Aluminum Round Backdraft Damper
The model A389 true round backdraft damper is a manufactured using .080" aluminum. The frame is roll formed with two beads which adds rigidity to the frame and act as a stop for the attached ductwork. This damper is designed to tightly close when the blade contacts the ¼" neoprene seal that is attahed to the damper frame. Designed to operate with assist or resot counter balance.