1) Reliable and efficient; 2) Low Price; 3) Easy installation; 4) ... , stainless steel, 1.2~1.5mm9Circulation TypeDirect / Open Loop (Active)10Heating SystemThermosyphon (Passive)11Connection TypeDirect-Plug12InstallationFreestanding13CertificateSolar Keymark, CCC, SGS, CE, ISO900114UsageBathroom 100L solar water heater