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Solar Air Furnace
Submitted by Jesse Hunter on July 2, 2008 - 10:28pm.
http://www.youtube.com/watch?v=bRZvAAqzXIw
http://www.cansolair.com/
http://www.thesolarstore.com/index.php?p=systems&sum=sola
very interesting
Wow, I think I just might buy one or two of these for my house. They sell a larger one with a small PV panel to power a fan which could provide heat even if the grid goes down.