Air Source Heat Pump

Air Source Heat Pumps

Air source heat pumps use similar technology to that employed in domestic refrigerators or freezers. They are electrically powered appliances consisting of a compressor and a carefully matched evaporator coil and heat exchanger designed to provide space heating through water systems (either radiator or underfloor) by extracting heat from the outside air.
Air source heat pumps draw energy in the form of heat from the Heatking 8000 unitatmosphere, either from the outside air or from within the loft space of a building.

The refrigerant, which has a boiling point of about -40°C, evaporates in the evaporator coil and this then extracts heat from the outside air which is blown over the evaporator coil by a fan. As the gas in the evaporator coil is so cold it will absorb heat from the ambient air at temperatures down to -15°C. The refrigerant gas then passes into the compressor which adds more heat energy and raises the temperature to around 75°C. This then passes into the condensing heat exchanger and as the refrigerant cools and condenses it passes heat energy into the water which is used to heat the radiators or underfloor heating pipes in the house.

Typically the heat passed into the house will be 3 to 4 times the energy used by the compressor and fan, so most of the heat supplied is renewable.

ASHP Schematic

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"We are delighted with the microgeneration heating system Microgeneration. It's quite novel - two solar panels and an air-source heat pump all feeding a thermal store which heats both our water and our radiators."

Anne and Colin B., Surrey