Roof Downblast Exhaust
Belt & Direct Drive
GB-101HP • G-103HP
243⁄8
(619)
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| *23 | 3⁄4 | |||||
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| 43⁄8 (111) |
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| 13⁄4 (44) | |||||||
19
(483)
Damper Size = 12 x 12 (305 x 305) Roof Opening = 141/2 x 141/2 (368 x 368) 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 = 58/63 lbs. (26/29 kg)
All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open
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| E | Density 0.075 lb/ft3 | |
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| Density 1.2 kg/m | 3 | |
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Pressure |
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Volume (cfm)
| 3 |
Direct Drive RPM |
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Motor HP
Belt Direct
101HP | 103HP |
Fan
RPM
Static Pressure in Inches wg
0 | 0..25 | 0..5 | 0..75 | 1 | 1..25 | 1..5 | 1..75 | 2 | 2..25 |
1/4
1/3
VG-
1/2
VG
1300 | CFM | 571 | 477 | 342 |
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BHP | 0..06 | 0..06 | 0..07 |
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| MAXIMUM BHP AT A GIVEN RPM = (RPM/3165)3 |
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| Sones | 6..6 | 5..7 | 5..3 |
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| MAXIMUM RPM = 2550 |
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| CFM | 635 | 553 | 449 | 243 |
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| TIP SPEED (ft/min) = RPM x 2.978 |
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1445 | BHP | 0..08 | 0..09 | 0..09 | 0..08 |
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| MAXIMUM MOTOR FRAME SIZE = 56 |
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| Sones | 8..4 | 7..5 | 7 | 6..3 |
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| CFM | 699 | 626 | 537 | 417 |
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1590 | BHP | 0..10 | 0..11 | 0..12 | 0..12 |
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| Sones | 10..4 | 9..5 | 9..1 | 8..3 |
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| CFM | 758 | 692 | 613 | 521 | 364 |
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BHP | 0..13 | 0..14 | 0..15 | 0..16 | 0..15 |
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| Sones | 11..4 | 10..7 | 10..6 | 10..1 | 10 |
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| CFM | 826 | 767 | 697 | 618 | 518 |
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1880 | BHP | 0..17 | 0..18 | 0..19 | 0..20 | 0..20 |
| 0..18 |
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| Sones | 12..7 | 12..2 | 11..9 | 12 | 11..4 |
| 11..9 |
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| CFM | 890 | 836 | 772 | 702 | 622 |
| 515 |
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2025 | BHP | 0..21 | 0..23 | 0..24 | 0..24 | 0..26 |
| 0..25 |
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| Sones | 14..2 | 13..6 | 13..3 | 13..2 | 12..6 |
| 12 |
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| CFM | 939 | 889 | 830 | 765 | 693 |
| 607 |
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2137 | BHP | 0..25 | 0..26 | 0..28 | 0..28 | 0..29 |
| 0..30 |
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| Sones | 15..4 | 14..8 | 14..4 | 14..2 | 13..4 |
| 13..1 |
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| CFM | 979 | 931 | 875 | 814 | 748 |
| 674 |
| 574 | 406 |
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2229 | BHP | 0..28 | 0..30 | 0..31 | 0..32 | 0..33 |
| 0..35 |
| 0..33 | 0..31 |
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| Sones | 15..8 | 15..4 | 14..8 | 14..5 | 14..1 |
| 13..7 |
| 13..2 | 12..0 |
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1/2
| CFM | 1026 | 981 | 928 | 871 | 809 | 742 | 661 | 543 | 358 |
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2336 | BHP | 0..33 | 0..34 | 0..36 | 0..36 | 0..37 | 0..39 | 0..40 | 0..37 | 0..34 |
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| Sones | 16..4 | 16 | 15..4 | 14..9 | 14..7 | 14 | 14..1 | 13..5 | 13..6 |
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| CFM | 1098 | 1056 | 1008 | 956 | 901 | 840 | 775 | 695 | 583 | 416 |
2500 | BHP | 0..40 | 0..42 | 0..43 | 0..45 | 0..45 | 0..46 | 0..48 | 0..48 | 0..46 | 0..42 |
| Sones | 17..8 | 17..4 | 16..9 | 16..7 | 15..8 | 15..5 | 14..8 | 15..2 | 15..7 | 16..6 |
| CFM | 1120 | 1078 | 1032 | 982 | 928 | 869 | 807 | 735 | 639 | 497 |
2550 | BHP | 0..43 | 0..44 | 0..46 | 0..47 | 0..47 | 0..49 | 0..51 | 0..52 | 0..50 | 0..47 |
| Sones | 18..2 | 17..9 | 17..4 | 17..2 | 16..3 | 16..1 | 15..1 | 15..6 | 16..2 | 17..2 |
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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