How do evacuated tubes work? [Video]

This is a demo unit of a solar thermal evacuated tube collector. I explain what it is and how it works in this video. The solar evacuated tube collector is designed .\r
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Sunmaxx 30 evacuated tube heat pipe with butler heat dump and butler wand. This system provides about 90% of our hot water needs. Solar thermal energy .\r
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Solar Evacuated DIY solar tubes. This is part 2 of the Solar Tubes with a control bottle and sun exposure. My website link for the results and videos are .