Interesting burn holes produced by primary air inlet

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Nick Mystic

Minister of Fire
Feb 12, 2013
1,142
Western North Carolina
Last night when I did my final reload the split in the front of the stove shifted and ended up nearly pressed against the doghouse in front. I generally leave at least a half inch space between the air inlet holes and my firewood so that the air can enter the stove freely. By the time I noticed this it was too late to try shifting the wood back a bit, but I wasn't overly concerned since I could about an eighth of an inch gap and air would be able to get in. A while later when I was turning down my primary air I noticed four distinctive round holes about an inch in diameter lined up with the four holes in my doghouse. I couldn't get a real good photo since I had to keep off the flash to see it, but the holes themselves show up well.

[Hearth.com] Interesting burn holes produced by primary air inlet [Hearth.com] Interesting burn holes produced by primary air inlet

I could see the air shooting into the stove and when it hit the face of the split it ignited the wood sort of like a reverse blowtorch! Fire shot out of the holes, which eventually grew to be about an inch deep in the split. Pretty neat looking I thought.
 
My Englander NC 30 does this from its single doghouse hole. Very noticeable blowtorch effect as I usually run E/W loading on the bottom layer. Fun to watch when the stove gets going before turning down the primary intake :)
 
Woodstove tunneling machine?
 
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