These pumps take heat from the ground or water and use it for space heating and hot water. They work best in new and well insulated buildings with underfloor heating.
To install a ground source heat pump you need plenty of outside space for the pipework which is generally buried in horizontally trenches. It can also be inserted vertically in boreholes where there is insufficient space.
The geology of the ground around your property is important in determining whether a ground source heat pump is suitable.
Ground source pumps are eligible for RHI index-linked payments over twenty years.