4″ BACK DRAFT DAMPER

Specifications

eFlow 4" Spring loaded BACK DRAFT DAMPER. Key FACTs: • 20-gauge galvanized steel housing • Aluminum spring-loaded butterfly damper blades • Damper seals against EDPM rubber gasket in closed position for minimal leakage • Gasket designed for use in temperatures up to 122° F • Requires airflows of 0.04 to 0.08 in. w.g. to begin to open • May be installed in any position • The entire assembly inserts into duct for simple installation • Exterior foam gaskets provide a tight seal against interior surface of duct

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