Robert, I found a post of yours from a few years back in which you stated:
Unimpeded airflow isn't the main concern. All furnaces have an exact amount of return airflow that is needed to operate as designed and lessen wear and damage to system.
It cannot be more or less airflow, but must be the same.
It was in regards to someone wanting to cover their furnace "alcove".
Anyway, I don't understand how a burner can have too much air flow. Doesn't it just simply draw the amount of air it needs?
In other words, an electrical analogy might be, "More available amperage is fine, as the circuit will only draw what it needs".
I ask as it's in relation to air flow and the sound proofing I'll be installing when the furnace is moved. That is, if code allows the chimney bend.
EDIT: Never mind. In a later post in the thread, you said:
In rereading my post, it didn't get worded as I wanted in that too much air is not a likelihood as that is less and not totally open as before.