Geothermal heating

Geothermal heating is a system of heating (or cooling) your home by utilizing pipes buried underground and a heat pump to transfer heat from the earth. It takes advantage of the fact that the soil temperature below about five feet doesn’t change much (it’s about 10 C), no matter what time of year it is. Pipes circulate a liquid (often water) below the frost line either horizontally or vertically. In winter, the water warms to the ambient soil temperature by the time it re-enters the house, then a heat pump extracts the energy and heats water that flows in pipes under the floors or heats air blown through the air ducts.
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