... Users can use it to supply sanitary hot water, heating house in winter and cooling house in summer. ... as fan coil and air handling unit, or underfloor heating system. 1.How does a heat pump work? ... it to supply sanitary hot water or/and heating house,house heating and house cooling.4. High COP:1) ... from-20C to 40 C, increased20% when-10 Cheating capacity.4) Safe and no pollution: Water and electricity ...