Most heat pumps can also run in the cooling mode wherever the cold refrigerant is moved with the indoor coils to cool the space air. Working with electrical energy, the pump compresses the liquid to extend its temperature. It then condenses back into a liquid to release its stored heat. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/