Ground source heating draws stored solar heat from the bedrock. A heat pump raises it to the temperature the house needs, and for every kilowatt-hour of electricity you pay for you get three to five back as heat.
What decides the sums
The higher your current heating cost, the faster the system pays for itself. Direct electric and oil give the shortest payback, district heating the longest.
A typical house borehole is drilled 150–220 metres. Bedrock depth and the heat demand of the house decide it.
Before you order
Drilling requires notification to the municipality, and distances to boundaries and neighbouring boreholes are regulated. We handle the paperwork.
If the house already has water-borne radiators the switch is straightforward. Without them the installation costs considerably more.
Calculate over the whole service life, not just the investment. A system lasts 20 years or more, and the compressor is the part replaced first.
