What are the basic workings of a heat pump? A heat pump is a relatively new technology in the UK although they are widely used in Scandinavia and many parts of Europe where there is an abundance of renewably sourced electricity. A heat pump takes energy from outside and transfers it into heat to be circulated around a heating and hot water system. A heat pump uses electricity to run the components of a heat pump, principally a fan, compressor and circulating pumps to transfer the energy from the heat source into the heat sink or heating system. 7001i AW 7001i AW For demanding hot water needs – small to large size homes. Find out more 7400i AW 7400i AW Launching January 2022, our premium heat pump is our quietest for small to medium size homes. Find out more Hybrid Hybrid The best of both worlds - integrating a heat pump with a gas combi boiler. Find out more heat pump in a house What type of heat pumps are available? For use in a domestic heating system application, there are basically two forms of heat pump; Ground Source or Air Source. A Ground Source heat pump has a collection pipe filled with a Heat Transference fluid and collects heat from the ground. The collection pipework is normally a continuous, unjointed length of pipe buried in the ground either horizontally or vertically in a borehole. For an average sized domestic property, if the collection system was sited horizontally, it would require the pipe to be buried around one metre in depth and would occupy an area of ground similar in size to a tennis court. If the collection system is to be sited vertically then either one or more boreholes equivalent to around 150 metres deep would be needed. An Air Source heat pump takes the outside air as its heat source and is consequently easier and less expensive to install as there is no collection pipework to install into the ground. The outside unit contains a fan that draws into the unit outside air and transfers this into the refrigerant circuit which is then compressed to a high temperature and then transferred into the water within the heating system via a heat exchanger.