The look of a heat pump has a substantial impact on its performance. Lots of air source heat pumps are created principally as air con units, largely to be used in summer temperatures. R290 can achieve high performance degrees that has a+++ Strength rankings across the Haier Heat Pump range. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/