Louver Wall Opening 48x48In Galvannealed

48 In.H 48 In.W Non-Drnbl GSteel Modulr Louver Louver Type Stationary Blade Frame Type Hat Channel Frame Depth 4 in Mounting Style Flush Mount Outside Height 47 1/2 in Outside Width 47 1/2 in Rough Opening Height 48 in Rough Opening Width 48 in Louver Maximum Intake 5 484 cfm Maximum Exhaust 7 834 cfm Maximum Outside Width 47 1/2 in Minimum Outside Width 47 1/2 in Flange Width Not Applicable Free Area 7.1 sq ft Beginning Point of Water Penetration 709 fpm