1.The air source heat pump needs to be located outside in the open air
and uses a fan to draw air into it.
2.This air then flows over a plate heat exchanger, which contains a refrigerant liquid.
3.An evaporator uses the latent heat from the air to heat the refrigerant liquid sufficiently until it boils and turns to a gas.
4.This gas is then compressed by a compressor, which causes it to significantly increase in temperature.
5.An additional plate heat exchanger then removes the heat from the refrigerant (turning it back to a liquid), which can then be used as useful heat.
6.The cycle then begins again (back to 2)