Compact Non-Druck Solarwarmwasserbereiter

Specifications 1. Inner and outer tanksshell are all made of SUS3042B food grade stainless steel plates welded by argon arc.Water is pure and drinkable. 2.Heat insulation of water tanks adopts polyurethane foam,thickness is 55mm. 3.Silicon rings to connect and seal them.. 4.The tubes and supports are adjustable,power bearing is averaga,and can assure the vacuum tubes to last for long time... 5.Whole glass vacuum tubes adopt super hard borax and silica glass. 6.Absorbing rate=93%,thermal radiation rate=6%(100). .8.Temperature when exposed to sun without water:250,2.5hours to boiling if using single tube. 9.If you use electrical appliances to aid heating,to swith off the power supply before bathing.