... fuction LTWH Series High Quality Ground Source Heat Pump for Houses and Commerical UseHeat Pump System:Brifly Introduction: ... 2~ 1000m2 building. It can make free living hot water for demand as Villa, hotel, restaurant, factory, theater, stadium ... REFRIGERANT CIRCUITCopper tube connection with charge valves, filter, thermostatic expansion valve, gas-liquid separator, high pressure switch and low ...