Roof Downblast - Exhaust Belt Drive
GB-300HP
50
(1270)
*36 |
|
(914) | Pressure(Pa) |
81⁄4 (210) | |
13⁄4 (44) | Static |
|
40
(1016)
Damper Size = 30 x 30 (762 x 762) Roof Opening = 321/2 x 321/2 (826 x 826) Shroud Thickness = 0.064 (1.6) Motor Cover Thickness = 0.051 (1.3) Curb Cap Thickness = 0.064 (1.6) ^Approximate Unit Weight = 320 lbs. (145 kg)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
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| RPM (Belt) |
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| HP |
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| Density 0.075 lb/ft3 |
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| Density 1.2 kg/m3 |
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| V |
wg) |
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| M | C | |
(in. |
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Pressure |
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| S | Y |
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| T | H | I |
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Volume (cfm x 1000)
Volume (m3/hr x 1000)
Motor | Fan |
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| Static Pressure in Inches wg |
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HP | RPM |
| 0..5 | 0..75 | 1 | 1..25 | 1..5 | 1..75 | 2 | 2..25 | 2..5 |
| 2..75 |
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300HP |
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| CFM | 2912 |
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| 460 | BHP | 0..41 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/613)3 |
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| Sones | 9..7 |
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1/2 |
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| MAXIMUM RPM = 1065 |
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| CFM | 3602 |
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| TIP SPEED (ft/min) = RPM x 7.985 |
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| 495 | BHP | 0..53 |
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| MAXIMUM MOTOR FRAME SIZE = 184T |
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| Sones | 10..3 |
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| CFM | 4662 | 3600 |
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3/4 | 565 | BHP | 0..77 | 0..76 |
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| Sones | 11..8 | 10..4 |
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| CFM | 5398 | 4652 | 3309 |
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1 | 620 | BHP | 1..01 | 1..04 | 0..94 |
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| Sones | 13..4 | 12..3 | 10..6 |
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| CFM | 6542 | 5954 | 5269 | 4221 |
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11⁄2 | 710 | BHP | 1..48 | 1..53 | 1..55 | 1..47 |
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| Sones | 17..2 | 16..0 | 15..3 | 13..4 |
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| CFM | 7013 | 6462 | 5889 | 5027 |
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| 748 | BHP | 1..71 | 1..78 | 1..81 | 1..78 |
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2 |
| Sones | 18..8 | 17..5 | 17..0 | 15..7 |
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| CFM | 7460 | 6943 | 6402 | 5737 | 4800 |
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| 785 | BHP | 1..96 | 2..04 | 2..08 | 2..10 | 2..00 |
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| Sones | 20 | 19..1 | 18..5 | 17..9 | 16..2 |
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| CFM | 8107 | 7642 | 7146 | 6636 | 5922 | 4992 |
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| 840 | BHP | 2..37 | 2..46 | 2..52 | 2..57 | 2..56 | 2..43 |
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3 |
| Sones | 23 | 22 | 21 | 21 | 19..7 | 18..0 |
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| CFM | 8746 | 8328 | 7870 | 7394 | 6892 | 6150 |
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| 895 | BHP | 2..84 | 2..95 | 3..03 | 3..07 | 3..11 | 3..08 |
| 2..92 |
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| Sones | 25 | 24 | 23 | 23 | 23 | 22 |
| 19..8 |
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| CFM | 9722 | 9356 | 8951 | 8531 | 8094 | 7657 |
| 7029 | 6264 | 5222 |
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| 980 | BHP | 3..68 | 3..81 | 3..90 | 3..99 | 4..03 | 4..08 |
| 4..09 | 3..95 | 3..69 |
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5 |
| Sones | 32 | 31 | 29 | 28 | 27 | 26 |
| 25 | 24 | 23 |
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| CFM | 10688 | 10351 | 10006 | 9621 | 9233 | 8831 |
| 8429 | 7903 | 7255 |
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| 1065 | BHP | 4..67 | 4..81 | 4..94 | 5..04 | 5..12 | 5..17 |
| 5..23 | 5..24 | 5..17 |
| 5..01 |
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| Sones | 44 | 42 | 37 | 37 | 36 | 35 |
| 33 | 31 | 30 |
| 29 |
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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.
39
