Heat from the earth that’s better for the planet.
How does it work
Ground source heat pumps absorb heat stored in the earth through ground collectors – flexible pipes that are buried in the earth either horizontally or vertically.
A mixture of water and anti-freeze is circulated through the pipes, drawing heat from the ground as it circulates through the ground loop.
If you have a large garden or area of ground, you can bury horizontal collectors around 1.2m below ground, 0.75m apart.
Vertical boreholes make better use of limited space and are more efficient but are more expensive to install as they must be buried up to 100m deep.
A coiled horizontal collector, or a ‘slinky’, is a good compromise between performance and space saving.