Aldes 4" Backdraft Damper - BDD4


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Product
Our#:173852
Mfg:American Aldes
Mfg#:99 023
Availability
1-2 Weeks To Ship
Price: $15.66
Suggested: $18.50
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Backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for positive closure.  Fits 4" Round Duct

. 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 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