Chimney Pipe question...

[Hammy]

Okay, I think I know the answer just by logic but I want to make sure and I can't seem to find the answer and the local stove shops are closed.

I am in the process of installing a direct vent LP fireplace and a wood burning stove. The venting pipe for both stoves will be running up the same interior chase and then terminate out of a chase I framed up on top of the roof. I had a custom chase cap made to accommodate both vent pipes. They will be separated by about 12-18" (side by side). Both are vertical runs.

My question is, which one should terminate the highest or does it matter? I figured the direct vent cap should be lower then the wood stove cap so if they are both going at the same time, it wouldn't be sucking in smoke from the wood stove venting.

What do you all think or know about this?

 

[Western]

Sounds like you have a good plan, I wander if the wood ash could be a problem in the gas vent though, probably not a concern but worth considering,

 

[mbohuntr]

I'm wondering if the wood chinmey would allow in carbon monoxide from the gas chimney???

 

[studor]

Should not matter -- if you get downdrafting in either chimney it is a problem but I somehow doubt you will. Will both devices have outside combustion air? I dont see how either device would be able to get gases back into the living space if both are drafting properly

 

[scott_vt]

12-18" (side by side). Both are vertical runs.

My question is, which one should terminate the highest or does it matter? I figured the direct vent cap should be lower then the wood stove cap so if they are both going at the same time, it wouldn't be sucking in smoke from the wood stove venting.

What do you all think or know about this?

Good Mornin Hammy,
I use the same chimney, two seperate flues, for both my woodstove and my gas insert, which is in my first floor fireplace. The gas insert vents through a 4" pipe to the top of the flue and has a wire mesh and cap on top of it. The other flue goes from the basement where the woodstove is and exits right next to the vent for the gas insert. I have had this arrangement for about 10 years or so and have never had any problem at all with downdrafts or such !

IMO a few inches in elevation of either flue or appliance pipe exiting a flue will make no appreciable difference in operation of either appliance !

 

[Hammy]

Thanks guys!

Scott_vt, our set up sounds very similar.

Craig

 

[scott_vt]

Thanks guys!

Scott_vt, our set up sounds very similar.

Craig

Good Evenin Craig,
I just thought I would mention one other thing. The flue that I use for the wood stove, does not have a cap on it. It may disperse the smoke more freely, but it probably makes little difference. The wood stove flue is 8" x 12" and the other flue is 12" x 12" but it does have the internal pipe for the gas stove !