Technical Specifications
Inner water tank are made of SUS304 2B food grade stainless steel plates,welded by argon arc.Water is pure and drinkable.Outer tank is made of color steel,or galvanized plate.

Heat insulation of water tanks adopts polyurethane foam,thickness is 55mm

Silicon rings to connect and seal them.

The tubes and supports are adjustable,power bearing is average,and can assure the vacuum tubes to use long time.

Whole glass vacuum tubes adopt super hard borax and silica glass
Absorb rate:=93%,thermal radiation rate:=6%(100?)

Resist 25mm hail,using life can last 15 years.
Temperature when exposed to sun without water:250'C,2.5hours to boiling if using single tube

If you use electrical appliances to aid heating,to switch off the power supple before bathing.

To test the water temperature before using,in order to avoid scalding.