Geothermal heat pumps
, also known as ground-source heat pumps
, use the temperature of the earth to heat or cool a home. They can be more efficient than an air source heat pump
because the ground maintains an almost constant temperature of about 54 degrees. Typical geothermal heat pumps move fluid through buried
pipes, absorbing the earth's temperature. The fluid is then used in the heat pump heat or cool your home
Federal, local, or utility programs may offer incentives
for installing certain energy-efficient devices in your home.
Photo courtesy of Flickr user Dave Pape , via Creative Commons.