Indirect solar geysers also consist of one or more solar panels or evacuated tubes. Instead of pumping water into the panels directly as one would with a direct system, an anti-freeze substance circulates through the panels.
Once the liquid inside the panels is hot, it flows to the geyser system. The liquid then either circulates in a sleeve that is fitted over the geyser, or into copper pipes inside the geyser thus heating the water. The copper pipes are a less effective way of heating the water in the system because only a small volume of water comes into contact with the pipes at any given time. An indirect geyser system has a longer life span, because the anti-freeze is non-corrosive. It also retains heat longer and can’t freeze, even in the coldest conditions.
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