Pipe Size for Jotul Combifire No. 6

[LG Farm]

I got my hands on a Jotul Combifire No. 6 in nice shape that I would like to install in my pole barn. The smoke hole on the stove fits a 7" pipe. The owners manual indicates the "connector" to the chimney should be a 7" pipe, and the chimney should, at a minimum be 7" x 7" or a 7" circular pipe.

With this being in a pole barn, my "chimney" will come straight out of hte top of stove, so there will be no connector. With 8" pipe and fittings be much lesss expensive than 7", I'd like to use 8" pipe for as much of the chimney as possible, including the through-the-roof kit. Does anyone have a recommendation for how far I should take the 7" stove pipe before I put in an adapter to take the size to 8"? I could see where a 7" pipe will get warmer quicker than 8", so a few feet of 7" pipe could make sense.

Thanks,

 

[begreen]

What is the distance from stove top to the roof? How is the stove going to be tied into the chimney pipe without a connector?

8" is ok, but definitely use connector pipe up to the ceiling or cathedral roof chimney support. That's much less expensive than chimney pipe, even if it's double-walled connector. So is 7" single-wall.

 

[LG Farm]

Sorry, I probably confused things more than necessary. I do plan to use a single-wall pipe from the stove up to the cathedral roof chimney support. I'm trying to figure out how close to that roof box I should be when I put in the expander to go from 7" to 8" (single wall). If I understand correctly, the roof support box will transition from the 8" single wall pipe to the 8" double wall. The top of the stove is approximately 12' below the ceiling.

Thank you for the information.

 

[begreen]

The expander can attach directly to the start collar on the support box. Some already have the crimped connector on the bottom of the support box for this.