Adopts eco-friendly refrigerant to reduce ozone layer depletion. The system uses surface water, groundwater or soil as cold and heat sources for energy conversion. It eliminates the need for boiler rooms, avoids fuel combustion and flue gas pollution. Cooling operation requires no cooling towers, reducing noise and mold pollution. No waste residue, wastewater, waste gas or smoke is generated.

The available water temperature is generally 12~22°C in winter, which is higher than ambient air temperature. It raises the evaporation temperature of heat pump cycle and improves COP. In summer, the water temperature is usually 18~35°C, lower than ambient air temperature. It lowers the condensing temperature during cooling and enhances energy efficiency. The product has obtained national energy-saving product certification and been included in the government mandatory procurement list for energy-saving products.

If a distributed system is selected, a two-pipe system can realize the functions of a four-pipe system, meeting the independent demands for cooling, heating, hot water supply and ice storage in different areas.

Water temperature remains relatively stable all year round with far smaller fluctuation than air temperature. The stable water temperature ensures more steady and reliable operating conditions for heat pump units, and there is no defrosting trouble in winter.