Do all non-EPA wood burning stove chimneys smoke when you close the air vent, even if the firewood is dry ?

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Does all non epa wood burning stove smoke when you close the air vent even if the firewood is dry ?

No, you can easily get an old smoke dragon to burn without visible smoke coming out the chimney if you have dry wood and have it adjusted correctly.
 
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Does all non epa wood burning stove smoke when you close the air vent even if the firewood is dry ?
I think so, My experience has shown it will start to smoke very shortly if brought to minimum, especially if you can shut it down completely. Before being introduced to a non-catalytic clean burner around 1990, I always thought wood stoves were supposed to smoke. Smoke is typically removed through secondary combustion based on temperature and secondary air mix. If an EPA clean burner can smoke, I don’t see how a non EPA unit won’t. But there are plenty of other seasoned wood burners on here that will have a definitive answer for you.
 
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Does all non epa wood burning stove smoke when you close the air vent even if the firewood is dry ?
Some stoves are better than others, but unless you leave things burn at a pretty good clip, yes, you will very likely have some smoke.
You can't really do "low n slow" without smoldering, which equals smoke.