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Home > Crawl Space Ventilation

Crawl Space Ventilation Fans

Crawl space ventilation is an essential for your home. Avoid excess moisture in your crawl space. A lack of ventilation can cause mold and mildew growth, pest infestation and wood rot. Moist environments beckon frustrating pests and unsafe wood deterioration. How do you know if you need a crawl space ventilation system? If you have wet insulation or soil, organisms growing on the surface of your floor joists or musty odors in your crawl space or living area, invest in one of our high-quality crawl space ventilation systems. At RE Williams, we carry a range of simple and top-of-the-line confined space ventilators. For an effective, no-fuss solution to unwanted moisture, try the 220 CFM fresh air supply fan.

View our selection of crawl space ventilation tools before radon, treated wood off-gassing and odors affect your home.


How Much Crawl Space Ventilation do I need?

To determine how much crawl space ventilation you would need, follow this formula. First you need the cubic area of the crawl space.  This can be calculated by multiplying the length x width x height of your crawl space.

Divide this number by 15 to determine the minimum CFM (cubic feet per minute) necessary to fully ventilate the space in 15 minutes.

Example: Your crawl space is 30' wide x 40' long x 3' high.  Your crawl space is 3600 cubic feet.

3600 divided by 15 = 240 cfm needed from a crawl space ventilator

Learn 4 Facts in 60 seconds about crawl space ventilation

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