In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

Good description of secondary burn?

Discussion in 'Modern EPA Stoves and Fireplaces' started by wildwest, Nov 20, 2014.

  1. wildwest

    wildwest Moderator

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    That's what I thought it should look like! Thanks
     
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  2. DexterDay

    DexterDay Administrator

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    In order to achieve secondary combustion, you must close the primary down more, so that the secondary inlet gets more attention.

    But having a hot fire, good coal bed, good wood, and good technique are all required.
     
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  3. MightyWhitey

    MightyWhitey

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    Better not keep talking "dirty" like that or you'll get "moderated"!!!:whistle::rofl: :lol:
     
  4. HDRock

    HDRock

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    What's your stove top temp when your pipe is at 850
     
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  5. DexterDay

    DexterDay Administrator

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    Much cooler.. But I have a convection deck and the blower always on High.

    I push this beast pretty hard to keep the basement about 80°. This keeps the floors warm throughout.
     
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  6. HDRock

    HDRock

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    I see :) I can run mine hard to with blower on high
     
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  7. wildwest

    wildwest Moderator

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    Last night I laid on the floor after I lit the fire, I could not see the front tube but if I put my head on the floor I could see the back two. I finally saw secondary burns. Some were on the left, some on the right, some on this tube and others from a different tube. My guess is that the other times I have studied them the fire was already in full swing, so no off gassing.

    Thanks everybody!
     
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  8. Freakingstang

    Freakingstang

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    WOW I thought mine was hot at 650... I have two magnetic temp gauges, being that mine is an insert I can only read the flue right at the stove outlet and on the face of the soave, right by the door. For a normal hot burn is 600-650 and if I'm really trying to crank it, it hits 675-700. Stove face temp is normally 300ish at 600 outlet temps, 350 at 650-675.

    After having wood smoke dragons my whole life, anything over 500 on the black pipe would make it glow, so when i lit it the first time following the manual and online advice and temps, i freaked out. Dad was over when I lit it and he thought the liner was going to melt when it got to 600. i've never told him with a load of good dry oak or hedge really cranking it hits 675-700. it had me very uneasy leaving the house the first couple times just because it was so much hotter than every other stove I've ever had or used.
     
  9. oldspark

    oldspark

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    Reading the flue temp that close to the stove will be a little misleading, if you have ever read the flue with an IR tester the temps drop off quickly as you go up the pipe.
     
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  10. HDRock

    HDRock

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    Dexter's 850 reading is with a probe thermometer, measuring the temp on the inside of the pipe above the stove, not on the surface so that's a big difference
     
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  11. Free BTUs

    Free BTUs

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    The drier the wood the better, because it will burn hotter which will allow more off-gassing from the wood. One thing I have noticed is that I get secondaries way easier from hard wood vs. soft wood. If I throw in a load of pine the wood just seems to take off in a hurry and it is the wood that is burning instead of the gases. If I load with oak then I get a much better and very visual secondary burn - gas flames coming out of all the holes on the tubes.
     
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  12. Freakingstang

    Freakingstang

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    Yes I have, one foot up it drops almost 100 degrees. I can't measure any higher up due to the insert..
     
  13. NW Walker

    NW Walker

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    I thought you guys might enjoy this view of secondaries in my stove. It's a bit different, but still has that "secondary" look of gasses burning separate from the fuel.

     
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  14. Woodporn

    Woodporn

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    that's darn cool!
    what stove is that/?
     
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  15. NW Walker

    NW Walker

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    Thank you, it's a home made thingy. It's a work in progress, that clip is me playing with secondary air configurations. I thought it looked cool, so I shot it, and it turns out it does a good job of illustrating the concept of burning the gasses separate from the wood. I hope it's helpful.
     
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  16. mike holton

    mike holton

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    from the initial post above.

    one thing with non-cats is to make sure you leave room in the top of the firebox to allow secondaries. if its loaded all the way to the tubes or close to that the secondary air gets diffues around the wood , doesnt generally give good secondaries.

    try a load no higher than the top of the bricks see if secondaries improve with some space up there to burn freely
     
  17. weatherguy

    weatherguy

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    Seems when I load all I can fit through the door on the PH it still leaves a few inches for secondaries, looks like I could easily fit another split or two if I played around with it but I've been leaving it as is and getting beautiful secondaries. I assume they did that on purpose. I loaded at 1 and I'm still getting nice secondaries at 5.
     
  18. fox9988

    fox9988

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    Seconaries can look much different. Even in the same stove. One of my favorite's from the Woodstock Keystone. Volume down;)
     
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  19. weatherguy

    weatherguy

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    They can look different in the same load. I've had the rollers and jets and once the load was burned down I get some like the keystone video.
     
  20. wildwest

    wildwest Moderator

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    Thanks Mike! You just solved my mystery. I have been doing the fires recently (husband= traveling, then flu=me building the fires lol), I don't have it in me to cram as many splits in at a time like my husband does. With his fires, the firebox is so full the flames lick at the baffle. My fires are smaller (apparently below the fire brick) , I finally saw the secondary burn! I am not concerned about aesthetics of the secondary burn but obviously curious about them.

    I am concerned with the frequency of stoking. I fear this model is too small for our needs. We need to stoke it every few hours. We are likely in different situation than a lot of burners, no furnace and a cold windy climate, no hard feelings.

    Any suggestions greatly appreciated :)
     
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