Intake Louver Fixed Drainable 54H x 36W

57 In.H 39 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 35 1/2 in Rough Opening Height 54 in Rough Opening Width 36 in Louver Maximum Intake 7 391 cfm Maximum Exhaust 10 569 cfm Maximum Outside Width 38 1/2 in Minimum Outside Width 38 1/2 in Flange Width 1 1/2 in Free Area 6.8 sq ft Beginning Point of Water Penetration 1 031 fpm Maximum Air Velocity 3500 fpm