... :PEF 30mm or glass mineral wool30mm (40g/cm3)8. Back PlateGalvanized plate, or aluminum plate, 0.5mm9.Surface Dimension(mm ... efficiency decay can be ignored , prolong life spanIntegrating frame with back board, sealed, reliable, beautiful and applicable Module is designable ... America ,Eastern Europe ,Southeast Asia, Mid East ,Western Europe. 2012 Newest Patented flat panel solar collector system