An air source heat pump uses energy from the outside air to efficiently heat and cool buildings and provide hot water. Even when outside temperatures are low, the air still contains usable heat, which can be efficiently utilised with modern heat pump technology.

Here's how an air source heat pump works, step by step:

1. Heat absorption from the outside air:
   A fan draws in outside air and feeds it through a heat exchanger. This absorbs the environmental heat contained in the air.
2. Compression and temperature increase:
   A refrigerant absorbs the heat, evaporates and is then compressed by a compressor. This raises the temperature to a level that 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, for example to underfloor heating or efficient radiators.
4. Recirculation and cycle:
   After the heat has been transferred, the refrigerant cools down, liquefies and absorbs heat from the outside air again. The cycle starts all over again.

Advantages of an air source heat pump:

An air source heat pump offers simple installation without earthworks, comparatively low investment costs, flexible use in new buildings and renovations, and climate-friendly operation with government subsidies.

In short, an air source heat pump extracts heat from the outside air and uses electricity to make it usable for heating and hot water. It is efficient, space-saving and future-proof.