Specification Sheet

459
Gravity Relief 1:1 Ratio Cont.
Dimensional Data Throat Velocity in FPM @ Static Pressure - Relief
Throat
Area
Throat Size Hood Size
536 758 848 1073 1200
CFM @ Static Pressure - Relief
A x B C D E
.050 .100 .125 .200 .250
7.50 20 x 54 33 67 9 4020 5685 6360 8048 9000
8.33 20 x 60 33 73 9 4467 6317 7067 8942 10000
9.17 20 x 66 34 80 9 4913 6948 7773 9836 11000
10.00 20 x 72 34 86 9 5360 7580 8480 10730 12000
10.83 20 x 78 34 92 9 5807 8212 9187 11624 13000
11.67 20 x 84 35 98 9 6253 8843 9893 12518 14000
4.00 24 x 24 34 34 11 2144 3032 3392 4292 4800
5.00 24 x 30 36 42 11 2680 3790 4240 5365 6000
6.00 24 x 36 37 49 11 3216 4548 5088 6438 7200
7.00 24 x 42 38 56 11 3752 5306 5936 7511 8400
8.00 24 x 48 38 62 11 4288 6064 6784 8584 9600
9.00 24 x 54 39
69 11 4824 6822 7632 9657 10800
10.00 24 x 60 39 75 11 5360 7580 8480 10730 12000
11.00 24 x 66 40 82 11 5896 8338 9328 11803 13200
12.00 24 x 72 40 88 11 6432 9096 10176 12876 14400
13.00 24 x 78 40 94 11 6968 9854 11024 13949 15600
14.00 24 x 84 40 100 11 7504 10612 11872 15022 16800
15.00 24 x 90 40 106 11 8040 11370 12720 16095 18000
6.25 30 x 30 43 43 13 3350 4738 5300 6706 7500
7.50 30 x 36 44 50 13 4020 5685 6360 8048 9000
8.75 30 x 42 45 57 13 4690 6633 7420 9389 10500
10.00 30 x 48 45 65 13 5360 7580 8480 10730 12000
11.25 30 x 54 45 74 13 6030 8528 9540 12071 13500
12.50 30 x 60 48 78 13 6700 9475 10600 13413 15000
13.75 30 x 66 48 84 13 7370 10423
11660 14754 16500
15.00 30 x 72 49 91 13 8040 11370 12720 16095 18000
16.25 30 x 78 49 97 13 8710 12318 13780 17436 19500
17.50 30 x 84 50 104 13 9380 13265 14840 18778 21000
18.75 30 x 90 50 111 13 10050 14213 15900 20119 22500
9.00 36 x 36 52 52 15 4824 6822 7632 9657 10800
10.50 36 x 42 53 59 15 5628 7959 8904 11267 12600
12.00 36 x 48 54 66 15 6432 9096 10176 12876 14400
13.50 36 x 54 55 73 15 7236 10233 11448 14486 16200
15.00 36 x 60 56 80 15 8040 11370 12720 16095 18000
16.50 36 x 66 56 86 15 8844 12507 13992 17705 19800
18.00 36 x 72 57 93 15 9648 13644 15264 19314 21600
19.50 36 x 78 58 99 15 10452 14781 16536 20924 23400
21.00 36 x 84 58 106 15 11256 15918 17808 22533 25200
22.50
36 x 90 58 112 15 12060 17055 19080 24143 27000
24.00 36 x 96 59 119 15 12864 18192 20352 25752 28800
25.50 36 x 102 59 124 15 13668 19329 21624 27362 30600
12.25 42 x 42 59 59 15 6566 9286 10388 13144 14700
15.75 42 x 54 62 74 15 8442 11939 13356 16900 18900
17.50 42 x 60 64 82 15 9380 13265 14840 18778 21000
19.25 42 x 66 65 89 15 10318 14592 16324 20655 23100
21.00 42 x 72 65 95 15 11256 15918 17808 22533 25200
22.75 42 x 78 65 101 15 12194 17245 19292 24411 27300
24.50 42 x 84 66 108 15 13132 18571 20776 26289 29400
26.25 42 x 90 66 114 15 14070 19898 22260 28166 31500
28.00 42 x 96 67 121 15 15008 21224 23744 30044 33600
29.75 42 x 102 68 128 15 15946 22551 25228 31922 35700
31.50 42 x 108 68 134 15
16884 23877 26712 33800 37800
16.00 48 x 48 68 68 17 8576 12128 13568 17168 19200
18.00 48 x 54 70 76 17 9648 13644 15264 19314 21600
20.00 48 x 60 71 83 17 10720 15160 16960 21460 24000
22.00 48 x 66 72 90 17 11792 16676 18656 23606 26400
Hoods wider than 98" will ship knocked down.
Insect Screens - Add .10 to area shown in table. Damper - Add .10 to area shown in table. Filters - Add .17 to area shown in table.
MODEL BGH
FABRICATED GRAVITY RELIEF/INTAKE VENTILATORS
MODEL BGH
FABRICATED GRAVITY RELIEF/INTAKE VENTILATORS