Open Loop Ground Source Heat Pump

With an Open-Loop installation, a water supply borehole is drilled and water at a temperature of around 11°C is pumped into the building, where flow could be diverted to feed both a potable (drinkable) water supply and an open-loop heat pump. The heat pump extracts heat from the water and uses it to raise the temperature of water being circulated throughout the building. There are usually two separate water circuits, one for space heating up to 55 °C and another for domestic hot water up to 65°C.