● This model operates automatically to add water.

● Using thermosiphon system- Depending on the different density between hot water and cold water, a water flowing cycle is created in the solar geyser evacuated tube. Hot water flows antomatically upwards while the cold water flows down. The water in the solar water heater storage tank will be heated from this nautal circulation.

● Inner tank: Stainless steel SUS304-0.5mm

● Vacuum tube: 58/1800

● Outer tank: Painted steel -0.4mm

● Fame: Coated galvanized steel-1.5mm

● The material of insulation- Polyurethane

● Tank diameter: 375mm/475mm

● Thickness of insulation: 50mm

● Collector Angle: 45°
See more at: http://en.micoe.com/waterheater/Low-pressure-solar-water-heater.shtml