Manufacture, sales, assembly and services for solar water heater, Air-source water heater;Famous Brand in China,ISO14000,ISO9001 Hongxi Series ... and healthy water is ensured.Stable and Eternal temperatureAdopting polyurethane insulation layer of high-obdurate rate, with thermal conductivity ... of sunlight, so that maximum efficiency of solar water heater is achieved. solar water heater hx24