Non-Pressurized Evacuated Tube Solar Water Heaters
Our Non-Pressurized Evacuated Tube Solar Water Heaters are available in 100L (10 Tubes), 120L (12 Tubes), 150L (15 Tubes), 200L (20 Tubes) and 250L (25 Tubes) sizes. How they work: The vacuum tubes trap incident sun rays and convert these rays to heat inside the inner tube. When the water inside is heated, its density changes and hot water sections rise through the tube to the top of the tank, while cold water from the bottom of the tank replaces it in the tube, to start the cycle again. This natural cycling of water driven by temperature difference keeps water hot when stored in an insulated tank. The solar water heater tank is a non-pressurized tank with an opening to the ambient atmosphere. The solar water heater tank should always be filled with water to avoid damage.