BDD backdraft dampers improve comfort and save energy and money by keeping unwanted air from entering a duct when a fan is not operating. This can be very beneficial in keeping outside air from being drawn into a room, or preventing the reversal of indoor air when a number of fans are joined to exhaust through a common duct. Utilizing a backdraft damper in this manner prevents air that is being exhausted from one area from backing up into other areas connected by the common duct.
FEATURES & BENEFITS
• Neoprene damper seal minimizes leakage • 20 gauge steel housing, aluminum spring loaded butterfly damper blades • Gasket designed to withstand temperatures from -22 F to 180 F • Requires from 0.04 to 0.08 in. wg pressure to open • Simple installation in any position – entire assembly inserts into duct • Exterior foam gasket assures a tight seal against duct • Rolled metal sleeve with center post design
