Louver Adj w/ 28 to 46 In Aluminum

18 In.H 28 In.W Non-Drnbl Alu Intake Louver Louver Type Stationary Blade Frame Type Flanged Frame Depth 4 in Mounting Style Surface Mount Outside Height 18 in Outside Width 28 in Rough Opening Height 14 in Rough Opening Width 24 in Louver Maximum Intake 1 565 cfm Maximum Exhaust 2 240 cfm Maximum Outside Width 46 in Minimum Outside Width 28 in Flange Width 2 in Free Area 1.3 sq ft Beginning Point of Water Penetration 766 fpm Maximum Air Velocity 3000 fpm Blade Angle 45 Degrees