Greenheck Fan manual GB-161 G-163, Maximum BHP AT a Given RPM = RPM/1355

Roof Downblast - Exhaust

Belt & Direct Drive

GB-161 • G-163

283⁄8

(619)

22

(559)

*233⁄4

(603)

4(102)

13⁄4 (44)

Static Pressure (Pa)

RPM (Belt)

RPM (Direct)

HP

Density 0.075 lb/ft3

Density 1.2 kg/m3

wg)

E

(in.

U

R

V

C

M

Pressure

T

E

S

Y

S

I S

T

H

Static

F

O

F

T

E

L

E

H

T

O

T

T

C

E

L

E

S

T

O

N

O

D

Damper Size = 16 x 16

Roof Opening = 181/2 x 181/2 (470 x 470) 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 = 101/88 lbs. (46/40 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

Motor HP		Fan					Static Pressure in Inches wg
Belt	Direct	RPM		0	0..125	0..25	0..375	0..5	0..75		0..875	1	1..25	1..5
161	163
		580	CFM	1713	1417	970
			BHP	0..07	0..08	0..07			MAXIMUM BHP AT A GIVEN RPM = (RPM/1355)3
			Sones	5..8	5..6	5..3				MAXIMUM RPM - GB-161=1575, G-163=1725
1/4			CFM	2127	1893	1632	1243			TIP SPEED (ft/min) = RPM x 4.352
		720	BHP	0..14	0..15	0..15	0..14			MAXIMUM MOTOR FRAME SIZE = 145T
			Sones	7..8	7..5	7..2	6..8
			CFM	2540	2344	2145	1913	1596
	C-1/4	860	BHP	0..23	0..24	0..25	0..26	0..24
			Sones	10..5	10..0	9..6	9..3	8..7
			CFM	2791	2612	2434	2236	2010
1/3		945	BHP	0..31	0..32	0..33	0..34	0..34
			Sones	12..6	12..0	11..5	11..2	10..7
			CFM	3102	2940	2782	2616	2429		1937	1582
		1050	BHP	0..42	0..44	0..45	0..46	0..47		0..44	0..41
1/2			Sones	14..4	13..8	13..2	12..9	12..6		11..6	10..7
			CFM	3249	3095	2943	2787	2615		2198	1900
		1100	BHP	0..48	0..50	0..52	0..53	0..53		0..52	0..50
			Sones	15..3	14..7	14..1	13..8	13..5		12..5	12..0
			CFM	3367	3219	3072	2922	2761		2382	2125	1808
	B-1/2	1140	BHP	0..54	0..56	0..57	0..58	0..59		0..59	0..57	0..54
3/4			Sones	15..9	15..4	14..9	14..5	14..2		13..3	12..9	12..1
			CFM	3692	3557	3422	3289	3149		2838	2658	2444
		1250	BHP	0..71	0..73	0..75	0..76	0..77		0..79	0..78	0..76
			Sones	17..9	17..4	17..0	16..6	16..3		15..6	15..2	14..9
			CFM	4062	3938	3815	3694	3571		3304	3161	3007	2609	2073
1		1375	BHP	0..95	0..97	0..99	1..01	1..02		1..04	1..05	1..04	1..01	0..93
			Sones	21..0	20..0	19..6	19..2	18..9		18..4	18..0	17..6	17..2	15..4
			CFM	4652	4545	4437	4330	4225		4007	3894	3769	3512	3198
1-1/2		1575	BHP	1..42	1..45	1..47	1..49	1..51		1..54	1..56	1..56	1..57	1..54
			Sones	26..0	25..0	25..0	24..0	24..0		24..0	23..0	23..0	22..0	22..0

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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