1,with refrigerant connection between indoor and outdoor unit

 2,With Electronic Expansion Valve ²     

 3,Famous brand water pump inside ² 

 4,Wide working temperature range, down to -20 °C ² 

 5,Matsushita inverter compressor ²    

 6.COP is up to 4.57 ²      

 7,Compressor crank heater and bottom plate heater for low ambient usage