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Old 11-29-10, 09:36 AM   #14
Xringer
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Back in the late 70s, I saw an basement wood-stove installation that had a double-walled SS chimney.
Right above the stove, there were air holes punched in the outside wall.
Up about 5 feet, there were some matching exit air holes. (These were factory holes).

It worked using natural convection. And it worked very well.
The air was sucked into the bottom holes and came out the top, a lot hotter.
I think the air gap between the pipes was about 3/4 inch..

The homeowner was very happy with the performance of the scavenger..
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