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Black fuzz or stage 1 build up

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by JrCRXHF, Mar 19, 2013.

  1. JrCRXHF

    JrCRXHF Burning Hunk

    Joined:
    Apr 28, 2008
    Messages:
    218
    Loc:
    Mid, Michigan
    I have a harmon SF-260 coal/wood boiler. I get about a half of a quart of black fuzz every year when i sweep. The chimney is a triple wall stainless liner in a older gas flue. I also poured insulation around the pipe to keep as much heat in as possible. I get black flake build up on the screen on the top but nothing towards the boiler from there.

    I burn 375-450F a night with seasoned wood 18-23%. Most days i turn off the heat on the house when i go to work and then fire the boiler up when i get home and burn 50-125lbs of wood a night to bring the temp back up. I do this so the boiler will get as much wide open burn time as possible.

    I don't have room in the boiler room for storage(i only wish i did) is there anything else that i am missing to keep the flue pipe hotter other then burn the boiler hotter. I think when i do go to bed that by 2:00-3:00am the boiler is back to cycling and this might be where i am getting my build up from.

    the little spot where there is no insulation on the lower exhaust part is where i take the temps from with a Fluke IR.
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  2. pen

    pen There are some who call me...mod. Staff Member

    Joined:
    Aug 2, 2007
    Messages:
    7,116
    Loc:
    N.E. Penna
    It's that's a pint of creosote per year total, keep doing what you are doing.

    That's excellent in my book.

    pen
  3. maple1

    maple1 Minister of Fire

    Joined:
    Sep 15, 2011
    Messages:
    4,252
    Loc:
    Nova Scotia
    +1 on that. With my old unit I sometimes filled a 5 gallon foundation coating bucket with a full chimney (30 ft.) & smoke pipe cleaning. I swept 3 times a year.
  4. JrCRXHF

    JrCRXHF Burning Hunk

    Joined:
    Apr 28, 2008
    Messages:
    218
    Loc:
    Mid, Michigan
    Ok i will keep going. The only down side of the metal roof i have on my house is i can not get on the roof to clean out the chimney in the winter. So that is why i worry maybe a little more then i should.
  5. maple1

    maple1 Minister of Fire

    Joined:
    Sep 15, 2011
    Messages:
    4,252
    Loc:
    Nova Scotia
    A new metal roof on my house two years ago was the final thing that pushed me into dropping the hammer on a gassifier. I had one very close call the first time I swept on the metal two stories up - that stuff is scary slippery even with just a couple drops of water on it.
  6. JrCRXHF

    JrCRXHF Burning Hunk

    Joined:
    Apr 28, 2008
    Messages:
    218
    Loc:
    Mid, Michigan
    Yeah i only wish i could get a gasifier. Not much point seeing this one is paid for and was really cheap. If i could have even 1000 gallons of storage it would be different i even thought i would try to figure out a way to sweep from the bottom up but i have not really figured anything out yet.

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