The purpose of a dehumidifier is to remove excess humidity from the air, keeping your room dry and helping prevent mold and mildew growth. You can also use a hygrometer to directly measure humidity levels in your house. “We recommend keeping the relative humidity in your home between 30-50%. High humidity can increase ground-ozone levels, dust mites, and mold — all of which can be allergy or asthma trigger[s],” said Kenneth Mendez, president and CEO of the Asthma and Allergy Foundation of America (AAFA).
We found the best dehumidifiers for rooms of various sizes and different needs. See the FAQs section for information on how to shop for a dehumidifier, how to clean your unit, and more.