Damper, Vert/Horiz Mtg, 23 3/4 Sq

Backdraft Exhaust Damper, No-flange, Horizontal or Vertical Mount, Damper Size 23 3/4 x 23 3/4 In, Overall Size 23 3/4 x 23 3/4 In, Max Velocity 2000 FPM, Construction Material G-90 Galvanized Steel Frame and Aluminum Blades, Includes Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet Operation RestrictionsWARNING: Not for use with kitchen exhaust applications. No-Flange Horizontal/Vertical MountBackdraft DampersFor use in roof curbs, ductwork, and wall collars when using a fan or power roof ventilator. G-90 galvanized frame is 2" deep. Mill-finish aluminum louvers. Stainless steel pivot pins and rivets, and nylon bushings. Prepunched conduit knockout.For belt-drive centrifugal roof and wall ventilators. Max. velocity: 2000 fpm for models up to 19" and no-flange, 2250 fpm for 23" and larger.