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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
18
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 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125
071
097
1/6
or
1/8
VG -Vari-Green is a direct drive brushless DC motor.
720
CFM
157 107
BHP
0.01 0.01
Sones
1.8 2.0
790
CFM
172 128 70
BHP
0.01 0.01 0.01
Sones
2.3 2.3 2.2
C-1/8 860
CFM
187 148 101
BHP
0.02 0.02 0.02
Sones
2.8 2.7 2.7
930
CFM
203 166 124
BHP
0.02 0.02 0.02
Sones
3.3 3.4 3.2
1000
CFM
218 184 146 100
BHP
0.03 0.03 0.03 0.02
Sones
3.9 4.0 3.9 3.6
1070
CFM
233 202 167 130
BHP
0.03 0.03 0.03 0.03
Sones
4.6 4.7 4.5 4.2
B-1/6 1140
CFM
248 220 187 152 109
BHP
0.04 0.04 0.04 0.04 0.03
Sones
5.3 5.4 5.1 4.9 4.7
1285
CFM
280 255 228 197 166 127
BHP
0.06 0.06 0.06 0.05 0.05 0.05
Sones
6.8 6.7 6.6 6.3 6.0 5.9
1435
CFM
313 292 265 240 212 185 151
BHP
0.08 0.08 0.08 0.08 0.08 0.07 0.07
Sones
8.0 8.0 7.9 7.6 7.3 7.1 6.9
1580
CFM
344 324 302 281 255 230 205 177 140
BHP
0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.09 0.09
Sones
9.5 9.5 9.4 9.1 8.8 8.5 8.3 8.1 7.9
A-1/4 1725
CFM
376 356 339 316 297 273 250 227 205 171
BHP
0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.12 0.12
Sones
11.3 11.2 11.2 10.8 10.5 10.2 9.9 9.7 9.5 9.3
VG-
1/4
C-860-
RPM B-1140-RPM A-1725-RPM VG-1725-RPM
Roof Downblast Exhaust
Belt & Direct Drive
GB-071 • G-097
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 = 54/60 lbs. (24/27 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
MAXIMUM BHP AT A GIVEN RPM = (RPM/3371)
3
MAXIMUM RPM - GB-071=1710, G-097=1725
TIP SPEED (ft/min) = RPM x 2.929
MAXIMUM MOTOR FRAME SIZE = 56
1
3
⁄4 (44)
24
3
⁄8
(619)
4
3
⁄8 (111)
*23
3
⁄4
(603)
19
(483)
Direct Drive RPM