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Solar Hot Water Vacuum Heater Experience?  RSS feed

Posts: 1113
Location: Mountains of Vermont, USDA Zone 3
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Has anyone used or known of the vacuum solar hot water heaters where there is a hot water tank at the top of an array of vacuum tubes with a non-freezing fluid like this picture?

I have the opportunity to get some on salvage.

Posts: 2679
Location: Phoenix, AZ (9b)
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I have no experience with it but I *think* this is the type of solar hot water heater geoff lawton is going to install at his Jordan site in the near future. Are there other variations of a vacuum tube solar water heater? He said something about the system being very affordable especially when compared to traditional "panel on the roof, tank in the house" solar water heaters.
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