... tankStainless steel(SUS304 2B), Φ 360mm6Outer tankGalvanized steel, Φ 460mm7Insulation High-density polyurethane foam8BracketGalvanized steel, aluminum alloy steel, stainless steel, 1.2~1.5mm9Circulation ... SystemThermosyphon (Passive)11Connection TypeDirect-Plug12InstallationFreestanding13CertificateSolar Keymark, CCC, SGS, CE, ISO900114UsageBathroom high quality solar water heater