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The Tamarack Cape Backdraft 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. 5 sizes available.

Suggested applications:
Bathroom Exhaust ducts (stops the clanging sound during storms and cold air from coming in)
Kitchen exhaust and or range Hoods, individual or trunk.
Passive inlet to provide fresh air into the home.

 UPS ground shipping within the Continental U.S. all others call for quote. No Sales Tax!

Click on the image below to view installation video