Product features:

The copper coil is inside of non pressure tank,the copper coil could bear the pressure by 0.7Mpa during its usage,

Direct heat exchange between tank water and coil water,which brings clean hot water

Inner tank:SUS304/0.5mm

Vacuum tube:QB-AL-SS/CU-58-1800(AL-SS/CU)Dia 58*1800mm

Outer tank:Galvanized steel/color steel

Copper coil:dia12mm,thickness 1.0mm