New York State building code for furnace venting?

Toller

The inlet on my 2006 Trane furnace froze up.  I found that the

contractor installed the vent too close to the inlet, and didn't make

the vent long enough; per Trane's installation instructions.  He fixed

the second and sorta fixed the first.



However I also found that

the vent was 11" from an inside corner and 4" from an overhead deck.  I

am told that is grossly inadequate, but Trane simply says to follow

local code on those.



I checked with the local building

inspector.  He says that the only applicable local code is the NYS

building code.  In 2007 that was changed to require vents to be 4' from

inside corners; previous to that it wasn't mentioned.  He finds nothing

on distance from something overhead.



Is that correct?  Was the contractor in compliance in 2006?  I am hoping someone might be familiar with this.

The

inspector is overworked and admits he doesn't know as much as he would

like about furnaces as he would like; so I wonder if he is missing

something.