By using a GWP of only 3, R290 is the eco-friendly alternate to other refrigerants emphasising Haier’s motivation to creating answers for a far more sustainable foreseeable future. The refrigerant within an air-source heat pump absorbs heat within the out of doors air and turns into a gas via evaporation. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/