Wayne, how cool is that!? Ecofan Airplus Heat-Powered Fan for Wood Stoves, Model# 802CA-KBX | Blowers + Fans | Northern Tool + Equipment
Just had a thought. (yea, I know, lol) A red-neck radiator pump thing. Touch some fluid filled copper tubbing to a hot part of the heater coil to turn a impeller to drive a fan in a closed but vented loop system with a reservoir? Sort of a steam engine with out steam. Not really all that "Rube Goldberg" as it would be cheap an' easy.
Make the oven out of a gutted refrigerator. hmmmm
I should really start another thread. Sorry about the way OT Smoothe.