... indoor unit included 4 way valve, liquid storage tank, pcb, heat exchanger, auxiliary heater, pressure gage, compressor inside the indoor unit ... brazing type, high-efficient S&C, high-efficient heat exchanger tube), small volume, high heat enchanger, up 10% than the same old ... s requirements and comfortable. MACON split type EVI DC inverter heat pump for cold area house heating and domestic hot waer ...