Ground source heat pump at Croome

The idea is that they are going to bury a lot of pipes under the field in front of the house. In the winter it is warmer underground than above ground. There is a mixture of water and anti-freeze in the pipes. Thermal energy can get the from the ground into the liquid by travelling along the temperature gradient due to the temperature difference. The thermal energy is then taken up to the house. Sounds unbelievable but it works.