15 In.H-W 5.75 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2500 fpm, Overall Height 15 in, Rough Opening Diameter 12 1/2 in, Rough Opening Shape Square, Fits Fan Diameter 12 in, For Duct Shape Not Applicable, Free Area 0.8 sq ft, Overall Width 15 in, Frame Material Thickness 0.8 in, Overall Length 5 3/4 in, Connection Type Not Applicable, Frame Depth 2 1/2 in This model is a rear flanged general purpose exhaust shutter. The blades have a galvanized steel reinforcement strip across the top of each blade for added strength and counter balancing efficiency. The blades also feature a felt seal on the leading edge for quiet closing and better protection from the weather.
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