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This is a two-pack of automatic foundation vent covers sized for standard 8x16 inch crawl space openings. A bimetallic coil opens the louvers at about 70°F and closes them at about 40°F, with no wiring or power needed. The frame is high-density polyethylene with corrosion-free metal parts, so it suits damp crawl spaces and mobile home skirting. Compared with manual vent plugs or open grates, it handles the seasonal open-and-close job on its own, though it is a passive thermostat, not a powered fan.
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Lowest price we've seen: $56.99 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
This is a set of two automatic foundation vent covers for crawl spaces, sized for standard 8x16 inch openings. The vent opens fully at 70°F and closes at 40°F. It needs no electricity.
The vent is made of high-density polyethylene with corrosion-free metal parts. It is built to withstand harsh weather and keep moisture away from the foundation. By regulating air flow, it helps keep crawl space temperatures more consistent and helps protect pipes from freezing.
It replaces an existing vent in a standard opening. To install, position the vent and tighten the screws. No special tools are needed. It can be used with mobile home skirting vents and traditional foundations.
