... Keymarket ,CE,ISO9001,CCC,certificates 2.capacity100-500L 3.vaccum tube work over 15 years split solar heater system: 1. that ... CE,ISO9001,CCC, certificates, completely guarantee high quality,2. each tube inside have copper pipe for exchange hot,high efficient,keep ... together complete autumatic, and can work in bad weather(-30), if one tube is broken, still can work, no leak,4. collector ...