Help with odor

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
  • Hope everyone has a wonderful and warm Thanksgiving!
  • Super Cedar firestarters 30% discount Use code Hearth2024 Click here

Brown2016

New Member
Jan 6, 2018
13
Young Harris
This is the second season for this stove. It's a Lopi and we have a double flue pipe. Last night we woke up to the smell of paint and the temp gauge was still midway in the green so at the time of smelling it, the fire was not out of control. We noticed that the outer flue pipe is starting to fade and was wondering if we may have gotten the pipe too hot that would cause paint fade and a chemical smell from the flue pipe.
 
Where was the thermometer and what type of thermometer is it
 
Cooked the paint on the outside of DSP? That was a hot one for sure.
 
Get a probe thermometer for the pipe. If it discolored the outside of double wall it is possible you had a fire in the pipe
 
Get a probe thermometer for the pipe. If it discolored the outside of double wall it is possible you had a fire in the pipe

Is it possible to have had a fire in the pipe when the temps were around 500? I thought in order to have a flue fire the temps and flames needed to reach a certain degree or height?
 
Is it possible to have had a fire in the pipe when the temps were around 500? I thought in order to have a flue fire the temps and flames needed to reach a certain degree or height?
It is absolutely possible. What is going on in the stove may or may not have anything to do with a chimney fire. If it is an intense fire the draft will increase allot causing the stove temps to go up considerably. But if it is a less intense slow burning chimney fire you may see little difference in stove temps. I don't know if you had a flue fire or not but it is a possibility.
 
It is absolutely possible. What is going on in the stove may or may not have anything to do with a chimney fire. If it is an intense fire the draft will increase allot causing the stove temps to go up considerably. But if it is a less intense slow burning chimney fire you may see little difference in stove temps. I don't know if you had a flue fire or not but it is a possibility.
We called the company that installed the stove and flue to have them come out and take a look. They kept saying that the discoloration was normal but I am having a hard time believing that the outer pipe should reach temps to discolor it and it be considered normal. With that and the strong smell if paint last night, something is off.
 
We called the company that installed the stove and flue to have them come out and take a look. They kept saying that the discoloration was normal but I am having a hard time believing that the outer pipe should reach temps to discolor it and it be considered normal. With that and the strong smell if paint last night, something is off.
It does sound like the flue pipe got a lot hotter than expected. Flue temps and stove top temps are not the same. The flue can get too hot sometimes when the stove's air is not turned down enough for the particular load of fuel. This can be due to unusually high draft (cold night) or more flammable fuel (smaller pieces, extra dry wood, high oil content wood, etc.).

How far closed was the air control? How long after reloading the stove was this?

Another possibility can be the way the stove connects to the chimney. Installations with a 90º going into a longish horiz. run and then a tee can tend to accumulate creosote due to sluggish flue gases cooling in that section.
 
Last edited:
My single wall is slightly lighter and flatter black the first 4 inches or so. How high up is yours discolored?
 
My single wall is slightly lighter and flatter black the first 4 inches or so. How high up is yours discolored?
That is very common on single wall. Very uncommon on double wall
 
It does sound like the flue pipe got a lot hotter than expected. Flue temps and stove top temps are not the same. The flue can get too hot sometimes when the stove's air is not turned down enough for the particular load of fuel. This can be due to unusually high draft (cold night) or more flammable fuel (smaller pieces, extra dry wood, high oil content wood, etc.).

How far closed was the air control? How long after reloading the stove was this?

Another possibility can be the way the stove connects to the chimney. Installations with a 90º going into a longish horiz. run and then a tee can tend to accumulate creosote due to sluggish flue gases cooling in that section.
The pipe goes straight up and through the roof. No bends. We loaded the box about 10 PM and woke up around 3 with the issue.
 
The pipe goes straight up and through the roof. No bends. We loaded the box about 10 PM and woke up around 3 with the issue.
That's several hours into the burn cycle and less common. Does this Lopi have a bypass control and if so could it have possibly not been closed all the way?