Geothermal heat pumps, or ground source heat pumps (GSHP) have been around for more than half a century. The technology exploits the constant temperatures we find right below the Earth’s surface, either for heating or cooling purposes, and has significantly higher efficiency than electrical heating, furnaces or even air source he
Geothermal heat pumps provide wintertime heating by extracting heat from a source and transferring it to the building. A ground source heat pump uses the top layer of the earth crust (usually three to 500 feet deep) as a source of heat, thus taking advantage of its seasonally moderate temperatures. In the summer, the process can be reversed so the heat pump extracts heat from the building.