Evacuated Collector Tubes

In a solar water heater system, special coatings on the evacuated collector tubes are activated when exposed to sunlight, causing the collector temperature to reach upwards of 300 degrees. A water-glycol solution is circulated through the collectors, which transfers the heat into a built-in heat exchanger in the water tank, heating the water. A typical solar water heating system can provide hot water for a family of 4-6 people with larger and smaller systems available. Solar water heaters are also used in a wide range of commercial applications such as laundries, hospitals, dormitories, and various manufacturing processes.