Tjernlund 18 in. x 4 in. x 11 in. Moisture Mold Reducing UnderAire Crawlspace Ventilator Fan V4D - The Home Depot

The Tjernlund UnderAire Series Crawl Space Ventilators are designed to circulate fresh outdoor air underneath homes and porches. Excessive humidity levels in Crawl Spaces is the leading cause of premature
The Tjernlund UnderAire Series Crawl Space Ventilators are designed to circulate fresh outdoor air underneath homes and porches. Excessive humidity levels in Crawl Spaces is the leading cause of premature rotting of support columns, joists, floors and beam supports. Humidity can promote fungus growth and increased termite activity. Humidity may also cause plumbing failures due to rust and corrosion. Constant operation helps vent radon gases, treated wood off-gassing and other odors that might migrate into living areas. The (V4D) is controlled by a dehumidistat which actuates the fan if the relative humidity rises above the selected set-point.

One fan and small faceplate for ventilation openings through brick foundations. (Requires switch or dehumidistat to activate. Multiple ventilators may

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Tjernlund 18 in. x 4 in. x 11 in. Moisture Mold Reducing UnderAire

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▼ WHY USE A VENTILATION FAN: A ventilation fan benefits your home in several ways: ▼ It helps to reduce radon level in lower areas.▼Keeping your crawl

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