(BDD) Backdraft Damper – Low Velocity

BDD spec sheet (PDF)

The BDD dampers offer back draft protection in light duty applications.

The damper frame is a 16ga welded galvanized construction that is undersized 1/4″ to fit inside the duct. The .025 aluminum blades are attached to the frame with 1/4″ round plated rod and bronze bushings.

The stamped aluminum brackets and linkage keep the blades operating together and the felt blade stops provide for quiet operation.