Round Ceiling Diffuser Vent Covers with Sealing Technology

6" Round Ceiling Vent Covers. Our closed cell foam seal eliminates air flow between hot and cold spaces, saving energy and preventing condensation, mold, and water damage. These vents, featuring a sealing surface of 7 1/8" to 7 3/4" diameter, are easily installed by homeowners and help reduce heat loss by preventing warm air from rising into attic duct work. Enhance your living space and protect your home with our powerful patent pending innovation. Don't wait, completely seal your vents with and without dampers today!