vacuum tube solar water heater

Descripción del producto

1. Inner water tank shell is made of SUS***2B food grade stainless steel plates, welded by argon arc. Water is pure and drinkable
2. Out water tank shell is made of SUS**4 2B or SUS**4BA
3. Heat insulation of water tanks adopts polyurethane foam and the thickness is *0mm
4. Silicon rings to connect and seal them, leak testing before make insulation
5. The tubes and supports are adjustable. The power bearing is average and can assure the vacuum tubes to use for a long time
6.  Whole glass vacuum tubes adopt super hard borax and silica glass
7. Absorption rate: =*3%, thermal radiation rate: =6%
8. It resists *5mm hail and the using life can last *5 years
9. Temperature when exposed to sun without water: **0oC,2.5 hours to boiling point if using single tube
10.  If you use electrical appliances to aid heating and to switch off the power supple before bathing