Employs electronic expansion valve to exactly Management the flow of R290 refrigerant in to the evaporator as well as a four-way valve to divert the refrigerant movement for your defrost Procedure Break up Units: Have a person coil and lover inside of and a single outdoors. Provide and return ducts https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/