Woodstove question

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Pitchpine

New Member
Sep 10, 2026
2
NC
I have a prefab wood burning fireplace a tractor and trailer couldn’t haul the wood I’ve burned in this thru the years. Has an 11” inside diameter pipe that is double walled runs straight up 25’ out of the ceiling. Fireplace is rock on 4 sides in middle of room, it’s 6’ x 3’ and there is at least 2’ of space on any side of prefab chimney double walled pipe inside the rock area where pipe runs up. I’m wanting to put a woodstove in front of fireplace sitting on the hearth which is more than big enough for a woodstove stove to sit. The stove I’m wanting to install uses 6” pipe for flu. So question is can I use 6” insulated stainless steel flu pipe inside the 11” to use for my woodstove? So it would be 25’ of insulated flexible 6” flu pipe connecting to a “T” off the back of the stove to connect to pipe. The stove is a Jøtul 602. Is there any reason this wouldn’t work and be safe.
 
As described, this should work out ok, as long as all other requirements for the stove are honored. This include the required hearth protection and proper clearances from combustibles.

Note that this stove is an easy breather. A 25' liner may draft strongly. If so, a key damper may be needed to tame the draft.
 
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As described, this should work out ok, as long as all other requirements for the stove are honored. This include the required hearth protection and proper clearances from combustibles.

Note that this stove is an easy breather. A 25' liner may draft strongly. If so, a key damper may be needed to tame the draft.
I also have been told I wouldn’t need the 25’ 6” pipe. From 6” tee off back of stove to 6” pipe maybe 4-6’ long then just let it draft up existing pipe. So the 4-6’ piece is inside the 11” pipe. Put a plate where 6” meets the 11” so you only have a 6” hole there. I thought that option might be best it would be really simple to keep my 11” pipe clean and inspected. Any thoughts on this option?
 
I also have been told I wouldn’t need the 25’ 6” pipe. From 6” tee off back of stove to 6” pipe maybe 4-6’ long then just let it draft up existing pipe. So the 4-6’ piece is inside the 11” pipe. Put a plate where 6” meets the 11” so you only have a 6” hole there. I thought that option might be best it would be really simple to keep my 11” pipe clean and inspected. Any thoughts on this option?
Absolutely not an option. One the pipe is extremely oversized. 2 it is most likely not an ht chimney meant for use with a wood stove. So not rated for high enough temp
 
Yes, get it cleaned for sure, but definitely no to using it for the woodstove chimney. It needs the 6" liner to go all the way up.

Technically, if this is an older Jotul 602, a 5" liner is acceptable. The factory flue collar is 125mm.