Ground source heat pumps collectors are designed to extract  heat energy from a number of heat sources providing greater flexibility, affordability and compatibility with a range of applications.

Heat energy is stored in the ground and water all around us, at a constant temperature all year round. Ground source heat pumps are designed to extract this heat energy via various ground collectors; borehole in rock, slinky pipe in soil, or pond mat in a lake.  With these choices we can find the right one to suit your home.

What types of collectors are there?


If a water source or sufficient space for ground loops is not available, drilling boreholes is an option. A series of boreholes take the collector pipe straight down into the ground rather than horizontally. This takes up a much smaller surface area and can be done in a diveway.

Borehole drilling is the most expensive so it is important you look into other options first, for example; water source and ground loop collectors. But it is the quickest and less invasive option.


Some installers may suggest using high density coils of collector pipe called slinkies. This form of collector can be laid down in appropriate ground conditions but it is advised that you do all research on the soil conditions beforehand. The use of slinkies can result in the same total length of collector pipework being installed in a significantly smaller area of land.

Closed loop collectors for water heat sources

Using a lake or river as the heat source is the most efficient option, as water has excellent heat transfer qualities and its temperature is regularly refreshed. Installing the collector in a lake or any permanent water source will normally reduce the necessary collector pipe length.

How much collector is needed?

It depends on the heat requirement for the house and to work this out we will do a heat loss calculation. This works out how much heat the house is losing and how much heat we will need to replace.  How much collector is also determined by the type of ground for example clay is more conductive than sand.

Home renewables will be able to help answer your questions and help you choose the correct system for your home and requirements. Please feel free to call us on 01387 26485701387 264857 and we will be able to discuss things with you or alternatively email us at