2 pipes in one chase

[Mattd]

Our main floor fire place sits at a 45 degree in the corner, fully enclosed by the chase. Because the stove is rectangular in a triangular shaped chase, there’s a large triangular open spot behind the stove.

We are getting ready to finish our basement, and it would be nice to have a stove down there. Assuming there’s proper clearance, is it likely that we could pass the chimney pipe from the basement stove thru this gap? Would that pass code?

If possible it would prevent having to have an exposed exterior pipe. At the cost of reconfiguring the chimney cap.....Unless the lower stove can wye into the existing pipe. That would make it easier.

 

[jetsam]

You shouldn't put two solid fuel appliances on one flue (and I hope there's rules against it in most places).

The downstairs stove exhausting through the upstairs stove is a real hazard. It may not even be the kind of thing where the house fills up with smoke- the wind shifts, or the downstairs stove is raging and the upstairs one is on coals, and you have an invisible CO hazard in your house.

I imagine two flues in one chase is OK if clearances are all honored? The pros will be along to tell you about that... they'll want to know about the construction of the wall and the chase.

 

[kennyp2339]

I dont think you'll like the results, at the first floor pass through (so at the feet of the existing stove) the pipe needs to be class A which is the silver pipe you see coming out your roof, then factor in that when you have more then one flue in the same chase but appliances at different levels you can get smoke smell from reverse draft, example, you lite your existing stove, basement has negative pressure, the smoke coming out the first chimney gets sucked back into the basement chimney.

 

[bholler]

Yes 2 chimneys can absolutely be run through the same chase it's done all the time. Yes there is a potential that smoke can be drawn down another one but honestly it's pretty rare and if you terminate them at different heights it eliminates the issue