EN12975vacuum tube solar water heater. 1)ISO9000,EN, CE. 2)lifetime.15years, guarantee 3years. 3)jinyi brand or OEM. This EN12975 vacuum tube solar water heater1)light-wiehgt, easy ... This demestic solar heater with electrical heater water solar heater,we are chinese manufacturing,the company has a fully fledged of ISO9001:2000 for solar water heaters, solar collectors ...