Building an oven at the manifold

[rst]

I was wondering if people with more awareness than me could give any input on this. 

I had simply intended to build a heated bench 8" RMH with 20ft piping run in it (and a few 90s) coming off of the one side of the J-tube/barrel assembly.  However, I have some floor space on the opposite side of where I intend to place the J-tube/barrel and was wondering if it would be possible to build a bread oven of sorts that would be heated by the gas coming out of the bottom of the barrel.  The gases would then loop back into the bench piping, which would then go back the other direction under the barrel.  So, the gas in the barrel would come out its side at the base, then go into an oven chamber (or otherwise an area that would heat an oven), then drop and go into the piping (the inlet being below the barrel outlet, essentially a 180 degree turn).   I figured this would potentially be serving the same purpose as the conventional manifold, but I don't know about what temperatures to even expect at that point, for one thing, or if there are any other factors that would be prohibitive, such as the more-or-less U-shaped downward turn in the manifold.  I'm not sure whether a metal box cobbed into the manifold area or a masonry box would be better, or if either one would work at all.

Any thoughts?

Thanks

[matthewwalker]

I think it would work from a gas flow standpoint, but the oven would be pretty mild in temp. I would guess it would normally ride around 200°F to 300°F, and would be surprised if you could get it much hotter than that if your barrel was a typical exposed radiator. If those kind of temps would work for what you hope to cook, I think you could make it work.