42 in Backdraft Damper / Intake Shutter, 43 in x 43 in, DAYTON, Mfr# 3HHT2

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, Frame Material Thickness 0.1 ga, Frame Depth 1 5/8 in, Rough Opening Length 43 in, Maximum Pressure 1 in wc, Rough Opening Width 43 in, Blade Material Aluminum, Single Acting/Double Acting Single Acting, Closure Type Spring, Flange Width 1 3/8 in