Description
Description
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-gassingand 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.
Features
- Dimensions: 18" x 11" x 4", trimmable dimensions: 12 1/2" x 10 1/2"
- Includes adjustable dehumidistat, freeze protection limit and 6 foot grounded power cord
- Power ventilate musty, damp crawl spaces through existing passive vents
- Motor: 120 volts 50/60 hz, 0.24 amps maximum
- 540 CFM