Local weather performs a major purpose in choosing the most fitted air-source heat pump. Various heat pumps are meant to perform optimally in precise temperature ranges. The ECOMOD 290HT choice of monobloc air source heat pumps come in three chassis measurements and 5 outputs: 15kW, 18kW, 27kW, 40kW and 50kW. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/