The design of the heat pump has a substantial influence on its efficiency. Quite a few air source heat pumps are designed principally as air-con units, predominantly for use in summertime temperatures. It is a lot more simple to incorporate bigger radiators or underfloor heating for just a heat pump https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/