My furnace is an AUD080R9V4K, it clearly gives performance data with ESP at 0.9, 0.7, 0.5, 0.3 and 0.1 inches water column. And the performance is approximately linear with respect to ESP, I did not even look for a thing like a label stating a different max ESP.
I will have to look around in my notes for manometer data at 1400 CFM. When this furnace was installed in 2004 we had an old Intertherm AC for which everybody was seriously confused as to the size (Outdoor label had been erased by weather). Perhaps we at one time had it set for 400 cfm/ton and 3-1/2 tons. At some later point my AC pro scrutinized the compressor motor and gave the professional opinion that its size indicated a rather "light" 3.0 ton AC. Then in 2007 it was replaced by a 3.5 ton Trane XE1200 and by that time I wanted 350 cfm/ton (unless there would be a good reason to do otherwise).
If not mistaken I have seen more knowledgeable pros refer to a simple equation which would predict this ESP at 1400 cfm with fair accuracy. Wondering at present if Beenthere directly wants to know or has in mind teaching me something. If the latter what might be the lesson?
Best wishes -- Pstu