Air Delivery Data Chart - PERM-A-STEEL
Net Face
Velocity
F.P.M.		 Resistance in Inches
of W.G.
nominal thickness

C.F.M. Capacity by Size

  1 inch 2 inch 10 x 20 16 x 20 16 x 25 20 x 20 20 x 25 24 x 24
267 .030 .025 282 467 597 600 768 897
356 .051 .040 376 623 796 800 1024 1197
445 .080 .069 469 779 995 1000 1279 1496
533 .125 .091 562 933 1192 1200 1532 1791
622 .180 .143 656 1089 1391 1400 1788 2091
711 .231 .188 750 1244 1590 1600 2044 2390
800 -- .292 844 1400 1789 1800 2300 2689
889 -- .370 938 1556 1988 2000 2556 2988
978 -- -- 1032 1712 2187 2200 2812 3287