Description
19.75" Barometric Damper automatically opens when cooler is on and closes off the duct when cooler is turned off. High grade aluminum frame and vanes with nylon hinges and weatherstripping insulation for thermal seal. Fits 20" cooler roof jack.
3 Reviews
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Works great!
Damper is good quality and performs as it should.
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20" DOWNDRAFT BAROMETRIC DAMPER
Fast shipper & good parts
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Works Great
Well made of aluminum. Slid snugly into my roof jack. Simple to install.