Rick 386 wrote:Soooooooooooooooooooooo,
Cold coal, how did you make out overnight ?????

mason coal burner wrote:i have been watching this post from the start and i can't believe how rude so of these guys have been . this is the first time i've seen this here . don't give up you won't regret it .
There are two techniques we know of to reduce chimney updraft, and both involve some attendant risk. Barometric dampers, often used in conjunction with oil-burning furnaces, are installed in the stovepipe and have an adjustable, weighted flapper that is drawn inward by the updraft, allowing room air to enter the pipe to reduce chimney updraft in much the same way as the thumb slide on a vacuum cleaner hose reduces suction power below. The problem with barometric dampers is, the reduced updraft might adversely affect the secondary burn, reducing efficiency and increasing emissions. Further, the intrusion of room-temperature air into the flue cools the flue gases, causing increased creosote formation. Finally, if the increased formation of creosote leads to a chimney fire, the resulting extreme updraft will pull the barometric damper WIDE open, and could allow the chimney fire to rage out of control.
I'm re-firing it now for the 1st time in a day and a half. Had a cold breeze downdraft for a minute until pipe heated, smoke comes through glass seams when draft is down if you close ash door, As to these barometric dampers I read good and bad. I read good here, but what's your thoughts on this Mason, or anyone?
Shakedown seems to be my biggest hurdle as I think if I had gotten ash out from under what was lit yesterday morning enough oxygen coming up would have made new light. I might see why when looking at this.
[/quote]I notice his grates go in 2 directions, mine tilt forward and back to level, not back from level as well. Mine's like a slot machine arm, one way only. Broken? Supposed to be that way? Either way I best get back to this, I got it to light after 1st fire and left the 2 layers in under wood, then added more coal again, this is new as it now has to spread down.
Bear038 wrote:
These few lines above here Coldcoal, may just be the root of your problem. You may not have enough draw on that chimney. I have never had a down draft in the set up that I am using, so that may make the burning of coal much easier. What is the height of your chimney relative to what is around it? Do you have trees or higher roofs, or other building causing the down drafts into your place. It may not be easy, but just maybe you need a taller chimney.

As to barometric dampers on your particular chimney, with down drafts like that at all, not so sure you should use one. I would be curious to see what others have to say, but maybe coal is not such a good idea if you can be getting these down drafts.
You may be expecting to get too much of the ash out. You will never get it all, you just need to get enough at first to liven up the fire for the new coal. Once the new fire gets going it seems it is easier to shack more ash out.
It sounds like your grates are working as designed by harman. Personally I would agree that there have to be better systems for getting the ash out, ...


franco b wrote:Your quote about barometric dampers is by someone who obviously does not understand either wood or coal burning.
Barometric dampers are not recommended for wood because of the danger of runaway chimney fires in the event of creosote buildup.
Your fire is going out because it is not getting enough air except under conditions of high stack temperatures where draft is so strong that the excess air is enough to keep the coal going. As soon as you throttle it down it goes out.
Air is going around the coal bed and not through it. I would suspect that it is going behind all those loose bricks, or the glass is leaking so badly that it is killing draft through the coal bed.
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