Louver Damper, Adjustable, 60H x 36W, DAYTON, Mfr# 20UC11

62.5 In.H 38.5 In.W Drnbl Extrd Alu Combo Dmpr, Louver Type Combination, Frame Type Flanged, Outside Height 59 1/2 in, Outside Width 35 1/2 in, Rough Opening Height 60 in, Rough Opening Width 36 in, Louver Maximum Intake 7,510 cfm, Maximum Exhaust 10,740 cfm, Flange Width 1 1/2 in, Free Area 6.7 sq ft, Beginning Point of Water Penetration 1,118 fpm, Maximum Air Velocity 3000 fpm, Blade Angle 45 Degrees , Material Aluminum, Inside Height 58 1/2 in, Inside Width 33 3/4 in, Number of Blades 12