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Vent Air Flow Rates
| Model |
Stack Openings |
Inner Screen |
Air Speed |
Air Speed |
Intake and Withdraw |
|
Square Inches |
Square Inches |
Stack FPS |
Screen FPS |
GPM |
| S 4 |
12.57 |
70 |
22 |
3.94 |
860 |
| PD-SD 8-5 |
19.64 |
84.5 |
22 |
5.12 |
1350 |
| S 6 & SD 10-6 |
28.27 |
102 |
22 |
6.1 |
1940 |
| S 8 & SD 12-8 |
50.26 |
165 |
22 |
6.71 |
3450 |
| S 10 & SD 14-10 |
78.54 |
236 |
22 |
7.34 |
5400 |
| S 12 & SD 16-12 |
113.01 |
280 |
22 |
8.82 |
7700 |
| SD 18-14 |
153.93 |
352 |
22 |
9.57 |
10,500 |
| SD 20-16 |
210.06 |
402 |
22 |
10.77 |
13,500 |
| SD 24-20 |
314.16 |
628 |
22 |
15.24 |
21,500 |
| S 24 |
452.39 |
905 |
21.32 |
10.63 |
30,000 |
| SD 30-26 |
531.00 |
1470 (use 24” screen) |
22 |
7.86 |
36,000 |
| SD 36-32 |
804.25 |
1810 (use 24” screen) |
22 |
9.75 |
55,000 |
| SD 40-36 |
1018.00 |
2036 (use 24” screen) |
22 |
10.99 |
69,000 |
| SD 48-44 |
1520.00 |
3040(use 30” screen) |
21.11 |
10.55 |
100,000 |
|
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