How does GeoExchange work?
A few feet beneath the surface, the earth’s temperature remains fairly constant year-round, ranging from 45º or so in northern latitudes to about 70ºF in the deep south. GeoExchange takes advantage of this constant temperature to provide extremely efficient heating and cooling.
In winter, a fluid circulating through pipes buried in the ground absorbs heat from the earth and carries it into the home. The GeoExchange system inside the home uses a heat pump to concentrate the earth’s thermal energy and then to transfer it to the interior space for warmth.
In the summer, the process is reversed: heat is extracted from the air in the house and transferred through the heat pump to the ground loop piping. The fluid in the ground loop then carries the heat back to the earth. The only external energy needed for GeoExchange is the small amount of electricity needed to operate the heat pump, ground loop pump and distribution fan or pump.