A geothermal heat pump or ground source heat pump (GSHP) is a central heating and/or cooling system that pumps heat to or from the ground. It uses the earth as a heat source (in the winter) or a heat sink (in the summer).
Electrically powered systems that tap the stable, residual heat stored immediately below the surface of the earth to provide heating and hot water for homes and offices. Also known as geothermal heat pumps. See also geothermal energy.
Transferes heat in the winter from the ground into a structure using a compressor-The process is reversed in the summer