Ground source heating uses pipes which are buried in the garden to extract heat from the ground. This heat can then be used to heat radiators, underfloor or warm air heating systems and hot water in your home.
A ground source heat pump circulates a mixture of water and antifreeze around a loop of pipe – called a ground loop – which is buried in your garden. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. The ground stays at a fairly constant temperature under the surface, so the heat pump can be used throughout the year – even in the middle of winter.
There are a variety of ways of extracting the heat from the ground, you can use a ground loop system, vertical bore holes or radial drilling as shown in the third photo.
Since 2010 we have undertaken a number of large prestigious Ground Source projects as a specialist sub-contractor for public and private clients which included two MOD bases in Bristol and Somerset, a large scheme consisting of 54 bore holes,150 mtrs deep at a College of further education in Penzance Cornwall, and another one with 28 bore holes 152 mtrs deep at a new wing on a mental health hospital in Birmingham which included hundreds of mtrs of 160mm below ground pipe from the bore hole field to the base of the building and then transferred to welded stainless steel pipe up 3 floors and all through the roof space to the heat pumps.