... pump:1. indoor unit included 4 way valve, liquid storage tank, pcb, heat exchanger, auxiliary heater, pressure gage, compressor inside ... rotary or scroll and heat exchanger (316 stainless steel brazing type, high-efficient S&C, high-efficient heat exchanger tube), ... , maximizing satisfy user's requirements and comfortable. MACON split type EVI DC inverter heat pump for cold area house heating ...