Fire Place Chimney pipe

[ColchesterCabin]

I am coming to an end soon on my own project for this year. But after reading Al's thread it left some unanswered questions for me I thought I would raise here... Simple physics tells us that a chimney that runs vertical througha warm space then exits the roof with little pipe(so to speak of) to the chimney cap darws better then a chimney with a bunch of lbows.

The problem I have is like Lemay's build I have two lofts connected by a bridgeway upstairs. I would have loved to run the pipe in the stairwell opening but clearences are too close. I don't want to exit at the eaves as I would have too much chimeny above the roof line to support and we get a lot of snow up here. The only option I have is to run out the side wall of the cabin and up towards the peak on the exterior.  I would love to run the pipe up through the loft and out the roof line but again how can I make this work without burning the crap out of everything and everybody who goes near it? Or will I have to go through the outside wall?

[Redoverfarm]

There are insulated 2 & 3 layer pipes which have a very close clearences.  They are costly but sometimes we have to pay for what we actually want. 

Something along these lines.  They are saying minimum of 2".  Might be worth checking into at  http://www.ventingpipe.com/metalbest-6ut-36-ultra-temp-6-x-36-class-a-chimney-pipe-length/p1068920

http://www.ventingpipe.com/mediabase/specifications/duraplus10.pdf

[MountainDon]

I'm with John on the insulated pipe. It is not just for running outside. It makes it possible to hide pipe behind walls and in relative close proximity to where people may accidentally touch it. The way they bayonet together and have a locking band that clamps over the joint makes them nice and secure. I'm partial to the Selkirk brand but that's because they started out in my old home town and it was the first brand I ever used. They have all worked well.

In addition long runs of uninsulated black pipe can cool the stove exhaust too much. Some stove manufacturers will list maximum lengths of black pipe and a minimum overall length for good drafts. My VC lists both.

I've noticed that the black pipe section of the chimney in our cabin creosotes up more than the insulated pipe section. The lengths are about equal. I get about twice the volume of sweepings from the lower single wall black section than I do from the upper insulated section, even though the insulated length is outside and in the unheated attic space.

[UK4X4]

I'm at the planning stage too - I was going to run outside the cabin but am now tending to lean to installing inside with either double or triple wall

either way I was going to vent the upper insulated boxing to upstairs to get some heat transfer.

Black pipe up inside false ingle nook- then insulated up through the second floor and roof

[Dave Sparks]

Not to mention if something goes really wrong, multi layer pipe may give you more warning or more time before you let the smoke out.