Guide to Buying Energy-efficient Dehumidifiers

An ENERGY STAR-qualified dehumidifier removes the same amount of moisture as a similarly sized standard unit. With more efficient refrigeration coils, fans and compressors, they use up to 20 percent less energy than standard models.

Energy-efficient Dehumidifiers

Facts and Product Knowledge

  • Models are available that are rated for use at temperatures as low as 42 degrees Fahrenheit.
  • The energy efficiency of a dehumidifier is measured by its energy factor. In general, a higher energy factor means a more efficient dehumidifier.
  • For maximum dehumidification and energy efficiency, properly size the space to be dehumidified and the conditions that exist in the space.


  • Shop for a model that has a humidistat, allowing you to set the desired relative humidity level for a room or area in your home.
  • For better operation of a non top-mounted air discharge unit, place the dehumidifier away from walls and furniture so that air can circulate freely around the unit; and away from dust and dirt, which can clog coils and grills.
  • Doors and windows to the space being dehumidified should be closed while the unit is running to ensure that the space is dehumidified as efficiently as possible.

Information in this article is courtesy of the New York State Energy Research and Development Authority (NYSERDA). For more information, visit