backdraft dampers prevent backflow of exhaust air when installed in standard round duct

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Continental Fan's spring-loaded backdraft dampers allow minimum air leakage and are designed for vertical or horizontal mounting.

Features and Benefits:

20 gauge galvanized steel housing
Eight sizes ranging from 4" to 16" in diameter
Aluminum spring-loaded butterfly damper blades
Damper seals against EPDM rubber gasket in closed position for minimal leakage
Gasket designed for use in temperatures from 22° F to 180° F
Requires from 0.04 to 0.08 inches W.G. to begin to open
May be installed in any position. Note: 7”, 14” and 16” models can be installed in horizontal or vertical (upblast only) position.
Simple installation--entire assembly inserts into duct.
Exterior foam gaskets assure a tight seal against interior surface of duct.