How does it work?
Air-source heat pumps often used in moderate climates, use the difference between outdoor air temperatures and indoor air temperatures to cool and heat your home.
Although none of theair/water heat pumpsthat are available on the market can cover the heating requirements all year round, this type of heat pump does offer economic benefits, an air/water heat pump in combination with an immersion heater, the heat pump should cover heating by itself and the immersion heater is only activated during extreme peak periods.
How does air-source heat pump work?
ASHPs supply more energy than they consume. By extracting heat from the surrounding air, the heat energy released can be up to 4 times the energy required to power the equipment.
An ASHP system consists of a compressor and a carefully matched evaporator coil and heat exchanger. A refrigerant liquid which circulates within the system has a boiling point as low as minus 40˚C and evaporates when absorbing heat from the outside air. It is possible to extract considerable heat from the air at temperatures as low as minus 15˚C. The resulting refrigerant gas is then compressed adding more heat energy and raising its temperature to around 75˚C. This heat is then passed via the heat exchanger into water and used to provide space heating through radiators as for conventional heating systems, or via underfloor heating systems.
