Solar Batch Heaters
Solar Batch Heaters, also known as ICS or Integral collector-storage systems are one of the simplest solar water heaters. They can also be one of the cheapest solar hot water systems.
Batch water heaters are made of one or more black tanks or tubes in an insulated glazed box. A “glazed” box is simply a box with a glass or plastic cover or window that allows the suns rays into the box.
Cold water first passes through the batch solar heater, which preheats the water and then continues to the regular home water tank or heater. In this way if the sun is not shining the normal water heater can provide the necessary hot water.
Batch systems, or ICS systems are simple, reliable solar water heaters. However, they should be installed only in climates with mild freezing because the collectors itself or the outdoor pipes could freeze in severely cold weather. Some recent work indicates that the problem with freezing pipes can be overcome in some cases by using freeze-tolerant piping with a freeze-protection method.
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