Envirosun
Evacuated Tube Solar Hot Water System uses multiple tubes to heat water, which can reduce the energy needed to heat water. This system is similar to conventional solar hot water panels, but uses evacuated aluminum tubes in place of glass or plastic ones. The tubes are sealed together like an evacuated tube thermometer to hold heat while they're exposed to the sun and wind. Evacuated tubes also allow you to make various plumbing connections on the inside that would otherwise require drilling holes outside.
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