Commercial heat pumps run safely and reliably all year round; HeatGreen Series perfectly combines eco-friendly R290 natural refrigerant and inverter heating technology to ensure optimal performance from -25°C to 43°C. It's worth mentioning that the unit can operate efficiently at -25°C, maintaining high COP, reliable stability, and strong heating capacity for 60°C hot water. More significantly, the maximum outlet water temp can be up to 75°C without electric heating to guarantee protection against legionella. With a wide operating range, HeatGreen is different from traditional installations. It can connect to solar water heating systems, various gas boiler water heating systems and electric water heating systems.