Intake Louver Fixed Drainable 36H x 42W

39 In.H 45 In.W Drnbl Extrd Alu Intake Louver Louver Type Stationary Blade Frame Type Flanged Frame Depth 4 in Mounting Style Surface Mount Outside Height 35 1/2 in Outside Width 41 1/2 in Rough Opening Height 36 in Rough Opening Width 42 in Louver Maximum Intake 5 375 cfm Maximum Exhaust 7 686 cfm Maximum Outside Width 44 1/2 in Minimum Outside Width 44 1/2 in Flange Width 1 1/2 in Free Area 5.5 sq ft Beginning Point of Water Penetration 1 031 fpm Maximum Air Velocity 3500 fpm