Intake Louver 42x42

42 In.H 42 In.W Drnbl Extrd Alu Intake Louver Louver Type Stationary Blade Frame Type Hat Channel Frame Depth 4 in Mounting Style Recess Mount Outside Height 41 1/2 in Outside Width 41 1/2 in Rough Opening Height 42 in Rough Opening Width 42 in Louver Maximum Intake 3 734 cfm Maximum Exhaust 4 875 cfm Maximum Outside Width 41 1/2 in Minimum Outside Width 41 1/2 in Flange Width Not Applicable Free Area 6.5 sq ft Beginning Point of Water Penetration 1 031 fpm