I am installing a Fisher Grandma Bear with an 8" flue collar on top. Can I insert 8" (outside diameter) double-wall pipe (6" inside diameter) over this flue collar? If not, do I need 10" pipe (8" inside diameter)? Do I need any special connector or adapter between the pipe and flue collar? I would like to use double wall pipe all the way up. The total length of the chimney will be about 16 feet.
chimney install for Fisher Grandma Bear
- Thread starter Mpederson
- Start date
-
Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil. -
Super Cedar firestarters 30% discount Use code Hearth2024 Click here
![[Hearth.com] chimney install for Fisher Grandma Bear](https://www.hearth.com/talk/data/attachments/328/328472-b5b457a6e6de2804c07eb75b106326d1.jpg?hash=VNYNXF2OyX "[Hearth.com] chimney install for Fisher Grandma Bear")
Was planning on just sticking the double wall pipe directly over the flue collar in attached picture. 8" pipe (6" inside diameter) will fit over this pretty snug. However, it will be 6" chimney instead of 8" and the male end of the pip will be facing up.
No you can't do that. You at minimum need an 8 to 6 adapter but should really have 8" to match the outlet size. How tall will the chimney be? How will it be run and supported etc etc.
Chimney will be about 16' tall straight up through a metal shed with appropriate supports. I'm more concerned about the diameter of the double-wall pipe (8" or 6'" inside diameter) and how to connect to the stove with the flue collar shown in picture. Thanks for your continued help!
Ok so you will mount the 8" chimney pipe at the ceiling level with a support box and run that through the roof following all directions. Then connect from the stove to the chimney with connector pipe probably single wall for that old stove
I am planning on running the chimney pretty close to the exterior wall (metal siding with 2x4 horizontal wood bracing) so was thinking I would use double-wall pipe all the way up from the stove.
Ok you do know the stove needs 36" clearance to combustibles or proper ventilated shielding right? Also what is the building used for
This is a large open metal shed with some wood framing, concrete floor. Stove will only be used while I am in the shed, probably no more than a dozen times per year. I am planning on putting mason board behind the stove against the inside of the building. I'm more concerned about whether to use 6" or 8" (inside diameter) double-wall chimney.
Ok the cement board needs to be put on 1" spacers with a space at the bottom and top for ventilation. It should be 8" i actually find 7" works best but most manufacturers dont make 7". And what will the space be used for?
Space is used for storage of boats, snowmobiles, trailers, etc. and workshop. Lots of open space. I see you say pipe should be 8". I've seen other threads that suggest 6" (inside diameter) pipe is OK. What are the issues with using 6" instead of 8"?
Ok that makes it a garage and means by code you can't install a solid fuel burning appliance in that space in the usa.
Similar threads
