non-pressure solar water heater

non-pressure solar water heater features as follows:             

1) stable and reliable performance with well anti-wind

2) vacuum collectors tube with alluminum &steel & copper  coating (three layers)  

high-degree light absorbption.

4)dual angle brackets with the flat  or inclined roof

5) economical popular products

6)best choice for the medium income family

7)frame material : stainless steel

8)inner tank material: with sus304/2B food grade stainless steel

9)shell tank material :stainless steel

10)thermal insulation material :50mm foaming  polyurethene

11) optional electric heater booster :220v 1.5kwt