... Water Heat Pump *3.5~28KW,DHW,heating,cooling *High COP, reliable system,good reputation *CE&RoHS Multifunctional Air to Water Heat PumpThis series of heat ... hot water to warm house in winter, supply cold water to cool the house in summer, and provide sanitary water for ... . Use Eco-friendly refrigerant R410A2. Use bigger heat exchanger than normal one, with higher efficiency3. Use world-known brand ...