Air source technology used in the central water heater is the world's new energy-saving technology concern, is currently the world after coal, oil-fired boiler, electric water heaters, gas water heaters, solar water heaters after the generation of energy saving devices; air source central water heater is Using the principle of reverse Carnot cycle heat pump, through the refrigerant absorbs heat with the outside air temperature, the compressor compressing the refrigerant heating and heat transfer of water such as the continuing process to a large number of low-grade heat source (heat in the air) through the compressor and the refrigerant, changing the availability of high-grade heat, bring water to get hot water heating system; air-source heat pump water heating technology, since the 90s of last century developed in Europe and America and other developed countries, there have been Europe and America Governments of developed countries attach great importance to and vigorously promoted in the United States, Australia, Sweden and other developed countries have universal application, widely used in homes, schools, hotels, hospitals, beauty salons, bath center, swimming pool, and factories require a lot of focus on use of heat water sites.

Water heaters currently on the market according to their different use of energy including gas water heaters, electric water heater (divided into the thermal and displacement) and three main types of solar water heaters, water heaters, compared with the traditional air source central water heater has a unique advantage.