Heat pumps are machines that extract heat from one place, bring it to a higher temperature and move it to another place. Heat pumps work by circulating refrigerant liquids between two heat exchanger’s with a compressor pump.
The most common everyday items that use heat pump technology are fridges and freezers. Warm air is extracted from inside these appliances and vented outward.
Heat pumps are also used for home heating. They extract heat from a heat source but instead of releasing it into the air, like fridges and freezers, they put it into water that circulates through radiators or under-floor heating.