Quadrafire 3100 install clearances

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HighHeat22

Member
Sep 29, 2011
147
southern michigan
New install on a Quadrafire 3100 Millennium and have questions on stove clearances. Spec sheet says 17" to 6" single wall pipe and 8.5" on stove corners on a corner install. I'm going to go with 18" to stove pipe thats standard. I put up walls 1" away from drywall with 1/2" cement board and porcelain tile. I have several questions. Is the 18" clearance to the back drywall or the non-combustible walls I put up and is the corner clearance of 8.5"to the drywall or the non-combustible walls. I forgot to mention I have a 1.5" gap at the bottom of the walls and the same cement board and porcelain tile on the floor. Also have back and bottom shields on the stove. Install is a thru the ceiling and then thru the roof. I can't get a straight pipe thru the rafters the stove sits below in the middle of the rafters so I'm going to use an elbow to go thru the ceiling 4 inches over. I hate this and would really prefer a straight shot thru the ceiling and roof. My last stove I had to move the pipe 4" over thru the ceiling/roof and I never had a great draft and it was always a pain to clean the pipe. Any one else have this problem. I appreciate any help on this.
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
25,514
central pa
Clearance is to combustible material so the drywall.

You could always move the framing we do it pretty often
 

begreen

Mooderator
Staff member
Nov 18, 2005
89,584
South Puget Sound, WA
An offset when done with 45º elbows, does not present a huge restriction, Using 90s to create the offset would be worse. We have a 45s offset and our system drafts well. How tall is the flue system in total from stovetop to chimney cap?

Is there a reason that double-wall stovepipe is not being used. That too will help improve draft and is a higher quality pipe.
 

HighHeat22

Member
Sep 29, 2011
147
southern michigan
Yes using 45 elbows. About 15ft chimney. My last chimney that I used 45 elbows on was about e30ft and yes it did reduce the draft. So on this one I should be fine. I'm really looking for answers on my clearances so I can finish the install. Not sure if I can measure my clearances from the drywall or the tile I put up. Thanks for your reply.
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
25,514
central pa
Yes using 45 elbows. About 15ft chimney. My last chimney that I used 45 elbows on was about e30ft and yes it did reduce the draft. So on this one I should be fine. I'm really looking for answers on my clearances so I can finish the install. Not sure if I can measure my clearances from the drywall or the tile I put up. Thanks for your reply.
As I said before the clearances are to combustibles. The nearest combustible would be the drywall