Geothermal System The geothermal pump system takes advantage of the relatively constant year-round temperature of 40-60ºF below the surface of the earth by exchanging heat between water that is pumped down holes into the earth and compressed gas.
In summer, the hot air in the building is transferred to the compressed gas heat exchanger, which then passes the heat back through the water to the earth. The system uses some electricity to run the pumps and to blow the heated or cooled air through the ducts. |
In winter, water pumped up from the earth gives heat to the compressed gas, heating it beyond the ground temperature.