Our Evacuated Tube Solar Geyser is welcome in Africa. Evacuated Tube Solar Geyser uses the natural convection phenomenon called "Thermosiphon" in which the water is heated by the sun in the glass tubes. Cold water enters the hot water tank and runs through the glass tubes. The solar radiation is captured by the vacuum tube collector, the water inside vacuum tube is heated, hot water naturally rises and is stored in the tank, and cold water flows down creating a continuous circulation. The Evacuated Tube Solar Geyser operated by gravity, and must be installed in height to ensure water pressure.