All About Ground Works

Ground Loops

Ground loops consist of a series of pipes buried in the garden at a depth of 1 metre. The ground temperature at this depth is fairly constant between 7 and 13°C throughout the year. The heat pump uses a ground loop (pipe) with a water and glycol mix to "capture" some of this heat.

There are two main types, and the one to use depends on the amount of land available:
Straight ground loop;
Slinky ground loop;
 

• More on Ground Loops

Compact Collectors

• More on Compact Collectors

Bore Holes

Bore holes offer a solution where very little land is available. A vertical hole is drilled to a depth of 50 to 80 metres through the rock underneath the garden.
 

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Streams, Rivers and Lakes

The option also exists to bury a pipe on the bottom of a lake or river and collect heat from the stream water.
 

• More on lake and river collection