Roof Downblast - ExhaustBelt Drive
GB-141HP • G-143HP
283⁄8
(721)
22
(559)
*233⁄4
(603)
4(102)
13⁄4 (44)
Static Pressure (Pa)
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| RPM (Belt) |
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| RPM (Direct) |
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| RPM |
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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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wg) |
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(in. |
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Pressure |
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| S | 2200 | |
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| H |
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| F |
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| T | O |
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Static |
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| H | E | L |
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| T | T |
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| N |
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| D |
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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 = 75/83 lbs. (34/38 kg)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
Volume (cfm)
Volume (m3/hr )
Direct Drive RPM
Motor HP
Belt Direct
141HP
143HP
Fan
RPM
Static Pressure in Inches wg
..5 | ..75 | 1 | 1..25 | 1..5 | 1..75 | 2 | 2..25 | 2..5 | 2..75 |
1/4
1/3
1/2
3/4
VG-
3/4
motor.DC
VG
| 1020 | CFM | 488 |
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| BHP | 0..08 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/2351)3 |
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| Sones | 6..3 |
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| MAXIMUM RPM - |
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| CFM | 645 | 413 |
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| TIP SPEED (ft/min) = RPM x 3.829 |
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1140 | BHP | 0..11 | 0..11 |
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| MAXIMUM MOTOR FRAME SIZE = 145T |
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| Sones | 7..7 | 7..6 |
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| CFM | 837 | 700 | 486 |
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| 1320 | BHP | 0..17 | 0..18 | 0..17 |
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| Sones | 10..3 | 9..8 | 9..9 |
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| CFM | 1009 | 903 | 774 | 592 |
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| 1500 | BHP | 0..24 | 0..26 | 0..26 | 0..25 |
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| Sones | 13..1 | 12..3 | 12..2 | 12..4 |
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| CFM | 1151 | 1064 | 959 | 833 | 668 |
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| 1655 | BHP | 0..32 | 0..34 | 0..35 | 0..35 | 0..34 |
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| Sones | 15..0 | 14..1 | 13..3 | 13..1 | 13..6 |
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| CFM | 1213 | 1132 | 1035 | 932 | 784 | 588 |
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1725 | BHP | 0..36 | 0..38 | 0..39 | 0..39 | 0..39 | 0..37 |
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| Sones | 16..2 | 15..4 | 14..7 | 14..2 | 14..3 | 14..9 |
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| CFM | 1289 | 1213 | 1127 | 1030 | 911 | 763 | 545 |
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| 1812 | BHP | 0..41 | 0..43 | 0..45 | 0..46 | 0..45 | 0..45 | 0..41 |
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| Sones | 17..8 | 17..2 | 16..6 | 15..8 | 15..6 | 15..9 | 16..6 |
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| CFM | 1366 | 1294 | 1218 | 1127 | 1033 | 901 | 753 |
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| 1900 | BHP | 0..47 | 0..49 | 0..51 | 0..53 | 0..53 | 0..52 | 0..51 |
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| Sones | 19..0 | 18..4 | 18..0 | 17..4 | 16..8 | 16..7 | 17..0 |
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| CFM | 1495 | 1430 | 1361 | 1285 | 1200 | 1113 | 991 | 857 | 672 |
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| 2050 | BHP | 0..58 | 0..61 | 0..63 | 0..65 | 0..66 | 0..66 | 0..66 | 0..65 | 0..61 |
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| Sones | 21..0 | 20..0 | 19..8 | 19..3 | 18..8 | 18..6 | 18..3 | 18..3 | 18..6 |
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| CFM | 1598 | 1536 | 1472 | 1407 | 1328 | 1248 | 1163 | 1045 | 919 |
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| 2170 | BHP | 0..68 | 0..71 | 0..73 | 0..76 | 0..77 | 0..78 | 0..79 | 0..78 | 0..77 |
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| Sones | 22..0 | 22..0 | 21..0 | 21..0 | 21..0 | 21..0 | 21..0 | 20..0 | 19..7 |
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2200
CFM | 1623 | 1562 | 1500 | 1436 | 1360 | 1281 | 1200 | 1088 | 968 | 834 |
BHP | 0..71 | 0..74 | 0..76 | 0..78 | 0..80 | 0..82 | 0..82 | 0..81 | 0..80 | 0..79 |
| 23..0 | 22..0 | 22..0 | 22..0 | 21..0 | 21..0 | 21..0 | 21..0 | 20..0 | 20..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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