Use with vertical-mounted exhaust fans shutters open automatically when fan is activated. Galvanized steel frame with felted aluminum louvers for quiet operation. Nylon bushings and stainless steel pivot pins. 932 x 12 mounting holes. Do not use with... more
25 In.H-W 6 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Galvanized Steel Number of Panels1 Maximum Air Velocity 2000 fpm Overall Height 25 in Rough Opening Diameter 22 1/2 in... more
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