... -Water Source Heat Pum -CE Certificate -High Efficiency&Muti-fuction LTWH Series High Quality Ground Source Heat Pump for Houses and ... valves, filter, thermostatic expansion valve, gas-liquid separator, high pressure switch and low pressure switch.The heat pump units ... LossKpa≤40Interface Dim.DN(mm)2525253232324040405050 LTWH Series High Quality Ground Source Heat Pump for Houses and Commerical Use