Compact Pressure Solar System 1.passed CE ,ISO9001:2000,CCC ... small order&OEM 4.exempt maintenance Compact Pressure Solar System:Pressurized tank, working pressure 6 bar, max ... Can reach at least 95 degreeCirculation Indirect /Closed loop (Active) Heating System Thermosyphon (Passive) Connection Type Direct-plug Absorption ... CE, ISO9001Warranty 5 years fashionable compact pressure solar system