• Flange – (on in-take side or out-put side)
• Counter balance
• Spring load
*Download the spec sheet above for the Standard Construction information
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.