I really enjoy backpuffing!

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The first couple of times are cool but then it bugs me enough that I gotta get up and push the fuel rod in a little. Usually get another beer while I'm at it.
 
Mines doing it right now, I get mesmerized sometimes staring at the stove, its relaxing.
 
I don't believe that's "back puffing".
More like a diesel thing..lol.

Smoke + pressure + hot cat = POOF!
 
I saw something very similar this morning in my Elm. Blue clouds intermittently erupting towards the glass. Kinda neat but I opened the primary air so at least it was happening at a more steady rate. That's really the coffin edge between combustion and no combustion. If, or when, anything changes the fire could go out. Sometimes conditions improve for combustion and clouds get more numerous on there own.
 
I don't think you consider that "backpuffing". Backpuffing would be where the "poof" is fast enough to blow smoke out through the gaskets.

Anyway, I agree, when you have the occasional lazy clouds of flame that come and go, it's a nice show.
 
It's a build up of combustible gases in the firebox due to low/slow draft which suddenly burns when conditions are right. Occasionally it rattles my intake flapper. If it were more severe it would be a true back-puff, but right now it's just entertainment for me.
 
That kind of entertainment would make it hard for me to sleep.
 
I think it's the backpuffing issue that bothers me the most about cat and everburn stoves. It is normal operation to have an oxygen-starved environment in the main firebox for these types of stoves, and occasional backpuffing. I am tired of a smoke scent coming from the Avalon Arbor whenever it's running. I've seen it puff and then there's a little trace of visible smoke pushed out from the top cover gasket. The gasket seals well, but when you get instantaneous positive pressure inside, there will certainly be some leakage.
 
ControlFreak said:
... when you get instantaneous positive pressure inside, there will certainly be some leakage.

I can't see anything inside my stove, but once I was looking into the secondary air inlet to see if I could see any sign of secondary flames and the stove decided to backpuff right then. A huge plume of hot gases hit me square in the eye. Lucky I was wearing my glasses or it would have been a trip to the ER. As it was, that stunt earned me a trip to the laundry room with some soiled BVDs.
 
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