... *COP exceeds 4.0 *Reliable system,powerful control *CE Residential Air-source Heat Pump System1. Heating, cooling and DHW function ... coils and terminals, ideal replacement for water heater and air-conditioner.2. Use Environment-friendly refrigerant;3. Use ... , Emerson ALCO expansion valve, Siemens electric, etc., high quality and reliability5. Intelligent microprocessor control with heating curve inside, ...