Works by using electronic growth valve to precisely Management the move of R290 refrigerant into your evaporator as well as a 4-way valve to divert the refrigerant circulation with the defrost operation Split Methods: Have one coil and lover within and 1 outside. Source and return ducts connect to the https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/