Drainable Louver,Fixed,47-1/2 H,Alum
48 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 47 1/2 in, Outside Width 35 1/2 in, Rough Opening Height 48 in, Rough Opening Width 36 in, Louver Maximum Intake 4,099 cfm, Maximum Exhaust 5,855 cfm, Maximum Outside Width 35 1/2 in, Minimum Outside Width 35 1/2 in, Flange Width Not Applicable, Free Area 6 sq ft, Beginning Point of Water Penetration 1,031 fpm.