A geothermal heat pump uses the heat stored in the ground to efficiently heat and cool buildings and generate hot water. Constant temperatures prevail all year round even at depths of just a few metres. This stable energy source makes geothermal heat pumps particularly efficient.

Here is how the process works step by step:

1. Heat absorption from the ground
   Heat is extracted from the ground via geothermal probes (deep boreholes) or ground collectors (surface collectors). A frost-proof fluid (brine) transports this energy to the heat pump.
2. Compression and temperature increase
   In the heat pump, a compressor raises the temperature of the geothermal energy extracted so that it can be used for heating and hot water.
3. Heat transfer to the heating system
   The heat generated is transferred to the heating system in the house (e.g. underfloor heating or low-temperature radiators).
4. Regeneration of the ground
   After the heat has been transferred, the cooled brine flows back into the ground, where it absorbs heat again: the cycle begins anew.

Advantages of a geothermal heat pump

• very high efficiency due to constant ground temperatures
• low operating costs and high government subsidies
• low CO₂ emissions and future-proof
• Independent of weather and outside temperatures

In short: a geothermal heat pump converts free, renewable energy from the ground into usable heating energy with the help of electricity, and is quiet, reliable and particularly efficient.