Asking for advice on re-doing window stove pipe

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CT Treeman

New Member
Feb 25, 2024
18
Connecticut
Hi fellas,

With burning season almost upon us in the north east I am looking to redo what the contractor did when installing our stove. He opted to go through a basement window which we were fine with.

My concerns are that it lets heat out like crazy around the pipe. The old window frame is shot. Nothing is tight by any means. I would also like to install a fresh air intake to the right of it in the other window spot. All the wood nonsense I want to go. Some of it was already there and some was from when he supported the pipe and metal around it. All this is far enough from the stove based upon combustible clearances and the pipe as you can see is double wall.

Perhaps I am missing something with how close the pipe is to the wood framing and would like to hear that if it is the case.

My thoughts are that I can brick up the entire window opening and leave large enough openings to run the pipes through. Then mortar around the pipes to seal them in place and stop any other outside air flow.

I bought an outside air kit for the stove because of negative pressure in the house occasionally drawing smoke into the basement prior to a hot flue on start up.

Does anyone have any better ideas or suggestions for this?

[Hearth.com] Asking for advice on re-doing window stove pipe
 
If that is a proper thimble then it maintains the 2" clearance required for the class A pipe passthru. However, once it transitions to stove pipe the clearances change for the stove pipe. What is the whitish piece above this thimble? If that is wood it may be too close to the stove pipe connector. What is the distance from it to the stovepipe?
 
The white is some old window box trim piece that wad there from the previous owner they left upon i stall. It is 3 inches from the outside of the pipe. Its about the same distance from the 2x4 to the right. Good to know 2 inches is acceptable but still makes me lean towards removing all the wood and going to a different support structure not combustible.
 
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Stovepipe has different clearances. 18" for single-wall and 6-9" vertical clearances for double-wall depending on the brand.