Ground source heat pumps use underground pipes to extract heat from the ground, which is then used to heat radiators, underfloor or warm air heating systems and hot water in your home.
A mix of water and antifreeze flows around a loop of pipe which is buried underground in your garden.
The ground emits heat which is is absorbed into the fluid and then passes through a heat exchanger into the heat pump.
As the ground stays at a fairly constant temperature under the surface, the heat pump can be used throughout the year, even in winter.
The length of the ground loop depends on the size of your home and the amount of heat you need. Longer loops can draw more heat from the ground, but need more space to be buried in. If space is limited, a vertical borehole can be drilled instead.
What are the benefits of a ground source heat pump?
It can lower fuel bill costs, particularly if it replaces an inefficient electric system
It can reduce your household carbon emissions
Systems can provide hot water in addition to heating your home
Ground source heat pumps require a minimum amount of maintenance
A steady supply of heat is supplied for long periods