UnderAire Deluxe One Fan Crawl Space Ventilator
Model V1D - Made in the USA!
UnderAireï¿½ 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 in your crawl space. 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.
This crawl space ventilator is equipped with a factory installed and pre-wired thermostat which will prevent operation of the fan below 35F. Controlled by a dehumidistat which actuates the fan if the relative humidity rises above the selected set-point
The only line of crawl space ventilators with a
special "suitable for damp locations" ETL listing. This model features one fan
and large faceplate sized for ventilation openings through block foundations.
Includes thermostat, dehumidistat, and pre-wired 6 foot power cord. The ventilator
is installed inside crawl space behind existing ventilation opening. Screws and
masonry wall anchors are included with this crawl space ventilator.
Download the Instruction Manual
Facts to know about Crawl Space
From Mississippi State University Extension Service
How to determine the number of UnderAire
Calculate the cubic area of the crawl space by multiplying the length x width x height. Divide this number by 15 to determine the minimum CFM necessary to fully ventilate the space in 15 minutes. Example: 20' wide x 40' long x 3' high crawl space = 2,400 cubic ft. 2400 cubic ft. 15 minutes = 160 CFM of ventilation. Choose two V1 or V1D crawl space ventilators or one V2D crawl space ventilator.
Made in the USA!