39 In.H 39 In.W Drnbl Extrd Alu Combo Dmpr, Louver Type Combination, Frame Type Flanged, Outside Height 35 1/2 in, Outside Width 35 1/2 in, Rough Opening Height 36 in, Rough Opening Width 36 in, Louver Maximum Intake 4,244 cfm, Maximum Exhaust 6,068...