Chimney installation

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LS551

New Member
Sep 2, 2025
3
Wisconsin
I have to install a chimney for a sauna build. I plan to use Class A pipe the whole way with a ceiling support box. I only have roughly 2 feet between the support box connection to the roof penetration. Heres my problem; I need to cut a rafter to make space for my chimney penetration, but im also extremely limited with where i can place the stove to meet clearance from the wall, and ultimately theres about a 3 inch difference between where the pipe attaches to the stove to where it needs to exit the roof. My only option for zero bend from stove to roof would be to cut two rafters which id really like to avoid for the structural integrity of my sauna.

So question is, is there a good way to offset a class A chimney pipe a specific distance like that. I know they make elbows but i believe they are fixed angles so i'm not sure how you'd control the distance it moves over. And if there is a simple solution, is it ok to try to make that move between the ceiling and roof or does it need to occur between stove and ceiling box?
 
2 feet is really close for a wood stove top clearance. Sounds too close. What does the stove mfg say?
 
Sorry, preferably what?
What I quoted, make the adjustment between the stove and ceiling, if you can meet clearances, etc...
 
Class A has 15 and 30º offsets possible. It will be tight. Look at the tables to make sure there is room. For example, two 30º, 6" elbows will provide a 4" offset with a rise of about 16" + 6" straight piece = 22" so measure carefully.

The alternative is to do the offset in the stove pipe where there is a lot more room and the piping is less bulky.
 
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