42 in Whole House Fan Premium Ceiling Truss Shutter / Ceiling Shutter
W Aluminum Ceiling Truss Damper, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 1500 fpm, Overall Height 43 in, Rough Opening Shape Rectangular, Fits Fan Diameter 42 in, Free Area 6.43 In.H 32 In.1 in, Frame Depth 1 3/8 in, Rough Opening Length 41 in, Maximum Pressure 1 in wc, Rough Opening Width 30 in, Blade Material Aluminum, Closure Type Gravity, Flange Width 1 5/8 in.