Creosote build-up on new wood stove

[bogydave]

Temperature down to 400f. Im only heating 600sq ft, 300 sq ft is closed off for now.

the following pic depicts the defective red wood and what i called birch. might be cottonwood or something.

Definitely birch. Easy to get a fire going eh? bark is the best nature made kindling
Looks like the birch here:


If the cedar is all roughly that size,
be like burning kindling, burn hot & fast.

Should get hot & clean the pipes though.
Have read about over fires, not sure if small pieces cause it or not.
Not reason for severe creosote problems unless it's wet & burned slow.

 

[Beetle-Kill]

2f



2ft vs 3ft is same price but what is advantage of a longer chimney? thanks.

2-vs.-3 , better draft. Better draft equates to better scavanging of the spent flue gasses. More velocity of those gasses should mean less time in the flue to build up creosote. Hence, longer flue= hotter temps. of gas before it exits the flue.
Just my take, I may be wrong.

 

[cliff88]

(broken link removed to http://www.chimneysweeponline.com/howetwd2.htm)

i think it is 6th question

 

[cliff88]

2-vs.-3 , better draft. Better draft equates to better scavanging of the spent flue gasses. More velocity of those gasses should mean less time in the flue to build up creosote. Hence, longer flue= hotter temps. of gas before it exits the flue.
Just my take, I may be wrong.

thanks. good stuff.

 

[cliff88]

View attachment 86812

Definitely birch. Easy to get a fire going eh? bark is the best nature made kindling
Looks like the birch here:
View attachment 86813

If the cedar is all roughly that size,
be like burning kindling, burn hot & fast.

Should get hot & clean the pipes though.
Have read about over fires, not sure if small pieces cause it or not.
Not reason for severe creosote problems unless it's wet & burned slow.

Thanks for the pic

 

[begreen]

With the 30NC in a 600ft space in a milder climate, I think you have about 4X too much stove with a short chimney. This combo is bad enough. The cedar if wet is just adding insult to injury. Open up that additional space and some windows if you want to use this stove. Let it run hot enough to get the stove and flue temps up or get a smaller stove.

 

[corey21]

Your chimney is not high enough and i think you have to big of a stove for that place.

 

[remkel]

2f



2ft vs 3ft is same price but what is advantage of a longer chimney? thanks.

Longer chimney=more draft through the stove.

 

[cliff88]

With the 30NC in a 600ft space in a milder climate, I think you have about 4X too much stove with a short chimney. This combo is bad enough. The cedar if wet is just adding insult to injury. Open up that additional space and some windows if you want to use this stove. Let it run hot enough to get the stove and flue temps up or get a smaller stove.

I switched to seasoned birch and I have clean window vs window dripping with creosote with the cedar. I realize chimney isnt protruding enough but
what would the ideal total length of a straightup chimney be? Mine is presently 14ft and i was planning to add 2 more feet? Also, what is the minimum
desired temp of the stove top and chimney.(to combat creosote) With 3 pieces of wood, my stove top near chimney pipe with no air is about 350F.
Thanks.

 

[mywaynow]

Stove top should be 500+ for the peak of the burn. To maintain 350 you are going to have to burn many smaller fires. I would say any pipe that is under 17 feet of straight run will suffer at times from lack of draw. Remember, the stove eats air based upon how fast the exhaust leaves the stove, drawing in air as it does that.

I routinely see stovetop temps of 800. I use the stove in a basement to heat the entire house (or try to). Just loaded 4 splits into the stove 20 minutes ago and the temps are nearly 500 now, but she is just starting to purr. Creosote is smoke that is wet and cooled. Temperature is the answer and air with good wood provides the temps.

 

[begreen]

Try to take it up to 400F and see how that works out. And add that 2ft section to the pipe. 16ft is what most stoves are tested at and it will make your installation legal.

 

[rijim]

2f



2ft vs 3ft is same price but what is advantage of a longer chimney? thanks.

The extra length will increase draft plus the safety factor.

 

[begreen]

Note that if the pipe sticks out of the rooftop more than 5 ft it will need to be braced.

 

[ddahlgren]

2f



2ft vs 3ft is same price but what is advantage of a longer chimney? thanks.

I thought when I read the nation fire code at least for 2005 it was a minimum of 3 feet off the roof and 3 feet taller than anything within 10 feet away.

 

[cliff88]

Update: Thanks for the input , everyone.

1. Cedar is actually douglas fir. I didnt realize that douglas fir looked so similar to cedar. ie red wood. The bark is definitlley douglas fir.
2. I retried the "cedar" in the shed at higher temperature and I get no creosote buildup on window so I was doing some weird greenhorn thing.
3. I dont regret the larger stove. I can run smaller hotter fires and I need large stove to last the night .
4. I dont even have to think about insulating the walls. Its a soft life with all these heat.

 

[cliff88]

I thought when I read the nation fire code at least for 2005 it was a minimum of 3 feet off the roof and 3 feet taller than anything within 10 feet away.

2ft in canada and in my englander manual.

 

[jatoxico]

...Its a soft life with all these heat.

funny