Studies have shown that as much as 50% of the air in a home comes up from the basement or crawl space. This air is often higher in moisture content and carries with it various allergens and musty odors. The Environmental Protection Agency, American Lung Association, and American Medical Association all recommend maintaining the relative humidity (RH) in the 30% – 50% range.
When conditions linger above 60% RH for extended periods of time; mold, mildew, and bacteria grow.
A commercial grade Santa Fe high-efficiency dehumidifier is designed to consistently maintain 50% or less RH in crawl spaces and basements.