Intake Louver Fixed Drainable 42H x 48W

45 In.H 51 In.W Drnbl Extrd Alu Intake Louver Louver Type Stationary Blade Frame Type Flanged Frame Depth 4 in Mounting Style Surface Mount Outside Height 41 1/2 in Outside Width 47 1/2 in Rough Opening Height 42 in Rough Opening Width 48 in Louver Maximum Intake 7 753 cfm Maximum Exhaust 11 086 cfm Maximum Outside Width 50 1/2 in Minimum Outside Width 50 1/2 in Flange Width 1 1/2 in Free Area 7.2 sq ft Beginning Point of Water Penetration 1 031 fpm Maximum Air Velocity 3500 fpm