How do geothermal heating systems work?

The sub-surface of the Earth contains heat, or geothermal energy, that is retained at largely constant levels throughout the year, regardless of the season. This heat has historically remained unused, but the development of geothermal heating systems in the past century have meant that we can now use this geothermal energy to heat our homes.

The longer the ground loop pipe, the more heat will be collected. The length of the pipe will depend on the size of the property and the amount of heat needed to keep the home at a comfortable temperature throughout the year.

A heat pump installer will be able to advise you on the most suitable system for your needs before beginning the process of burying the pipe underground.

Ground source heat pumps operate at around 35-50°C. This is lower than boiler systems, which operate at around 70-80°C. While operating at a lower temperature, ground source heat pumps can be highly efficient and keep a home warm throughout the colder months.

It is worth bearing in mind, however, that geothermal heating systems are most appropriate for homes with underfloor heating systems.

• The sub-surface of the Earth contains heat, otherwise known as geothermal energy.
• Ground source heat pumps use a ground loop to collect heat and use it to power a home’s central heating system.
• Ground source heat pumps operate at a lower temperature than boilers heating systems.
• Geothermal heating systems are environmentally friendly and are eligible for financial support through renewable incentives such as BUS or HES funding.