Non-pressure Solar Water Heater For Flat Roof59
Specification:1. Inner tank: 0.5mm food grade stainless steel 304-2BOuter tank: 0.4mm stainless steel 304-2B/304-BA2. Insulation: 55mm CFC-free polyurethane3. Supporting Frame: 1.2mm stainless steel4. Vacuum tube: ALN/ALN Absorber, Borosilicate glass 3.3, thickness 1.6mm, hail resistant 25mm.5. Fram