... passed CE, Solar keymark (EN12975, EN12976), SRCC, CSA,SABS approval.5. If you want to bring solar solutions to water heating ... : 1800mmGlass thickness: 1.6mmAbsorbptance: 92%-96%(AM1.5)Emittance: 4%-6%(80°C±5°C)Heat loss: 0.4-0.6W /(m2 ... -AL coating (or ALN/Ti-ALN/Cu coating)Vacuum tightness : P<5×10-3PaManifold tankInner tank: SUS304-2B [0.4mm-0.5mm ...