posted 10 months ago
My first thought on seeing your sketch is that the angled flue through the wall is likely to draw water into the wall structure. I understand reducing bends, but think that risks a long-term problem. I would just run the flue straight out to the chimney, though that makes it difficult to clean the chimney from below, depending on ground level.
How inconvenient would it be to add a priming port to the base of the chimney so you can warm it if you find you need to?
Another possibility would be a small (4"?) bypass running up from the top of the bell to the ceiling and off to the chimney. Probably not the best look, but might be very useful.
How bad would it be to run the exhaust up from the end of the bench to the ceiling and straight out to the chimney?