The heat demand of this familiy house is 11 kW, so a Junkers heat pump was installed with 10,7+9 kW nominal performance.
This heat pump supplies the domestic hot water demand, too and it has a weather-dependent regulator.
There are 2 pieces BHEs with 100 m depth on the primary side of this system. The pipes are single BHE with 40 mm diameter and the primary side is filled with ethylene glycol and water. The grouting material is bentonite-cement. This system utilized 8,8 kW geothermal heat.
The free-cooling is done by heat exchanger on the primary side. The heat pump and the existing solar collector system heat a common tank and the underfloor heating is heated from this by az outside heat exchanger.
The owner gained financial support to installation of heat pump system - according to the plan this heat pump system was installed by the HGD Ltd.