Attached pic looks like a cinder blocks. It goes down to the basement where it vents hot air from the oil burning system. We want to switch to a wood stove system. Chimney liners wont fit down this correct? It looks like stacked cinder blocks which have two holes in them a piece correct? So this would not have the correct space for a 6" chimney liner? Just thought I 'd ask you guys, I dont have much knowledge with this thnx
Hello all, Cinder block chimney?
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show us a pic of the place where the furnace enters that chimney. Then pull the pipe out and take a pic of the inside
CenterTree
Minister of Fire
Those "look" like concrete blocks??? Never saw cinder blocks laid in that manner.
But then again, if they are concrete I still can't figure out that stacking
Someone else should know though.
What type/size of flue for the oil is in there now?
But then again, if they are concrete I still can't figure out that stacking
Someone else should know though. What type/size of flue for the oil is in there now?
electrathon
Minister of Fire
Looks like structural support for the house, not a chimney. Cinder blocks are stacked like that, leaving no inner hole, but four holes through the stacked blocks.
k, Just took pipe off in the basement from the oil forced hot air system. There is an interior clay chimney whatever u call it inside. So it looks like a hole down the center of those cement blocks as the chimney. Originally they looked like cement cinder blocks to me. But there is one 6 -7" square hole going down thru. So now I have to find out what size chimney liner to put & if only a 4-5 inch liner can be installed is that safe for a wood stove exhausting from a 6 inch pipe? Prob not right? Also wondering if a wood stove can just exhaust into it as is, or is that a fire hazard. Thank you guys for chiming in or chimneying in i should say haha :D
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MaintenanceMan
Minister of Fire
3 floor old house & basement, like 50-60ft from basement? Estimating. The first FL would have the stove 30ft+ to roof. I measured the inside of that clay interior chimney 6 inches max. So would take maybe a 5 inch liner? If a liner is definitely needed. Pretty tight budget here. Thnx
Been reading a lot on this. So I have my answers. I guess I'd have to run the stove into the existing chimney or run a new pipe chimney. Liner will be too small for 6inch clay flue. Thanks for responses all
kennyp2339
Minister of Fire
I new metal chimney would probably be best, plus you will be able to create a spot for your appliance and have a dedicated system with its own clean out.
ya, Would be nice to use the existing chimney. I was told to contact csia.org to get a local chimney inspector over. I heard its a big deal to get rid of the existing clay liner 3 floors of removal. Also the existing chimney was used to exhaust the oil forced hot air system not smoke from a wood stove stove. I'd like to use it w/o a liner as is. I wonder how likely is a chimney fire using it w/o a liner IF the chimney is cleaned every summer. IF there r existing cracks in the interior build how much would that contribute to a chimney fire if chimney was cleaned & used corectly
Have inspected it may be fine to use as is. Does the chimney have the required 2" of air space around it the entire way up? If not you should really install an insulated liner to bring it up to code and reduce the chance of fire spreading to the house in event of a chimney fire. And no it really is not that big of a deal to take out the old liners
Not sure about the 2 inches, the clay liner looks tight in there. Good to know tho ty great info
No you need 2" from the outside of the masonry structure to any combustible material
Oh sry, Around the chimney" I'll definitely check. Whats the usual cost or could I remove the interior clay pieces?
There is no usual cost it is dependent on many variables and no it is not a very diy friendly project. In your case i would say it would probably be between 3 and 6 hundred but i cant say without seeing it
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