Louver Adj w/ 40 to 52 In Galv Steel

28 In.H 40 In.W Non-Drnbl GSteel Intake Louver Louver Type Stationary Blade Frame Type Flanged Frame Depth 4 in Mounting Style Surface Mount Outside Height 28 in Outside Width 40 in Rough Opening Height 24 in Rough Opening Width 36 in Louver Maximum Intake 3 030 cfm Maximum Exhaust 4 330 cfm Maximum Outside Width 52 in Minimum Outside Width 40 in Flange Width 2 in Free Area 3.2 sq ft Beginning Point of Water Penetration 766 fpm Maximum Air Velocity 3000 fpm