Intake Louver Fixed Drainable 42H x 54W

45 In.H 57 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 53 1/2 in Rough Opening Height 42 in Rough Opening Width 54 in Louver Maximum Intake 8 786 cfm Maximum Exhaust 12 564 cfm Maximum Outside Width 56 1/2 in Minimum Outside Width 56 1/2 in Flange Width 1 1/2 in Free Area 8.5 sq ft Beginning Point of Water Penetration 1 031 fpm Maximum Air Velocity 3500 fpm