Louver Damper, Adjustable, 42H x 60W, DAYTON, Mfr# 20UC37

44.5 In.H 62.5 In.W Drnbl Extrd Alu Combo Dmpr, Louver Type Combination, Frame Type Flanged, Outside Height 41 1/2 in, Outside Width 59 1/2 in, Rough Opening Height 42 in, Rough Opening Width 60 in, Louver Maximum Intake 8,602 cfm, Maximum Exhaust 12,301 cfm, Flange Width 1 1/2 in, Free Area 7.7 sq ft, Beginning Point of Water Penetration 1,118 fpm, Maximum Air Velocity 3000 fpm, Blade Angle 45 Degrees , Material Aluminum, Inside Height 40 1/2 in, Inside Width 57 3/4 in, Number of Blades 9