Central heating means that the steam or hot water generated by the central heat source can supply the heat needed for production, heating and living of a city (town) or part of the area through the pipe network. Central heating sources include cogeneration power plants, central boiler houses, industrial and other waste heat, geothermal, nuclear, solar energy, heat pumps, etc., or they can be multi-heat source combined heating systems composed of several heat sources. At present, the heating boiler with hot water or more. They are mainly concentrated in hotels, residential areas and large heating enterprises
