... is available,Cop above 6.0 -6.5 Stars ground source heat pumpheat pump cooling capacity:25kw--3400kwR22,R407c,R134a is ... water to exchange energy, the water- to- water heat pump is heating and air conditioning system is environment ... ,no pollution3.The unit can be used to supply heat, refrigerate and supply hot water for daily use. ... all controlled and monitored in long-distance ground source heat pump