Roof Downblast - Exhaust Belt Drive
GB-300
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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| Density | 0.075 lb/ft3 |
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| Density 1.2 kg/m3 | |
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wg) |
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(in. |
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Pressure |
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| T | O |
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Static |
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| L | E | F |
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| T | T | O |
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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 | 0..125 | 0..25 | 0..5 | 0..75 | 1 | 1..25 | 1..5 | 1..75 |
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300 |
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| CFM | 4859 | 3976 |
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| 300 | BHP | 0..18 | 0..19 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/517)3 |
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| Sones | 9..3 | 5..3 |
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1/3 |
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| MAXIMUM RPM = 890 |
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| CFM | 5912 | 5222 | 4340 |
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| TIP SPEED (ft/min) = RPM x 7.985 |
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| 365 | BHP | 0..33 | 0..35 | 0..35 |
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| MAXIMUM MOTOR FRAME SIZE = 184T |
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| Sones | 9..2 | 6..2 | 5..7 |
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| CFM | 6803 | 6222 | 5537 |
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1/2 | 420 | BHP | 0..50 | 0..52 | 0..53 |
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| Sones | 9..6 | 8..0 | 7..0 |
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| CFM | 7694 | 7197 | 6616 | 5095 |
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3/4 | 475 | BHP | 0..72 | 0..75 | 0..77 | 0..74 |
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| Sones | 11..4 | 10..6 | 9..6 | 8..1 |
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| CFM | 8585 | 8150 | 7640 | 6456 | 4195 |
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1 | 530 | BHP | 1..00 | 1..04 | 1..06 | 1..07 | 0..91 |
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| Sones | 13..4 | 12..9 | 12..2 | 10..7 | 9..4 |
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| CFM | 9719 | 9334 | 8907 | 7952 | 6721 |
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11⁄2 | 600 | BHP | 1..45 | 1..49 | 1..53 | 1..55 | 1..52 |
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| Sones | 15..9 | 15..4 | 14..9 | 13..8 | 12..2 |
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| CFM | 10772 | 10425 | 10060 | 9228 | 8269 | 7025 |
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2 | 665 | BHP | 1..97 | 2..02 | 2..06 | 2..11 | 2..11 | 2..03 |
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| Sones | 18..8 | 18..2 | 17..7 | 16..8 | 15..7 | 13..7 |
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| CFM | 11549 | 11226 | 10901 | 10129 | 9297 | 8283 |
| 6691 |
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| 713 | BHP | 2..43 | 2..48 | 2..53 | 2..59 | 2..61 | 2..57 |
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3 |
| Sones | 21 | 20 | 19..6 | 18..9 | 18..0 | 16..4 |
| 13..7 |
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| CFM | 12311 | 12007 | 11704 | 10997 | 10242 | 9369 |
| 8293 | 6437 |
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| 760 | BHP | 2..94 | 3..00 | 3..05 | 3..13 | 3..16 | 3..15 |
| 3..06 | 2..76 |
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| Sones | 23 | 22 | 21 | 21 | 19..8 | 18..6 |
| 16..8 | 14..0 |
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| CFM | 13363 | 13084 | 12804 | 12175 | 11501 | 10770 |
| 9909 | 8885 | 7128 |
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| 825 | BHP | 3..76 | 3..82 | 3..88 | 3..97 | 4..02 | 4..05 |
| 4..01 | 3..90 | 3..56 |
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5 |
| Sones | 25 | 25 | 24 | 24 | 23 | 22 |
| 20 | 18..7 | 16..1 |
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| CFM | 14416 | 14157 | 13898 | 13335 | 12716 | 12073 |
| 11379 | 10536 | 9568 |
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| 890 | BHP | 4..73 | 4..79 | 4..85 | 4..96 | 5..03 | 5..06 |
| 5..09 | 5..02 | 4..89 |
| 4..54 |
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| Sones | 28 | 28 | 28 | 27 | 26 | 25 |
| 24 | 22 | 21 |
| 18..7 |
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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.
38