Dayton 2C522 20 in Backdraft Damper / Wall Shutter

Dayton 2C522 20 in Backdraft Damper / Wall Shutter 20-1/2 in x 20-1/2 in

The shutters open automatically when the fan is activated. The 26-ga. mill-finish aluminum louvers are felted on the leading edge for quiet operation. Additional features include nylon bushings and stainless steel pivot pins.