... Compact Pressure Solar System 1.passed CE ,ISO9001:2000,CCC 2.high quality,elegant 3.small order&OEM 4.exempt maintenance Compact ... Pressure Solar System:Pressurized tank, working pressure 6 bar, max ... at least 95 degreeCirculation Indirect /Closed loop (Active) Heating System Thermosyphon (Passive) Connection Type Direct-plug Absorption Rate ≥0 ...