Combo Louver Damper, Adj, 47-1/2 H, Alum, DAYTON, Mfr# 5NKJ1

42 In.H 45 In.W Drnbl Extrd Alu Combo Dmpr, Louver Type Combination, Frame Type Hat Channel, Outside Height 47 1/2 in, Outside Width 47 1/2 in, Rough Opening Height 48 in, Rough Opening Width 48 in, Louver Maximum Intake 5,027 cfm, Maximum Exhaust 7,219 cfm, Flange Width Not Applicable, Free Area 7.2 sq ft, Beginning Point of Water Penetration 1,118 fpm, Maximum Air Velocity 3,000 fpm, Blade Angle 45 Degrees , Material Aluminum, Inside Height 46 1/2 in, Inside Width 45 3/4 in