44.75 In.H-W Alu Universal Backdraft Dampr, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 44 3/4 in, Rough Opening Shape Square, Fits Fan Diameter 42 in, Free Area 9.7 sq ft, Overall Width 44 3/4 in,...
44.75 In.H-W Alu Universal Backdraft Dampr, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 44 3/4 in, Rough Opening Shape Square, Fits Fan Diameter 42 in, Free Area 9.7 sq ft, Overall Width 44 3/4 in,...