In a very dry process, this heat is circulated as heat air by way of ducts and vents. Air-to-air heat pumps can circulate either warm or chilly air. Making use of electric power, the pump compresses the liquid to extend its temperature. It then condenses back again into a liquid https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/