Control the moisture in your home with a dehumidifier. Mold is a serious health issue, especially for people who already suffer from allergies. Excess moisture (higher than 50% relative humidity), commonly found in basements and particularly in the summer months, can be a breeding ground for dangerous mold, mildew, dust mite and bacteria growth. It is highly recommended to use a dehumidifier to control the level of humidity to ensure that these unhealthly allergens cannot survive and spread throughout your house.