In order to solve the traditional solar/gas/electric hot water hot water supply instability, as well as gas leakage poisoning, electrocution and other safety hazards, as well as low energy utilization and to meet the family's multiple needs, ultra-low temperature inverter air-source heat pump technology, for us to create whole-house floor heating, air conditioning, hot water solutions. Using air as the heat source, it can efficiently produce heat at the extremely low temperature of -35°C. It adopts the method of water and electricity separation, without the risk of combustion and explosion, and the system runs more safely and stably. It can accurately control the water temperature, with a temperature difference fluctuation of less than 0.5°C, and realize 24-hour constant temperature circulating hot water.