... exceeds 4.0 *Heating and DHW *Perfect design,Great system Air Source Heat Pump 8KW1. Heating, cooling and DHW function, adaptable ... coils and terminals, ideal replacement for water heater and air-conditioner.2. Use Environment-friendly refrigerant;3. Use bigger ... , water flow protection, high-temp protection, etc., and automatic defrost function, assuring the system to run safely and efficiently ...