Intake Louver, Fixed, Drainable, 54H x 30W, DAYTON, Mfr# 20UA51

57 In.H 33 In.W Drnbl Extrd Alu Intake Louver, Louver Type Stationary Blade, Frame Type Flanged, Frame Depth 4 in, Mounting Style Surface Mount, Outside Height 53 1/2 in, Outside Width 29 1/2 in, Rough Opening Height 54 in, Rough Opening Width 30 in, Louver Maximum Intake 6,047 cfm, Maximum Exhaust 8,647 cfm, Maximum Outside Width 32 1/2 in, Minimum Outside Width 32 1/2 in, Flange Width 1 1/2 in, Free Area 6 sq ft, Beginning Point of Water Penetration 1,031 fpm, Maximum Air Velocity 3500 fpm