Inner tank: SUS 304
Inner tank thickness: 1.2mm
Outer tank: SUS 304
Outer tank thickness: 0.31
Insulation: Polyurethane imported from south korea
Insulation thickness: 50-65mm
Frame: SUS430
Frame thickness: 1.5mm
Pressure parameter: 0.6mpa
Conducting materials: Heat tube

Advantages: For the pressured operation, Got more rushed hot water while bathing. Even one vacuum tube broken, the whole system can go on working.