Ground source heat pumps use pipes which are buried in the ground to extract heat from the ground. The ground stays at a fairly constant temperature just a few feet below the surface, so the heat pump can be used all year round.
A ground source heat pump is electrically driven and uses a refrigerant circuit, extracting heat from the ground. This heat is absorbed at low temperatures into a fluid inside specially installed pipes buried underground. The fluid then passes through a compressor which raises it to a higher temperature, ready to be delivered to your heating and hot water systems.
Ground source heat pumps offer the highest efficiency of all heating systems.
The heat generated is capable of heating water sufficiently to use as either hot or heating and hot water for underfloor heating and even radiators. Air source heat pumps are far more efficient than the best gas boilers.