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Solar Hot Water Vacuum Heater Experience?

 
Posts: 1114
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?
Experiences?
Pros?
Cons?

I have the opportunity to get some on salvage.

http://www.alibaba.com/product-detail/Sun-energy-integrated-pressurized-solar-water_1086140882/showimage.html
 
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.
 
So you made a portal in time and started grabbing people. This tiny ad thinks that's rude:
Greenhouse of the Future package (documentary, plans, and ebook)
https://permies.com/wiki/137294/Greenhouse-Future-package-documentary-plans
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