Air source heat pumps (ASHPs) is a sustainable alternative to fossil fuels. The ASHP’s absorb heat from the outside air to heat your home and hot water. They can still extract heat when air temperatures are as low as -15°C.
The pump uses a vapour compression cycle. The heat pump draws air in and transfers it over an evaporator where R32 refrigerant is exposed to this air. The liquid refrigerant, which has a low boiling point, boils off to a gas and absorbs the latent heat energy within the air. The gas is then compressed which increases the heat content in the refrigerant before passing through a heat exchanger. Here, the gas condenses back to a liquid while transferring the heat to the water of the heating system. The liquid refrigerant is then re-circulated through the evaporator and the cycle is repeated.