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"upside down" fire lighting in a gasifier?

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by pybyr, Jan 30, 2009.

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  1. pybyr

    pybyr Minister of Fire

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    Hello all--

    with my former wood/ hot air furnace, someone clued me into the counter-intuitive but very effective technique of upside-down fire building--

    --where you put the big wood on the bottom, and go to smaller and smaller up to the top, and then have the kindling and paper on top.

    that worked _really_ well with my old unit- the small stuff on top would "take off" and create a draft that'd get it roaring, and then drop coals into the bigger stuff below, which would begin to light off, too.

    I am curious as to whether anyone has tried this upside-down method with success in a downdraft gasifier?

    I recall NoFo mentioning having tried it with little success in his EKO 25- just wondering if it is a technique that is generally/ completely unsuited to getting a fire going in a downdraft gasifier, or whether it varies with unit/ wood/ technique, etc., and whether anyone has had any luck with it

    Thanks

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  2. Eric Johnson

    Eric Johnson Mod Emeritus

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    I keep meaning to try it, but haven't yet. During most of the heating season I'm just throwing wood on top of a bed of coals, so I do very little firestarting from scratch.
  3. Kipstr

    Kipstr New Member

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    I think I will try it right now I'll post my results later this evening.
  4. Kipstr

    Kipstr New Member

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    It didn't work as well as Nofossil's " Four minute gasifier startup, minimal smoke" I was about 25 minutes to get gasifaction.

    And yes I can get 4-5 minute gasifaction almost every time, using Nofossil startup.
  5. pybyr

    pybyr Minister of Fire

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    now we know- and thanks for being the guinea pig- with no storage yet, and with my oil turned off, I hadn't wanted to risk fooling with something other than the NoFo method. I can't really get gasification in 5 minutes, but I think that is because my remaining wood is not as dry as I wish it was...
  6. Fred61

    Fred61 Minister of Fire

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    That's exactly the way I lit my old Wood Gun. Big stuff, then kindling and paper on top! It was a negative pressure firebox with a huge fan on the output side and it moved tons of CFM of air. I didn't have you guys around back then to start me thinking about varying the fan speed, however it probably needed to move a hell of a lot of air because it didn't have provisions for secondary air. All the air came in through one motorized damper. The thing actually would blow sparks out of a 20 foot chimney on a regular basis.
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