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Continental Fan Manufacturing BDD100 Spring Loaded Backdraft Damper for 4" Ducti, N/A
BDD backdraft dampers are available in the spring-loaded and gravity style backdraft dampers. The spring loaded dampers are available in 4", 5", 6", & with a center pin design and a 10" & 12" center post design. Features  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

Price is $38.00
Price: $38.05