617 2448 1763
BHP 0.22 0.24 0.26 0.25
Sones 9.2 8.6 8.1 7.1
USGF-180-3 1/3
820
CFM 3098 2916 2759 2257
BHP 0.30 0.32 0.34 0.34
Sones 11.2 10.4 10.0 9.0
USGF-180-5 1/2
940
CFM 3551 3389 3243 2879 2363
BHP 0.45 0.47 0.49 0.52 0.50
Sones 13.8 13.5 13.1 12.4 11.2
USGF-180-7 3/4
1010
CFM 3816 3664 3526 3242 2799 2105
BHP 0.56 0.58 0.61 0.65 0.64 0.58
Sones 15.4 15.2 14.9 14.7 13.7 11.8
1075
CFM 4061 3919 3786 3554 3141 2652
BHP 0.67 0.70 0.73 0.78 0.78 0.75
Sones 16.5 16.2 15.8 151.5 14.7 13.3
USGF-180-10 1
1185
CFM 4477 4348 4224 4005 3703 3336 2841
BHP 0.90 0.93 0.96 1.01 1.04 1.04 0.99
Sones 18.5 17.9 17.1 16.5 16.0 15.2 14.4
USGF-180-15 1½
1275
CFM 4817 4697 4578 4369 4163 3799 3437 2930
BHP 1.12 1.15 1.19 1.24 1.30 1.30 1.28 1.22
Sones 21 20 19.5 18.7 18.2 17.5 16.7 15.9
1360
CFM 5138 5026 4913 4710 4532 4232 3912 3537 3023
BHP 1.36 1.39 1.43 1.49 1.56 1.58 1.58 1.54 1.46
Sones 23 23 22 21 21 20 19.2 18.3 17.3
USGF-180-20 2
1430
CFM 5402 5296 5189 4993 4819 4593 4270 3968 3567 3001
BHP 1.58 1.62 1.66 1.72 1.79 1.83 1.83 1.83 1.76 1.66
Sones 25 25 25 24 23 22 22 21 19.5 18.2
1495
CFM 5648 5546 5443 5254 5082 4921 4598 4313 3983 3564
BHP 1.80 1.84 1.89 1.96 2.02 2.10 2.10 2.10 2.06 1.99
Sones 28 27 27 26 25 25 24 23 22 21
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H-
W.G.
MAXIMUM BHP AT A GIVEN RPM = (RPM/1167)
3
MAXIMUM RPM = 1495
TIP SPEED (ft/min.) = RPM x 4.843
MAXIMUM MOTOR FRAME SIZE = 184T
AVERAGE DISCHARGE VELOCITY (FPM) = CFM/2.92
Roof Opening = 20½ x 20½ (521 x 521)
Windband Thickness = 0.051 (1.3)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight = 190 lb. (86 kg)
All dimensions in inches (millimeters).
*May be greater depending on motor.
^Weight shown is largest cataloged Open Drip Proof motor.