Need opinion on installation options to get proper draft

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spenceuiuc

New Member
Nov 23, 2015
9
Colorado
I am in the process of remodeling a breezeway room and plan to add a wood burning stove in the SW corner of the room (see attached image). I have the stove nearly picked, and am now looking at my options for venting/chimney. The stove is looking like it will be an Englander 13-NC, roof is pretty mild pitch (somewhere in the 3/12 to 5/12 range- will verify), the elevation where I live is 5,000ft.

However, when I got up in the attic, I realized that I have 3 closely spaced trusses running E-W along the south wall of the room. This has created problems for running the stove pipe + chimney. So I am considering two options to run the stove pipe + chimney:

1. Chimney through ceiling, with offset stove pipe to the side + front of stove

With clearances and without cutting the engineered trusses, a chimney through the ceiling/roof would protrude through the ceiling offset to the side and front of the stove. I think it would not look ideal.

2. Chimney through the wall
See example photo (not actual). While still not ideal from an aesthetic perspective, I think this method is more pleasing than the offset stove pipe extending to the front of the stove. But, I am concerned about draft issues with two 90s in the installation.

Beyond the 10-2-3 rule, I have a few questions:
  • Does it matter if I use two 45s vs. two 90s to jog the stove pipe over the 10-20" to meet the chimney where it protrudes through the ceiling in Option 1?
  • Better to put the jog near the ceiling or near the stove?
  • For the through the wall Option 2, the chimney would go through the soffit- what have folks used to trim out clearance between the soffit and the chimney pipe?
  • Which option is preferred from a functionality/cleaning/draft standpoint?
  • Does the 15ft minimum chimney height have its bottom measured at the floor of the stove, or at a different elevation?
  • Should I be considering a taller chimney for a higher elevation area?
  • Any other particular issues to consider?
Thanks for all your help!
-Tony
Room.jpg Chimney options.jpg Jasons010.jpg
 
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45's are much less restrictive. So I would use those instead of 90s unless you decide to go out of the wall the obviously you will have a 90. The straighter the shot the better. When I did my install I ran into a situation simular to yours where I used 2 45's back to back which brought the pipe forward about 8 inches and allowed me to bypass the truss. I'm not sure if it matters where you put it but I put mine towards the top for looks. 15 ft is from the outlet of the stove normally
 
Do you know approximately how high the flue system will be from stove to cap? At 5000 ft it would be good to go a bit taller than the minimum 15ft that is specified for this stove to compensate for the higher altitude. For this reason I would not recommend going out the wall and then up. The 90 deg turns add resistance to draft. Also, note the R=2.0 hearth requirements for the stove unless it will be installed on a concrete slab.
 
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