Uses electronic growth valve to exactly Manage the movement of R290 refrigerant to the evaporator in addition to a 4-way valve to divert the refrigerant movement for your defrost operation Break up Techniques: Have one coil and supporter inside and one outdoors. Supply and return ducts connect with the indoor https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/