The design of the heat pump has a substantial effect on its effectiveness. A lot of air source heat pumps are built largely as air-con models, mostly to be used in summer months temperatures. It is more easy to incorporate greater radiators or underfloor heating for the heat pump while https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/