Now, I am not familiar with temperature's effects on the reactions found in burning wood. However, your invocation of chemistry is misguided at best. Chemical r

Now, I am not familiar with temperature's effects on the reactions found in burning wood. However, your invocation of chemistry is misguided at best. Chemical reactions CAN and DO vary based on energy input into the system. Reactions can happen one way at normal wood fireplace temperature, but another way in an efficient burner at higher temperature. Not to mention that higher temperatures can also simply burn away compounds that lower temperatures cannot. They can also vary based on outside inputs; for instance, wood burned without oxygen becomes charcoal.