
11/20/08, 09:40 AM
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Join Date: Jan 2005
Location: NC
Posts: 622
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Yep, turpentine comes from pine trees. Burning the wood at a high temp would burn off the volatile oil (turpentine) before it could be smelled.
I'm thinking they got the stove heated and had a bed of coals. then they added fresh pine to the pile of coals but kept the air choked off so rather than the coals heating up and catching fire to the new wood, the new wood was kind of cooked...heated just enough to volatilize (or boil) the turpentine oil out of the wood, sending it out the chimney unburned.
Not particularly dangerous, other than the cooling oil coating the inside to the chimney. When a really hot fire rages up the chimney, it can catch the stuff on fire. If enough has built up and if the fire is given acces to all the air it wants, it burns at sufficient temperature to make the chimney glow or even melt.
The following explanation is for knowledge only, as actually trying any of it may kill your house and you with it....
Some folks who have a woodstove that can have the air shut off and a stovepipe chimney let the creosote build up, knowing that a fire will eventually start. The chimney fire always starts when a fire is started, so they're always right there to be able to do something about it. When the chimney fire starts, they give the fire just enough air (via the air control valve on the woodstove) to let the pipe glow a dull red at the bottom and feed it just enough air to let the fire progress up the chimney in a controlled fashion...being sure to keep the chimney fire hot enough to burn off the creosote. Glowing dull red is just this side of OK, glowing brighter than that is on the edge of not OK and melting is definately bad, because the house burns down and people die. (These fires start at the stove top, where there is enough fire and heat heading into the pipe to catch the creosote on fire. Once the fire starts, it is able to progress its way up the chimney, running all the way to the top, when it runs out of fuel.)
I have seen this done one time. It was pretty cool to watch the ring of fire progress its way up slowly and it resulted in a very clean chimney.
I have had chimney fires in both masonry chimneys (in an open fireplace) and in stovepipe chimneys. The open fireplace type was pretty crazy, as the air was uncontrollable and the fire raged, making the whole house shake and fire shot out to the top. The stovepipe variety was not so scary, as just shutting down the stove's air supply put the fire out almost instantly. I brushed the chimney after extinguishing the chimney fire and have learned my lessons about how much creosote I am willing to let build up before I brush it out. I am not afraid of a stovepipe chimney fire because I know about the condition of my chimney (having built it and having cleaned it myself for years) and I have seen and experienced them being nursed up a pipe. Nonetheless, I don't allow creosote build up until I get one.
I have never "nursed" a chimney fire up the pipe and don't ever plan to. And I don't suggest you do it either...any crack in the masonry or hole it the stove pipe in the attic and you and your house are dead....
One of the ways I know its time for me to clean the chimney is that it doesn't draft as well (because the crunchy stuff on the inside of the pipe inhibits the smooth circular flow of the air) and smoke tends to leak inside the house.
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