Dayton Intake Louver,60x60 45C671

60 In.H 60 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 59 1/2 in, Outside Width 59 1/2 in, Rough Opening Height 60 in, Rough Opening Width 60 in, Louver Maximum Intake 8,187 cfm, Maximum Exhaust 10,688 cfm, Maximum Outside Width 59 1/2 in, Minimum Outside Width 59 1/2 in, Flange Width Not Applicable, Free Area 13.3 sq ft, Beginning Point of Water Penetration 1,031 fpm