wood-coal stove wall clearance and heat shield use
I will build a small house over a basement with a coal-wood stove upstairs adjacent to an exterior wall, sharing a chimney with the basement featuring a second coal wood stove. My question stems from the need to economize on space in a small house (800 sf up and 800 sf down).
I may build frame or log. If frame I could build a standard chimney fireplace, with the brick and flues the only barrier against outdoors cold. This solves space problems with stove installation, since I can put the stove close to the fireplace or chimney without violating codes, I believe. If I build a log house, I do not want to cut an opening in the logs to accommodate a chimney, so the chimney would be enclosed within the log building, maybe with 1/2-inch separation space between the interior surface of the logs (or the stud wall in a frame house) and the hidden surface of the chimney, to accommodate building codes and for safety.
With either frame or logs, the stove will be a more efficient heating source if the chimney is enclosed within the building and not exposed to the exterior. So, I prefer that, if I can economize enough on space.
My question is what is the most space and code efficient way to set up a (small) stove on a brick base near to a brick chimney? I am trying to avoid using 6 or 7 feet of spacing from the wall to the front of a small stove. Of course, the stove will have stove pipe rising from its top to an elbow that then extends pipe into the brick chimney and flue. The brick chimney thickness would be whatever minimum passes codes, 15 or 16 inches maybe, as I seem to recall. The chimney width is not a space issue.
Also, is there a heat shield I could buy and attach to the rear of the stove to reduce the spacing legally required between the brick chimney wall (that in turn is adjacent to the frame or log wall)? I suppose the stove manufacturer sets specs re this issue, also, which is another complication.
Finally, is there a permissible way to build the chimney flush against the exterior wall, without 1/2-inch separation, or is that a code violation or fire hazard? The 1/2 inch doesn’t matter re spacing, but work in stabilizing and attaching the chimney across the space is a consideration.
Sorry about the length; just trying to be clear.
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