Stove pipe

[pacman]

If a stove has a opening of 6 inches out of the back. Should the stove pipe be 6 inches all the way to the chimney and or all the way up thru the roof?

 

[dwinch53]

If a stove has a opening of 6 inches out of the back. Should the stove pipe be 6 inches all the way to the chimney and or all the way up thru the roof?

pacman, each wood/coal furnace/stove is built to preform at top notch..keep the same size all the way...even larger is not the answer..you will mess with the draft that is needed to operate said wood furnace,stove...that's my 2 cents worth..DW

 

[carvinmark]

pacman, each wood/coal furnace/stove is built to preform at top notch..keep the same size all the way...even larger is not the answer..you will mess with the draft that is needed to operate said wood furnace,stove...that's my 2 cents worth..DW

:agree2:

 

[habanero]

pacman, each wood/coal furnace/stove is built to preform at top notch..keep the same size all the way...even larger is not the answer..you will mess with the draft that is needed to operate said wood furnace,stove...that's my 2 cents worth..DW

I agree as well. You might be able to get by within an inch of the outlet size, but it's usually bad news to change it.

 

[dwinch53]

If a stove has a opening of 6 inches out of the back. Should the stove pipe be 6 inches all the way to the chimney and or all the way up thru the roof?

pacman, what did you have in mind, are you going to install new or use a chimney that is present? tell us more...thanx, DW opcorn:

 

[mattmc2003]

My heater outlet is 6", and my pipe through the roof is 10", and it works great. Great draft.

 

[dwinch53]

My heater outlet is 6", and my pipe through the roof is 10", and it works great. Great draft.

I hope your interior dimension is 6 inch not 10 inch.. DW going thur the roof must be insulated and have air space which might be 10 inch...I have 6 inch ID and have 8 inch OD...this makea a diff. DW

 

[mattmc2003]

I hope your interior dimension is 6 inch not 10 inch.. DW going thur the roof must be insulated and have air space which might be 10 inch...I have 6 inch ID and have 8 inch OD...this makea a diff. DW

ID on the pipe through the roof is 10". It is the insulated pipe. Not sure of the OD. I had to have a custom 10"-6" adapter made. I closed off an old fireplace and placed a cabinet style heater in front of the hearth.

 

[dwinch53]

ID on the pipe through the roof is 10". It is the insulated pipe. Not sure of the OD. I had to have a custom 10"-6" adapter made. I closed off an old fireplace and placed a cabinet style heater in front of the hearth.

Good luck with that..watch that you don't build up tons of soot or creosote..In my state (mi) codes would make us reline the chimney with stainless the same size as the pipe leading into the chimney...enjoy the wood heat DW opcorn:

 

[mattmc2003]

Good luck with that..watch that you don't build up tons of soot or creosote..In my state (mi) codes would make us reline the chimney with stainless the same size as the pipe leading into the chimney...enjoy the wood heat DW opcorn:

Why would that be any more of a problem than any other size? I have awesome draft.

 

[dwinch53]

Why would that be any more of a problem than any other size? I have awesome draft.

mattmc...it just is not going to get all the smoke out of the chimney as quickly as the proper size all the way up...this will create circulation of exhaust within the larger chimney..loosing heat will create creosote..please, i am not telling you what to do just be careful of creosote and chimney fires.Over-Sized Flue. For wood stove venting systems, bigger is not better.
An excessively-large chimney flue requires more heat to keep warm, and cools more quickly than a properly-sized flue. Lower flue gas temperatures in large flues cause reduced draft, increased creosote buildup (since the smoke tends to cool and condense in the flue), and the potential for smoking problems, especially when the fire is not burning high. enjoy the wood heat DW

 

[danrclem]

My Fisher stove has an 8" outlet and I have it reduced down to 6". Seems to work well for me.

 

[Garfield]

depends on height

I read in some old book on the subject that the taller the stack the smaller pipe was needed. If I recall at somewhere around 30-35 feet a 6 inch pipe has the same draft as an 8 inch 12 foot pipe.

 

[KsWoodsMan]

If a stove has a opening of 6 inches out of the back. Should the stove pipe be 6 inches all the way to the chimney and or all the way up thru the roof?

It is what is recommended and stipulated to follow code in some areas. The operation of the stove depends on sufficient draft.

When I put mine in there was no 6" pipe available so I ended up reducing it from 6" at the stove to 4" for 6 feet then back to the 6" collar into the 8" brick chimney. It hasnt given me a moments trouble. The flue gasses move through the 4" fast enough that it doesnt lose as much heat and seems to warm the chimney quicker to establish a draft and maintain it.

I wouldnt do 4" to the top of the roof and expect any draft. I built a barrel stove a while back and did the first burn outside with 10 feet of 4" stack. It was bad about smoke spillage but being outside this wasn't a problem. When it was installed it was 6" flue for probably 15 feet. Only on occasion did he ever get any smoke back in the shop he was heating.

Does 4" work in a pinch ? Yes.
Will it pass code ? No

 

[habanero]

mattmc...it just is not going to get all the smoke out of the chimney as quickly as the proper size all the way up...this will create circulation of exhaust within the larger chimney..loosing heat will create creosote..please, i am not telling you what to do just be careful of creosote and chimney fires.Over-Sized Flue. For wood stove venting systems, bigger is not better.
An excessively-large chimney flue requires more heat to keep warm, and cools more quickly than a properly-sized flue. Lower flue gas temperatures in large flues cause reduced draft, increased creosote buildup (since the smoke tends to cool and condense in the flue), and the potential for smoking problems, especially when the fire is not burning high. enjoy the wood heat DW

Exactly right!

Chimney size/height is just like anything else, certain set-ups might work in certain situations and never cause a problem. But as a general rule, you're almost never going to go wrong if you follow manufacturer's instructions or codes.

 

[mtfallsmikey]

Most residential chimneys have 8" x 8" flue liners, using a 6" thimble at da wall.

 

[dwinch53]

Most residential chimneys have 8" x 8" flue liners, using a 6" thimble at da wall.

I believe you are right...But those are usually an older chimney and in those days it did not matter as much because there were very few air tight stoves and furnaces. The chimney stayed hotter and cleaner...now a day with the air tights it is a little harder to keep chimney temps up that is why folks need to follow codes for your area and if fire breakes out will your insurance co. pay if it was not installed by code....NO......Thanx...DW: givebeer:

 

[mtfallsmikey]

Yah, that IS older construction!...was having another 50+gezzer moment, please forgive me, and pass the Viagra please!

 

[dwinch53]

Yah, that IS older construction!...was having another 50+gezzer moment, please forgive me, and pass the Viagra please!

You are forgiven....we are just here having fun and no need to be sorry, I also have gezzer moments too. It is really neat to hear all others ideas and thoughts...that' how i learn...

 

[mattmc2003]

well, the fireplace was used a good bit before i got the house, and when i tore it out and looked up the pipe, it looked clean as a whistle. And the draft is great, and it is triple wall??? pipe, so once it got a good fire going how bad could it possibly cool off. It is about ten foot in length. And it never, ever puffs any smoke in the house. You can light your kindling and hold it in front of the heater door, and it will pull the smoke even from just outside the door. I seriously doubt i will have any problems.