That's some very kind words. I have been in the chimney sweep business for about 25 years and education is definitely something people enjoy. Thanks for the words of encouragement.
I looked this word up because in the song "Deportees" The Lyrics say "oranges are left in the Creosote dump" - the song was written in the 1940's - maybe that was a thing back then
@@AStepInTimeChimney Dude - for real? Obviously we're here to learn from you. The music is too loud and not entirely appropriate for the subject matter. It was legitimate feedback.
As a retired Paramedic/Firefighter from the state of Florida I've not heard of too many chimney fires in the county where I live that I worked in but we did have a few and they were usually rapidly extinguished since we got there quickly. It would be nice to know what causes homes to catch fire since the chimney is supposed to be able to keep the Flames inside of it. Maybe it's poorly sealed chimneys where flames are able to get past some joints that are missing compound but it is not a subject I'm very familiar with.
Hi! Thank you for this awesome video!! I had my Jotulle wood burning fireplace professionally cleaned in September 2023. I use it everyday. Today, I noticed black pieces of soot like pieces sitting outside on the snow. Is that creosote? Do I need my chimney cleaned again so soon? Also when the temperature lowers at the end of a burn how do you prevent creosote build up? Thank you so much for your wonderful video and information.
Great presentation with all the info you need! Interesting juxtaposition with the euro piano club music backing track,, but strangely not off putting as the info is compelling.
I have a wood burning cooking range with boiler for radiators. It has a lever to set for oven or central heating. On the central heating setting it changes the smoke path so it has to go over 3 extra heat exchanger panels. I found that restricted the flow of smoke enough to cause tar deposits on the inside of the chimney and liquid creosote under the ash pan of the stove. I now always leave the lever on oven, bypassing said panels. The radiators actually get hotter like that because the fire is able to burn at the right temperature.
I am not familiar with your unit but there are some wood stoves that have a bypass door. It is used for cleaning. Check your owners manual to make sure it is burning properly.
Is there any diy to remove stage 3 of creosote? Like burning cans or burning the log buster few times a week for some period? You stated some temperature that I even can't imagine reach in my wood stove. The highest temperature I got in my stove pipe was 600 f. Thank you so much for your precious help
From my buddy chat: Creosote is a thick, oily substance that is a byproduct of the distillation of tar from wood or coal. It's primarily known for its use as a wood preservative and for its potential health hazards when inhaled or ingested. While creosote has energy content due to its organic nature, its use as a primary fuel source is not common for several reasons: 1. **Toxic Emissions**: When burned, creosote can release a variety of harmful compounds, including polycyclic aromatic hydrocarbons (PAHs), which are potential carcinogens. This makes it unsuitable for most combustion-based applications without adequate emissions control. 2. **Inefficiency**: There are much more efficient and cleaner fuel sources available. Using creosote would require special handling and equipment to mitigate the harmful effects, making it less economically viable compared to other fuels. 3. **Better Alternatives**: Given the environmental and health concerns associated with burning creosote, it's more reasonable to consider other forms of biomass or even other waste products as potential fuel sources. 4. **Limited Availability**: Creosote is a byproduct, and there might not be enough of it produced to make it a major fuel source. However, there are some industrial applications where creosote, or the tar from which it's derived, might be used as a component in a fuel mix, especially in processes that already deal with dirty fuels and have the necessary emission control equipment in place. But as a primary fuel for general use, it's not advisable. If you're thinking of using creosote as a fuel in a specific context, be sure to consult with experts and consider the environmental and health implications carefully.
Your talking about creosote cleaning logs. The chemical in the burning changes composition of creosote to a powder but it still needs removal. Chimney sweeps have a different spray but is more concentrated but burning the logs is good. But the residue still need removal.
Oh yes they do! Almost every masonry heater that I’ve cleaned is caked in creosote, Inside every port and the flue is very clean. The only reason why that is, is because people don’t know how to use them properly. Nobody instructs them how to use it.
My wood stove pipe off the stove, use to get sooo hot, I worried about it, 18inches above pipe a thermometer, it said one night, 600 - 650 😮, so I designed a 3/16th thick steel baffle for it at 30 degrees angle inside of the box, changed the whole dynamic. Now, my fire box still vents great, nice hot fires in the box, brick lined inside with the new baffle, however, my pipe barely makes it over 350, most of time it stays at 275 - 300 degrees now, the whole time, the flames are blue and orange, when I look outside at night with a flashlight, barely any smoke out of it yet its venting well when I open the door. the stove I'm running is an old early 1990s Trailblazer stove, I found on Facebook Marketplace, bought for 160.00, bought new glass for it from Oregon Glass 70.00 bucks. resanded it and painted it with high heat black paint. Looks great now, seems to be running good, haven't had to use my Central Gas heat now hardly at all. What do you think of all of this? since your an expert. Thanks
The statement that hardwood burns hotter than softwood is generally true, and the reasons for this can be understood through the properties and structure of the woods: 1. **Density**: Hardwoods, like oak, maple, and hickory, are generally denser than softwoods like pine, spruce, and cedar. The denser the wood, the more mass there is to combust per unit of volume. This means that for a given volume of wood, hardwoods typically have more potential energy to release when burned. 2. **Resin Content**: Softwoods tend to have higher resin (sap) content than hardwoods. While this resin can make softwoods ignite more easily and burn with a lively flame, it can also cause them to burn faster and with more creosote production. Creosote is a flammable substance that can build up in chimneys, leading to chimney fires if not regularly cleaned. 3. **Burn Time**: Hardwoods usually burn slower and produce a longer-lasting coal bed compared to softwoods. This coal bed retains and radiates heat over a longer period, giving the perception of a hotter fire. 4. **Energy Content**: On a per-weight basis, hardwood and softwood have roughly similar energy content (BTUs). However, since hardwood is denser, a log of hardwood will contain more energy than a log of softwood of the same size, leading to a hotter and longer-lasting fire. 5. **Moisture Content**: Well-seasoned hardwood tends to have lower moisture content compared to softwood when both are dried for the same duration. Burning wet wood, regardless of its type, reduces the heat output of a fire because energy is wasted in evaporating the water. It's worth noting that not all hardwoods are the same, and not all softwoods are the same. There's variability within each category. For instance, some hardwoods are less dense than others, and some softwoods are denser than certain hardwoods. For fireplace use, hardwoods are often preferred because they produce a longer-lasting, hotter fire with less creosote buildup. However, softwoods can be ideal for kindling and quick fires due to their easy ignition properties.
15% moisture content in wood is the same as 15% moisture content in hardwood. However, hardwood has denser wood and provides more fuel verse moisture content and thus creates less creosote. Thats why people say, burn hard wood. It may also be that hardwood cures quicker (decrease moisture content.)
I would respond to this but I am a little tired of typing. So I asked my AI friend Chat to answer your question: The statement that hardwood burns hotter than softwood is generally true, and the reasons for this can be understood through the properties and structure of the woods: 1. **Density**: Hardwoods, like oak, maple, and hickory, are generally denser than softwoods like pine, spruce, and cedar. The denser the wood, the more mass there is to combust per unit of volume. This means that for a given volume of wood, hardwoods typically have more potential energy to release when burned. 2. **Resin Content**: Softwoods tend to have higher resin (sap) content than hardwoods. While this resin can make softwoods ignite more easily and burn with a lively flame, it can also cause them to burn faster and with more creosote production. Creosote is a flammable substance that can build up in chimneys, leading to chimney fires if not regularly cleaned. 3. **Burn Time**: Hardwoods usually burn slower and produce a longer-lasting coal bed compared to softwoods. This coal bed retains and radiates heat over a longer period, giving the perception of a hotter fire. 4. **Energy Content**: On a per-weight basis, hardwood and softwood have roughly similar energy content (BTUs). However, since hardwood is denser, a log of hardwood will contain more energy than a log of softwood of the same size, leading to a hotter and longer-lasting fire. 5. **Moisture Content**: Well-seasoned hardwood tends to have lower moisture content compared to softwood when both are dried for the same duration. Burning wet wood, regardless of its type, reduces the heat output of a fire because energy is wasted in evaporating the water. It's worth noting that not all hardwoods are the same, and not all softwoods are the same. There's variability within each category. For instance, some hardwoods are less dense than others, and some softwoods are denser than certain hardwoods. For fireplace use, hardwoods are often preferred because they produce a longer-lasting, hotter fire with less creosote buildup. However, softwoods can be ideal for kindling and quick fires due to their easy ignition properties.
The take away message is, BURN DRY WOOD, BURN IT HOT and... properly clean your chimney EVERY heating season! ...and... HAVE your system inspected every year by a licensed professional. Stay toasty my friends!
I do not doubt that you have expertise in cleaning a chimney or flue. But you are no expert on the causes of creosote. The number one cause of creosote is operator error- people burning wet wood. There is no difference between hardwood and softwood when it comes to creosote. If your wood is below twenty percent moisture and you burn hot fires you will not have a creosote issue. If you disagree with what I am telling you, come back to me with some science. About the only correct point you have concerns the chimney being warm. Yes, you want an insulated chimney where it exits the roof. But that is more for controlling soot deposit than preventing creosote build-up. If there is no creosote in the exhaust none will be created in the flue. That is why masonry stoves and coal stoves do not deposit creosote in your flue and chimney. The masonry stove burns the wood volatiles completely because of its insulated firebox. The coal stove burns anthracite coal and simply does not have the ingredients for creosote.
You have good points but the difference in hardwood and softwood is aging. If you age softwood, it will dry it out and allow it to burn completely faster. Hardwood has the same issue and so you equation is moisture content and densification. Good point and a good topic for discussion.
lol…there’s all types of weird stuff going on in there? No…no…it is all explainable by science and physics sir. And it is not the temperature of the gas and smoke that would VAPORIZE the particles, only the temperature of the fire itself affects the gas and smoke and determines vaporization, if any. I think it would be best sir if you did not try and use your experience and heresay to try and fill in the gaps of the explanation and stick to reliable and valid facts from a scientific source because although your explaining things okay for someone who is watching this for simple passing knowledge in total lamens, for someone trying to make understand the science of what is happening, this won’t cut it. The short answer is that wood does not vaporize at the temperatures produced in a fireplace. It simply is no where near hot enough. If you burn wood hot and long enough, most of its constituents, primarily lignins and cellulose, will break down under the heat into more volatile particles; this process is called pyrolysis of wood. You are a very nice person though to your credit and even though that has absolutely nothing to do with what I am saying, I just wanted to let you know I appreciate the effort good sir. Keep trucking along!
Nobody ever explains, how a fire in the chimney and fireplace, cause the house to burn down. People just say, A chimney fire will burn your house down. 😱🔥
Simplified version with extrapolation. creosote is sortof a concentrated wood. think of it like diesel but dry, you cant start it with a match but ince it burns it burns hot and fast. so when a chimney catches fire on creosote it burns hot and catches more creosote on fire, essentially it takes a flue that might run at 300 F degrees and start rocketing it past 1000 F this breaks down mortor and clay AND makes said morter and clay very hot, hot enough to where simple contact can start igniting wood, melting plastic, and if chimney falls apart due to heat then flames start getting exposed to these hot surfaces causing house fires. Risk of house fire diminishes with proper burn and chimney type. so say your chimney is in middle of house thats worst cast, mason chimney mostly or fully exposed outside is better, stainless steel doublewall chimney fully exposed with 1ft house clearance brackets, very hard to catch house a blaze but can still melt siding etc.
@@andyabel3072 wow, what a great explanation. Thanks very much for taking the time to explain this. I guess I just never really thought a chimney is basically turned into a blast furnace gone out of control, just from creasote build up. 😳🔥🚒
Excellent video. There are many creosote/chimney videos out there but yours is top notch. Thanks
That's some very kind words. I have been in the chimney sweep business for about 25 years and education is definitely something people enjoy. Thanks for the words of encouragement.
I love this guys demeanor... hes got that "Best uncle on the planet" energy! Love your content, man!!
Agreed! He knows his sheeit! and explains it very well
I looked this word up because in the song "Deportees" The Lyrics say "oranges are left in the Creosote dump" - the song was written in the 1940's - maybe that was a thing back then
Thank you so much for your comprehensive and educational topic .
turn off the music please
Hit your mute button:-)
@@AStepInTimeChimney Dude - for real? Obviously we're here to learn from you. The music is too loud and not entirely appropriate for the subject matter. It was legitimate feedback.
@@AStepInTimeChimney turn the music up plz. Thanks
Weird response to legitimate feedback. Thats all it took to make me re-think subscribing or liking the video.
I came here for the music
Great video with everything I needed to know thanks
crucial information. background music was too loud for me.
That was very informative,,, Right to the point Great video
Thank William- sorry it took forever to respond.
As a retired Paramedic/Firefighter from the state of Florida I've not heard of too many chimney fires in the county where I live that I worked in but we did have a few and they were usually rapidly extinguished since we got there quickly. It would be nice to know what causes homes to catch fire since the chimney is supposed to be able to keep the Flames inside of it. Maybe it's poorly sealed chimneys where flames are able to get past some joints that are missing compound but it is not a subject I'm very familiar with.
Thank you for this thorough and helpful information.
Glad it was helpful!
Hi! Thank you for this awesome video!! I had my Jotulle wood burning fireplace professionally cleaned in September 2023. I use it everyday. Today, I noticed black pieces of soot like pieces sitting outside on the snow. Is that creosote? Do I need my chimney cleaned again so soon? Also when the temperature lowers at the end of a burn how do you prevent creosote build up? Thank you so much for your wonderful video and information.
Great presentation with all the info you need! Interesting juxtaposition with the euro piano club music backing track,, but strangely not off putting as the info is compelling.
6:11 the danger
I have a wood burning cooking range with boiler for radiators. It has a lever to set for oven or central heating. On the central heating setting it changes the smoke path so it has to go over 3 extra heat exchanger panels. I found that restricted the flow of smoke enough to cause tar deposits on the inside of the chimney and liquid creosote under the ash pan of the stove. I now always leave the lever on oven, bypassing said panels. The radiators actually get hotter like that because the fire is able to burn at the right temperature.
I am not familiar with your unit but there are some wood stoves that have a bypass door. It is used for cleaning. Check your owners manual to make sure it is burning properly.
Thank you very very very much.. knowledge is power.
This video was very helpful!
I'm so glad!
Is there any diy to remove stage 3 of creosote? Like burning cans or burning the log buster few times a week for some period? You stated some temperature that I even can't imagine reach in my wood stove. The highest temperature I got in my stove pipe was 600 f. Thank you so much for your precious help
The chimney sweeping logs help to break down stage 3 to a stage 2 creosote and then you can sweep it out.
pretty thorough explanation 👏 thank you
Thank you
I'll have to ask if creosote can be used in some kind of generator. Or other various uses.
From my buddy chat: Creosote is a thick, oily substance that is a byproduct of the distillation of tar from wood or coal. It's primarily known for its use as a wood preservative and for its potential health hazards when inhaled or ingested. While creosote has energy content due to its organic nature, its use as a primary fuel source is not common for several reasons:
1. **Toxic Emissions**: When burned, creosote can release a variety of harmful compounds, including polycyclic aromatic hydrocarbons (PAHs), which are potential carcinogens. This makes it unsuitable for most combustion-based applications without adequate emissions control.
2. **Inefficiency**: There are much more efficient and cleaner fuel sources available. Using creosote would require special handling and equipment to mitigate the harmful effects, making it less economically viable compared to other fuels.
3. **Better Alternatives**: Given the environmental and health concerns associated with burning creosote, it's more reasonable to consider other forms of biomass or even other waste products as potential fuel sources.
4. **Limited Availability**: Creosote is a byproduct, and there might not be enough of it produced to make it a major fuel source.
However, there are some industrial applications where creosote, or the tar from which it's derived, might be used as a component in a fuel mix, especially in processes that already deal with dirty fuels and have the necessary emission control equipment in place. But as a primary fuel for general use, it's not advisable.
If you're thinking of using creosote as a fuel in a specific context, be sure to consult with experts and consider the environmental and health implications carefully.
Do the logs that supposedly burn off creosote actually help at all?
Your talking about creosote cleaning logs. The chemical in the burning changes composition of creosote to a powder but it still needs removal. Chimney sweeps have a different spray but is more concentrated but burning the logs is good. But the residue still need removal.
Very informative thank you 😊
Thank you too!
Have you any experience with masonry stoves
Not much with masonry stoves
The best yet on creosote with good advice but please get rid of music.
Damn. That's probably what this cart is doing in my lungs
masonry heaters dont produce creosote due to high efficiency burn
Oh yes they do! Almost every masonry heater that I’ve cleaned is caked in creosote, Inside every port and the flue is very clean. The only reason why that is, is because people don’t know how to use them properly. Nobody instructs them how to use it.
My wood stove pipe off the stove, use to get sooo hot, I worried about it, 18inches above pipe a thermometer, it said one night, 600 - 650 😮, so I designed a 3/16th thick steel baffle for it at 30 degrees angle inside of the box, changed the whole dynamic. Now, my fire box still vents great, nice hot fires in the box, brick lined inside with the new baffle, however, my pipe barely makes it over 350, most of time it stays at 275 - 300 degrees now, the whole time, the flames are blue and orange, when I look outside at night with a flashlight, barely any smoke out of it yet its venting well when I open the door. the stove I'm running is an old early 1990s Trailblazer stove, I found on Facebook Marketplace, bought for 160.00, bought new glass for it from Oregon Glass 70.00 bucks. resanded it and painted it with high heat black paint. Looks great now, seems to be running good, haven't had to use my Central Gas heat now hardly at all. What do you think of all of this? since your an expert. Thanks
your explanation on hardwood was off. I could sense it. anyone got a correction?
The statement that hardwood burns hotter than softwood is generally true, and the reasons for this can be understood through the properties and structure of the woods:
1. **Density**: Hardwoods, like oak, maple, and hickory, are generally denser than softwoods like pine, spruce, and cedar. The denser the wood, the more mass there is to combust per unit of volume. This means that for a given volume of wood, hardwoods typically have more potential energy to release when burned.
2. **Resin Content**: Softwoods tend to have higher resin (sap) content than hardwoods. While this resin can make softwoods ignite more easily and burn with a lively flame, it can also cause them to burn faster and with more creosote production. Creosote is a flammable substance that can build up in chimneys, leading to chimney fires if not regularly cleaned.
3. **Burn Time**: Hardwoods usually burn slower and produce a longer-lasting coal bed compared to softwoods. This coal bed retains and radiates heat over a longer period, giving the perception of a hotter fire.
4. **Energy Content**: On a per-weight basis, hardwood and softwood have roughly similar energy content (BTUs). However, since hardwood is denser, a log of hardwood will contain more energy than a log of softwood of the same size, leading to a hotter and longer-lasting fire.
5. **Moisture Content**: Well-seasoned hardwood tends to have lower moisture content compared to softwood when both are dried for the same duration. Burning wet wood, regardless of its type, reduces the heat output of a fire because energy is wasted in evaporating the water.
It's worth noting that not all hardwoods are the same, and not all softwoods are the same. There's variability within each category. For instance, some hardwoods are less dense than others, and some softwoods are denser than certain hardwoods.
For fireplace use, hardwoods are often preferred because they produce a longer-lasting, hotter fire with less creosote buildup. However, softwoods can be ideal for kindling and quick fires due to their easy ignition properties.
Can I just have an insulated flu?
The music is not enough and it's not loud enough. Why am I so into this?
15mc in pine is the same as 15mc in hardwood.
15% moisture content in wood is the same as 15% moisture content in hardwood. However, hardwood has denser wood and provides more fuel verse moisture content and thus creates less creosote. Thats why people say, burn hard wood. It may also be that hardwood cures quicker (decrease moisture content.)
Pretty sure that HARDWOOD contains moisture and SOFTWOOD (like pine) burns hotter.
I would respond to this but I am a little tired of typing. So I asked my AI friend Chat to answer your question: The statement that hardwood burns hotter than softwood is generally true, and the reasons for this can be understood through the properties and structure of the woods:
1. **Density**: Hardwoods, like oak, maple, and hickory, are generally denser than softwoods like pine, spruce, and cedar. The denser the wood, the more mass there is to combust per unit of volume. This means that for a given volume of wood, hardwoods typically have more potential energy to release when burned.
2. **Resin Content**: Softwoods tend to have higher resin (sap) content than hardwoods. While this resin can make softwoods ignite more easily and burn with a lively flame, it can also cause them to burn faster and with more creosote production. Creosote is a flammable substance that can build up in chimneys, leading to chimney fires if not regularly cleaned.
3. **Burn Time**: Hardwoods usually burn slower and produce a longer-lasting coal bed compared to softwoods. This coal bed retains and radiates heat over a longer period, giving the perception of a hotter fire.
4. **Energy Content**: On a per-weight basis, hardwood and softwood have roughly similar energy content (BTUs). However, since hardwood is denser, a log of hardwood will contain more energy than a log of softwood of the same size, leading to a hotter and longer-lasting fire.
5. **Moisture Content**: Well-seasoned hardwood tends to have lower moisture content compared to softwood when both are dried for the same duration. Burning wet wood, regardless of its type, reduces the heat output of a fire because energy is wasted in evaporating the water.
It's worth noting that not all hardwoods are the same, and not all softwoods are the same. There's variability within each category. For instance, some hardwoods are less dense than others, and some softwoods are denser than certain hardwoods.
For fireplace use, hardwoods are often preferred because they produce a longer-lasting, hotter fire with less creosote buildup. However, softwoods can be ideal for kindling and quick fires due to their easy ignition properties.
The take away message is, BURN DRY WOOD, BURN IT HOT and... properly clean your chimney EVERY heating season! ...and... HAVE your system inspected every year by a licensed professional. Stay toasty my friends!
Burning a hot fire is so impossible for all these geniuses in America
seriously people are starting fires inside their homes with wet logs and gasoline
Rubbish hat!
But great video that was extremely informative.
Thankyou...
lol
Smokey says... burn weeds not trees...😅
Bbq brought me here
We’re your burgers and sausages tasty?
Simple, dont use one and itll be your least worry!
Everyone like to burn a cozy fire. Ladies love a man who does caveman fire stuff.
Excellent explanation. I just wish you had skipped the music. Thumbs up anyway. Cheers
Music came from the director but thanks.
This is way way too much info for the situation.
👍👌👍👌
thank you
Micah Richards sent me here.
very annoying distracting music, cant concentrate on what he is saying. shame as its very informative.
I do not doubt that you have expertise in cleaning a chimney or flue. But you are no expert on the causes of creosote. The number one cause of creosote is operator error- people burning wet wood. There is no difference between hardwood and softwood when it comes to creosote. If your wood is below twenty percent moisture and you burn hot fires you will not have a creosote issue. If you disagree with what I am telling you, come back to me with some science. About the only correct point you have concerns the chimney being warm. Yes, you want an insulated chimney where it exits the roof. But that is more for controlling soot deposit than preventing creosote build-up. If there is no creosote in the exhaust none will be created in the flue. That is why masonry stoves and coal stoves do not deposit creosote in your flue and chimney. The masonry stove burns the wood volatiles completely because of its insulated firebox. The coal stove burns anthracite coal and simply does not have the ingredients for creosote.
You have good points but the difference in hardwood and softwood is aging. If you age softwood, it will dry it out and allow it to burn completely faster. Hardwood has the same issue and so you equation is moisture content and densification. Good point and a good topic for discussion.
en español
Hat doesn't fit
Cause all this fame and attention has given me a big head.
lol…there’s all types of weird stuff going on in there? No…no…it is all explainable by science and physics sir. And it is not the temperature of the gas and smoke that would VAPORIZE the particles, only the temperature of the fire itself affects the gas and smoke and determines vaporization, if any. I think it would be best sir if you did not try and use your experience and heresay to try and fill in the gaps of the explanation and stick to reliable and valid facts from a scientific source because although your explaining things okay for someone who is watching this for simple passing knowledge in total lamens, for someone trying to make understand the science of what is happening, this won’t cut it. The short answer is that wood does not vaporize at the temperatures produced in a fireplace. It simply is no where near hot enough. If you burn wood hot and long enough, most of its constituents, primarily lignins and cellulose, will break down under the heat into more volatile particles; this process is called pyrolysis of wood. You are a very nice person though to your credit and even though that has absolutely nothing to do with what I am saying, I just wanted to let you know I appreciate the effort good sir. Keep trucking along!
This guy either lost a bet or this video was made in 1920s
Dude is nervous as fuck. Just relax my man be yourself
Really, dude, i'm chill as ice. send me your channel.
Dress up in that garb to discuss the topic tells me it's a complete waste of time.
Nobody ever explains, how a fire in the chimney and fireplace, cause the house to burn down. People just say, A chimney fire will burn your house down. 😱🔥
Simplified version with extrapolation.
creosote is sortof a concentrated wood. think of it like diesel but dry, you cant start it with a match but ince it burns it burns hot and fast. so when a chimney catches fire on creosote it burns hot and catches more creosote on fire, essentially it takes a flue that might run at 300 F degrees and start rocketing it past 1000 F this breaks down mortor and clay AND makes said morter and clay very hot, hot enough to where simple contact can start igniting wood, melting plastic, and if chimney falls apart due to heat then flames start getting exposed to these hot surfaces causing house fires. Risk of house fire diminishes with proper burn and chimney type. so say your chimney is in middle of house thats worst cast, mason chimney mostly or fully exposed outside is better, stainless steel doublewall chimney fully exposed with 1ft house clearance brackets, very hard to catch house a blaze but can still melt siding etc.
@@andyabel3072 wow, what a great explanation. Thanks very much for taking the time to explain this. I guess I just never really thought a chimney is basically turned into a blast furnace gone out of control, just from creasote build up. 😳🔥🚒