Greenheck Fan manual GB-240HP, Maximum BHP AT a Given RPM = RPM/845

Roof Downblast - Exhaust Belt Drive

GB-240HP

423⁄4

(1086)

*311⁄2	(Pa)
(800)
	Pressure
53⁄4 (146)	Static
13⁄4 (44)

34

(864)

Damper Size = 24 x 24 (610 x 610) Roof Opening = 261/2 x 261/2 (673 x 673) Shroud Thickness = 0.064 (1.6) Motor Cover Thickness = 0.040 (1.0) Curb Cap Thickness = 0.064 (1.6) ^Approximate Unit Weight = 187 lbs. (85 kg)

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

RPM (Belt)

HP

Density

0.075 lb/ft3

Density 1.2 kg/m3

wg)

E

V

R

U

(in.

M

C

E

Pressure

T

S

Y

S

S

T

H

I

F

Static

O

F

T

E

L

E

H

T

O

T

T

C

E

L

E

S

T

O

N

O

D

Volume (cfm x 1000)

Volume (m3/hr x 1000)

Motor	Fan					Static Pressure in Inches wg
HP	RPM		0..5	0..625	0..75	1	1..25	1..5	1..75		2	2..25	2..5
240HP
		CFM	3035	2586
	635	BHP	0..42	0..41				MAXIMUM BHP AT A GIVEN RPM = (RPM/845)3
		Sones	8..0	7..6
1/2										MAXIMUM RPM = 1240
		CFM	3475	3147	2693
									TIP SPEED (ft/min) = RPM x 6.414
	685	BHP	0..53	0..53	0..51			MAXIMUM MOTOR FRAME SIZE = 184T
		Sones	9..4	8..8	8..4
		CFM	3877	3603	3272
	733	BHP	0..64	0..65	0..65
3/4		Sones	11..0	10..3	9..7
		CFM	4247	4005	3740	2964
	780	BHP	0..76	0..77	0..78	0..75
		Sones	12..7	11..9	11..3	10..3
		CFM	4860	4654	4434	3915	3105
1	860	BHP	0..99	1..02	1..04	1..05	0..99
		Sones	15..9	15..2	14..3	13..2	12..2
		CFM	5310	5118	4925	4496	3944
	920	BHP	1..20	1..23	1..25	1..29	1..27
11⁄2		Sones	18..5	17..4	16..6	15..0	13..8
		CFM	5751	5574	5392	5010	4562	3958
	980	BHP	1..43	1..47	1..49	1..54	1..55	1..52
		Sones	22	19..9	19..1	17..2	15..6	14..8
		CFM	6114	5948	5776	5428	5039	4560		3896
	1030	BHP	1..65	1..69	1..72	1..77	1..80	1..80		1..73
2		Sones	24	23	21	19..6	17..6	16..3		15..7
		CFM	6474	6315	6154	5826	5468	5062		4555	3763
	1080	BHP	1..89	1..92	1..96	2..02	2..06	2..08		2..05	1..93
		Sones	27	26	24	23	20	18..2		17..3	16..7
		CFM	6853	6702	6550	6237	5914	5560		5133	4588
	1133	BHP	2..16	2..20	2..24	2..31	2..36	2..40		2..39	2..35
3		Sones	29	27	26	24	22	21		19..3	18..7
		CFM	7610	7471	7333	7053	6767	6469		6146	5775	5364	4776
	1240	BHP	2..80	2..84	2..89	2..97	3..04	3..10		3..14	3..14	3..13	3..04
		Sones	31	30	29	28	27	25		24	23	23	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.

36