I have a question in ref. to a flue liner issue. I have a wood/coal burning insert, planning on burning all hardwood, made by Harman, with the standard 7″ ovalised, 6′ long flue liner that is just shoved into the existing chimney. I want to extend the flue liner all the way to the top and have been pricing various kits. The chimney sweep that inspected and cleaned the flues stated that my flue was cracked and unsafe to burn with. I was told that if I put a flue liner kit in, I would need to wrap it with some type of blanketing. Is this true? , do I need to do this? , Or will it be safe with just the Stainless Steel flexible liner extended up to the top of the existing chimney. This blanketing is to be of a fiberglass insulating nature and is very costly per foot. Any Suggestions?
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I'm no chimney pro, but I believe the insulation is to keep the stainless flue warm. There is a lot of cold air between the liner and the existing cracked flue when you burn a fire. And for your stove to draw properly as well as to prevent creosote buildup from a cold flue, you need to keep the temperature of the exhaust gasses up. Because Metal is such a great conductor of heat, the cold air surrounding the liner but inside the existing cracked flue will suck all the heat out of the exhaust gasses before they exit the chimney. This could lead to problems with poor draft and excessive creosote buildup.
At least, that's my thought. I've been known to be wrong in the past. I do know that when my liner was installed, the sweep that did it insulated with some fireprrof granular product around the liner.
I can see that as being a possible problem, although I wish I knew for sure. Any suggestions on who could give me a definite answer. It seems so easy to just shove it in the existing one, but nothing is ever that easy!! Thanks for the reply and get back to me if you know anything else. Thanks again.
http://forums.taunton.com/tp-breaktime/messages?msg=24368.1
Looks like it was my fault for not doing the link right. I got you to the thread but not the right posts.
The blankeet will help prevent creosote build but is not an absolute necessity if you will keep it clean..
Excellence is its own reward!
a flea and a fly got stuck in a flue
then they wondered what to do
the flea said"lets fly"
the fly said "lets flee"
so they flew through a flaw in the flue.
stupid, yeah , I know.listening for the secret.......searching for the sound...
but good Let the thunder crack and the waves roar.
We're going on.
http://forums.taunton.com/n/mb/message.asp?webtag=tp-breaktime&msg=24368.12
same topic
Excellence is its own reward!