Just to clear the air, Kenton was sure the WH data plate would Identify the FVIR WH. Not so fast. Here is the data plate from my recently installed WH.
Don’t see those letters anywhere, however a little web sleuthing turned up this:
from an AOSmith product description: https://www.hotwater.com/lit/spec/res_gas/AOSRG45201.pdf
so all you need to see is that ANSI Z21.10.1 rating on the tag. That is the standard that identifies FVIR compliance rating. ALL Water Heaters manufactured after 2005 in North America are FVIR rated!