Geothermal Heat Pump (GHP) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons. Heat pumps move heat from one place to another using electricity. Air conditioners and refrigerators are two common examples of heat pumps. Geothermal heat pumps (GHPs) are little different from air-source heat pumps. GHP systems exchange heat from the earth, while air-source heat pumps exchange heat from the air.
Geothermal heat pumps (GHPs) take advantage of the relatively stable moderate temperature conditions that occur within the first 300 meters (1,000 feet) of the surface to heat buildings in the winter and cool them in the summer anywhere in the world.GHPs are very efficient, using 25–50 percent less electricity than comparable conventional heating and cooling systems, and they produce less pollution.
