In the UK, the average temperature at 1 metre below the surface is 12°C (53°F) – this increases by roughly 2.6°C (36°F) for every 100m deeper down.
To tap into this energy you need a company to drill your boreholes. They'll need the expert knowledge and equipment to tackle any problems that may lie underground.
Geothermal drilling requires a specialist rig (or rigs) to bore holes into the earth. Each borehole is usually drilled to 125mm wide and can range between 80 and 210 metres down.
Once the boreholes are drilled they are grouted, connected and terminated in a small chamber below ground. Then 2 x 62mm flow and return pipes are connected from the chamber and to a heat pump that moves warmed fluid around the system.
How many bore holes you need and their depth will depend on the geology of your location and the kilowatts needed for your building. A 3-4 bed house needs around 1-3 boreholes and a commercial property many more.
Yes! In fact GSI are experts at drilling boreholes in tight spaces and geologically hard to drill areas like London. Many other drilling companies don't have the experience, knowledge or equipment to even make a start.
We can drill in your basement or driveway with the plant room situated inside or outside of your property or even your garage. If you live in an urban area and space is at a premium, a geothermal pump system can offer a surprisingly neat and tidy solution.
The initial stages of drilling can look untidy, but we always do our utmost to respect and minimise any disruption to your property. We take great care when moving machinery, and we protect any areas like your lawns, gardens and paved areas.