Posted by jdemaris on December 21, 2009 at 07:13:00 from (67.142.130.47):
In Reply to: Re: OT : Creosote posted by Southtowns27 on December 20, 2009 at 19:57:56:
I suspect your main problem is a cool chimney and wood that is not dry enough.
I realize you said your wood is seasoned, but that word means different things to different people.
Here where I live in New York, hard maple, hickory and red oak will not season properly in one summer. It looks fairly dry with the typical radial cracks, but will not burn near as clean as it should. On the other hand, ash and soft (red) maple, along with beech can dry fine in one summer if the sun ever comes out.
I don't know where you live and how long your summers are.
About the pipe. Most pipe sold in the USA is inferior to what is available in Canada. And, often it's made by the same companies. They just make two versions and are reluctant to cross borders. I had a heck of time getting Canadian pipe into New York. I use Selkirk Sentinel CF that has two inches of real insulation, not just air space. 8" ID and 13" OD. It came out in 1982 to meet the new stricter Canadian chimney standards (much stricter than in the USA). For an overburn rating, it is rated at 1700 degree F for a full hour, which is pretty amazing. The CAN4-S629-M84 specs are very rigid against cool pipe and burnout ratings.
I went through the trouble to get it since we too have a large wood furnace that gets turned down a lot. So, I needed a virtually fire burnout proof chimney that I could run hot to burn itself clean. Also, since it's so well insulated, it stays cleaner then any US pipe I've seen. Only bad buildup area is on top at the cap.
We have a huge wood furnace and since it also heats our hot water, I run it turned down way low and smoldering when the outside temps get up in the 40s. Chimney still stays fairly clean.
Funny thing is we tried to buy a Canadian built EPA woodfurnace. "EPA Caddy." At the time, it was the only EPA tested woodfurnace in the world. But, the factory in Québec refused to sell it to me here in NY. I begged them and told them I'd buy with a voided warranty, but they said "no." And gee, my family is French. Oh well.
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