Greenheck Fan manual GB-131 G-133, Maximum BHP AT a Given RPM = RPM/20473

Roof Downblast - Exhaust

Belt & Direct Drive

GB-131 • G-133

283⁄8

(721)

19

(483)

*233⁄4

(603)

4(102)

13⁄4 (44)

Static Pressure (Pa)

RPM (Belt)

RPM (Direct)

A

RPM (Vari-Green)

HP

Density 0.075 lb/ft3

Density 1.2 kg/m3

wg)

R

V

E

(in.

U

C

M

Pressure

T

E

S

Y

I S

S

T

H

Static

F

O

T

F

E

E

L

H

T

O

T

T

C

E

L

E

S

T

O

N

DO

Damper Size = 12 x 12 (305 x 305) Roof Opening = 141/2 x 141/2 (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 = 62/67 lbs. (28/30 kg)

All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open Drip-Proof motor.

Volume (cfm)

Volume (m3/hr )

Direct Drive RPM
C-860 RPM	B-1140 RPM	A-1725 RPM	VG-1725 RPM

		Motor HP				Fan
	Belt		Direct			RPM
131			133
					580
			VG-		720
		3/4
				C-1/8	860

	0	0..125
CFM	823	626
BHP	0..02	0..02
Sones	4..5	4..5
CFM	1022	879
BHP	0..04	0..04
Sones	5..4	5..4
CFM	1221	1106
BHP	0..06	0..07
Sones	6..6	6..5

	Static Pressure in Inches wg
0..25	0..375	0..5	0..625		0..75	1	1..25	1..5
			MAXIMUM BHP AT A GIVEN RPM = (RPM/2047)3
			MAXIMUM RPM - GB-131=1725, G-133=1725
650				TIP SPEED (ft/min) = RPM x 3.436
0..04				MAXIMUM MOTOR FRAME SIZE = 56
5..2

962727

0..07 0..07

6..3 6..0

1/4

1/3

1/2

3/4

VG -Vari-Green is a direct drive brushless DC motor.

1000

B-1/6 1140

1250

1315

1440

1600

1685

A-1/2 1725

CFM	1419	1323
BHP	0..10	0..11
Sones	8..1	8..0
CFM	1618	1535
BHP	0..15	0..16
Sones	10..0	9..8
CFM	1774	1698
BHP	0..19	0..2
Sones	12..0	11..7
CFM	1866	1794
BHP	0..22	0..23
Sones	13..2	12..8
CFM	2044	1978
BHP	0..29	0..31
Sones	15..0	15..0
CFM	2271	2212
BHP	0..40	0..42
Sones	16..2	16..0
CFM	2391	2335
BHP	0..47	0..48
Sones	16..9	16..6
CFM	2448	2393
BHP	0..50	0..52
Sones	17..4	17..0

1213	1075	867
0..11	0..12	0..11
7..7	7..4	7..0
1444	1340	1211	1031
0..16	0..17	0..17	0..17
9..6	9..2	8..8	8..5
1617	1528	1426	1133
0..21	0..22	0..23	0..22
11..3	11..0	10..5	9..7
1718	1637	1545	1435	1305
0..24	0..25	0..26	0..26	0..26
12..5	12..1	11..7	11..2	10..9
1911	1838	1759	1674	1571	1299
0..32	0..33	0..34	0..34	0..35	0..34
15..1	15..1	14..5	13..9	13..4	12..5
2152	2088	2023	1873	1783	1686	1425
0..43	0..44	0..45	0..47	0..47	0..48	0..47
15..8	15..6	15..3	14..6	14..2	13..9	13..2
2279	2219	2158	2020	1946	1857	1654	1312
0..50	0..51	0..52	0..54	0..55	0..56	0..56	0..52
16..3	16..0	15..7	15..1	14..8	14..5	13..9	13..5
2338	2281	2220	2159	2089	1935	1746	1474
0..53	0..55	0..56	0..57	0..58	0..59	0..60	0..58
16..7	16..3	15..9	15..6	15..4	14..9	14..3	13..8

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.

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