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Tools & Home Improvement > Building Supplies > Heating & Cooling > Ducting |
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Product Description Our Premium Back Draft Damper is a non-mechanical in-line one way air flow valve that requires minimal pressure to operate, has no moving parts and tested to UL 723 standards. Get the full force of your fan with this non-restrictive damper which fits snugly inside the duct.Our Premium In-Line Back Draft Dampers! Battic Door Premium and Economy In-Line Duct Back Draft Blocker 7 in. Diameter Shipping Weight: 2 pounds | ||||||||
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