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The ideal humidity level for a basement is between 30 and 50 percent. The prime growing conditions for unwanted mold and spores start at around 60 percent. More »

www.reference.com Home & Garden Heating & Cooling

The term "basement humidity level" refers to the moisture content of the air in a basement. A humidity level above 80 percent encourages mold and mildew development, according to Basement Health Pros. The ideal humidity ... More »

www.reference.com Science Weather & Tides

The ideal humidity for a basement, finished or unfinished, is at or below 50 percent relative humidity. Relative humidity is the percentage of water vapor in the air as compared to the maximum amount it can hold. At 50 p... More »

www.reference.com Home & Garden Home Maintenance
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To maintain the correct humidity level in a basement, place a dehumidifier in the basement, and connect it to the existing main stack, feeder drain or utility sink. If the dehumidifier doesn't measure the level of humidi... More »

www.reference.com Home & Garden Heating & Cooling

A dehumidifier with a built-in humidistat is generally set at a relative humidity level between 30 and 50 percent. If winters are cold and heating systems are needed, a level between 30 and 40 percent keeps windows from ... More »

www.reference.com Home & Garden Heating & Cooling

The term "basement humidity level" refers to the moisture content of the air in a basement. A humidity level above 80 percent encourages mold and mildew development, according to Basement Health Pros. The ideal humidity ... More »

www.reference.com Science Weather & Tides

Maintaining an indoor relative humidity of approximately 45 percent is the ideal level for the summer months or warmer climates. Colder climates or the winter months require even lower levels, approximately 30 to 40 perc... More »

www.reference.com Home & Garden Heating & Cooling