... fuction LTWH Series High Quality Ground Source Heat Pump for Houses and Commerical UseHeat Pump System:Brifly Introduction:APPLICATIONUsed ... 2~ 1000m2 building. It can make free living hot water for demand as Villa, hotel, restaurant, factory, theater, stadium, ... .23.54.04.54.86.1Control SystemDedicated heat pump controller,PID regulatorSecurityOverload, high voltage, wrong Phase, water, oil, antifreeze ...