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"
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Rod Reidnauer
Class of Apr. 9-10, 2005
[color=green]Current Status [/color]Searching for land Thinking outside the vinyl sided box
[url=http://photobucket.com/albums/v328/titantornado/Log%20Home]My Log Home[/url]
http://www.magma.ca/~barkhm5/ecofan.htm
Here's one running in a video...
http://www.youtube.com/watch?v=B7F6Bq51Ucg
Interesting....
103 logs...1 month. Outside chinking, HVAC, plumbing, electric, gable board & batten finished :)
http://jandjloghome.blogspot.com/