Down in the bedrock there is a source of heat that stays at practically the same temperature all year round. Using heat from the rock is a secure, safe and environment-friendly way of heating all types of building, large and small, public and private.
The capital cost is relatively high, but in return you get a reliable, low-energy form of heating with an extremely long life. The coefficient of performance (COP) is good, as high as 4.8. The plant occupies little space and can even be installed on small plots. Very little reinstatement work is needed after drilling the borehole, so the effect on the nearby environment is minimal. The groundwater level is not affected, since no groundwater is used.
The heat energy can be transferred to an existing, conventional, water-borne heating system and can also be used to produce hot water.