This damper is for use in roof curbs, ductwork, and wall collars when using a fan or power roof ventilator. The G-90 galvanized frame is 2" deep. Features include mill-finish aluminum louvers, stainless steel pivot pins and rivets, and nylon bushings. Item: Backdraft Exhaust Damper Type: No Flange, Horizontal or Vertical Mount Damper Size (In.): 13-3/4 x 13-3/4 Overall Size (In.): 13-3/4 x 13-3/4 Max. Velocity (FPM): 2000 Construction Material: G-90 Galvanized Steel Frame and Aluminum Blades Includes: Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet Operation
