Here’s my thought. Most of us don’t use wood burners. So our fires are regulated by controlling air flow, not by controlling fuel quantity. We load those suckers up, and then either set up a snake, so the fire has to burn slowly, or set a damper, so that the lump burns slowly. It’s all about sustaining a flame front. You set your dampers, your fire hits, lets say 250*, and holds.
So, when you throw a couple-three-four chunks of hickory, or apple or pecan on, you lifted the lid, and of course your temperature dropped (it will rebound, of course). But also, the wood doesn’t immediately start burning at the same temperature as your flame front, And, you added fuel! So what you get is the gray smoke, which is wood burning at a lower temperature. As the chunks heat up, they start burning white; that’s the water vapor "burning" off. Then, when that’s done, you get your thin blue smoke.
Now, I’ve found that the smoke turns blue when my pit temp nears 220* in my BGE, with the plate in. I don’t know what the fire temperature is, but I’m sure the wood is over 212*.
I’m okay with putting my meat on the fire while the smoke is white. 5 or 10 minutes of that is no big deal, IMO. But the gray smoke is asking for trouble.
White smoke:

Blue smoke:
So, when you throw a couple-three-four chunks of hickory, or apple or pecan on, you lifted the lid, and of course your temperature dropped (it will rebound, of course). But also, the wood doesn’t immediately start burning at the same temperature as your flame front, And, you added fuel! So what you get is the gray smoke, which is wood burning at a lower temperature. As the chunks heat up, they start burning white; that’s the water vapor "burning" off. Then, when that’s done, you get your thin blue smoke.
Now, I’ve found that the smoke turns blue when my pit temp nears 220* in my BGE, with the plate in. I don’t know what the fire temperature is, but I’m sure the wood is over 212*.
I’m okay with putting my meat on the fire while the smoke is white. 5 or 10 minutes of that is no big deal, IMO. But the gray smoke is asking for trouble.
White smoke:
Blue smoke:
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