Geothermal Heating

What is a geothermal heating?

Geothermal heating is a system that uses the Earth’s ability to store heat in the ground or water. These systems operate based on the stability of underground temperatures: the ground a few feet below surface has a very stable temperature throughout the year, depending upon the location’s annual climate. For the UK, this can a few hundred feet below the surface.

What is a ground source heat pump?

Ground source heat pumps are electrically powered systems that utilize the Earth’s constant temperature to provide heating, cooling, and hot water for homes and buildings.

How do ground source heat pumps work?

Ground source heat pumps have either closed or open loops. The available land areas and the soil and rock type at the installation site will help determine the most economical choice (system type) for installation of the ground loop.
An antifreeze solution is circulated through plastic pipes buried beneath the ground for closed loop systems, or the main inlet of the building in open systems. The fluid gathers heat from the earth and circulates it through the system and into the building. During the summer, the system can reverse itself and pulls heat from the structure and places it in the ground. This process creates free warm water in the summer and produces a considerable savings on warm water in the winter.

In the picture below the red arrowed pipe represents warm liquid, whereas the blue indicates cooler liquid. The white box represents the equipment in the dwelling. The pump does not have to be located in a cellar or basement, above ground buildings or other spaces can also be used.

How Do You Save Money On Bills?

For every unit of electricity used to pump the heated fluid, generally 3-4 units of heat are produced. Meaning your existing heating will have to work less hard to heat to the desired temperature.

Government Grants

There is financial help available if you’re planning to make energy saving improvements to your home. The Government, energy suppliers and local authorities all provide grants to help you implement energy saving measures in your home.

Visit the Energy Saving Trust website to find out more.