Thu, 2008-04-17 17:45 — Shark
http://www.magma.ca/~barkhm5/ecofan.htm
Here's one running in a video...
http://www.youtube.com/watch?v=B7F6Bq51Ucg
Interesting....

Comments
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The fan looks very cool.
piker
Woodstove Fan
That looks identical to the ones they sell at Lehman's, but with nicer prices. Theirs run $120 - $148. Looks like a great deal.
Louanne
There are also Stirling
There are also Stirling engine powered woodstove fans available commercially too, which I believe may be a bit more powerful than the thermocouple models. (at significantly higher prices) Google "stirling woodstove fan"