Butterfly Backdraft Damper(14 Inch) (BD 14)

Added it to my return air duct in my attic mounted furnace to prevent cold air from dropping down from the ceiling vent when it is not running.

Received quickly, seems like sturdy construction and the butterfly pieces are light weight, which is great from a drag standpoint. The flaps rest on a soft piece of foam so it closes quietly.

Perfect, as described.