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Static Pressure (in. wg)
Static Pressure (Pa)
Volume (cfm)
3
Volume (m
/hr )
RPM (Belt)
RPM (Direct)
RPM (Vari-Green)
HP
Density 0.075 lb/ft
3
Density 1.2 kg/m
3
22
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical 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.
Motor HP
Fan
RPM
Static Pressure in Inches wg
Belt Direct 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25
101HP
103HP
1/4
VG -Vari-Green is a direct drive brushless DC motor.
1300
CFM
571 477 342
BHP
0.06 0.06 0.07
Sones
6.6 5.7 5.3
1445
CFM
635 553 449 243
BHP
0.08 0.09 0.09 0.08
Sones
8.4 7.5 7 6.3
1590
CFM
699 626 537 417
BHP
0.10 0.11 0.12 0.12
Sones
10.4 9.5 9.1 8.3
A-1/4 1725
CFM
758 692 613 521 364
BHP
0.13 0.14 0.15 0.16 0.15
Sones
11.4 10.7 10.6 10.1 10
1880
CFM
826 767 697 618 518 337
BHP
0.17 0.18 0.19 0.20 0.20 0.18
Sones
12.7 12.2 11.9 12 11.4 11.9
2025
CFM
890 836 772 702 622 515 313
BHP
0.21 0.23 0.24 0.24 0.26 0.25 0.22
Sones
14.2 13.6 13.3 13.2 12.6 12 11.4
1/3
2137
CFM
939 889 830 765 693 607 474
BHP
0.25 0.26 0.28 0.28 0.29 0.30 0.28
Sones
15.4 14.8 14.4 14.2 13.4 13.1 12.1
2229
CFM
979 931 875 814 748 674 574 406
BHP
0.28 0.30 0.31 0.32 0.33 0.35 0.33 0.31
Sones
15.8 15.4 14.8 14.5 14.1 13.7 13.2 12.0
1/2
2336
CFM
1026 981 928 871 809 742 661 543 358
BHP
0.33 0.34 0.36 0.36 0.37 0.39 0.40 0.37 0.34
Sones
16.4 16 15.4 14.9 14.7 14 14.1 13.5 13.6
2500
CFM
1098 1056 1008 956 901 840 775 695 583 416
BHP
0.40 0.42 0.43 0.45 0.45 0.46 0.48 0.48 0.46 0.42
Sones
17.8 17.4 16.9 16.7 15.8 15.5 14.8 15.2 15.7 16.6
2550
CFM
1120 1078 1032 982 928 869 807 735 639 497
BHP
0.43 0.44 0.46 0.47 0.47 0.49 0.51 0.52 0.50 0.47
Sones
18.2 17.9 17.4 17.2 16.3 16.1 15.1 15.6 16.2 17.2
Damper Size = 12 x 12
(305 x 305)
Roof Opening = 14 x 14 (368 x 368)
Shroud Thickness = 0.051 (1.3)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight G/GB = 58/63 lbs. (26/29 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
1
3
⁄4 (44)
24
3
⁄8
(619)
4
3
⁄8 (111)
*23
3
⁄4
(603)
19
(483)
MAXIMUM BHP AT A GIVEN RPM = (RPM/3165)
3
MAXIMUM RPM = 2550
TIP SPEED (ft/min) = RPM x 2.978
MAXIMUM MOTOR FRAME SIZE = 56
Roof Downblast Exhaust
Belt & Direct Drive
GB-101HP • G-103HP
A-1725 RPM VG-2550-RPM
VG-
1/2
Direct Drive RPM