Aldes 7 Backdraft Damper - BDD7: Tools & Home Improvement

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Aldes 7 Backdraft Damper - BDD7 Dec 21st 2012, 15:07 Category: Tools & Home Improvement Vendor: Part Number 99 035Item Package Quantity1 Product Description : Backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for positive closure. Fits 7" Round Duct ? 20 gauge galvanized steel housing? 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 - 22F to 180F? Require from 0.04 to 0.08 inches W.G. to begin to open? May be installed in any position. ? Simple installation - entire assembly inserts into duct? Exterior foam gaskets assure a tight seal against interior surface of duct

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