Prevent mold and mildew growth while improving indoor air quality with a dehumidifier. Getty Images / Meaco When the humidity in a home is too high, homeowners can use a dehumidifier to remove excess moisture that may otherwise condense on the pipes, ductwork, and other cold surfaces. Use this guide to discover what a dehumidifier is and how it works.What a Dehumidifier DoesDehumidifiers are home...