solar heater (1) vacuum-tube type (2) CE ,ISO ,SGS provided , 15 years life (3) Pressurized and non-pressurized We are a professional solar water heater manufacturer with ISO and CE certificate in Changzhou, China.Vacuum-tube solar heater1.Split pressurized solar system(1). Split pressurized system is consist of: solar collector, pressurized water tank, working station or controller. (pipeline ...