Dude, sounds like you qouted right from GAMA.Originally posted by wyounger
125k in, 100k bonnet capacity means 80% efficiency running at steady state under perfect conditions. Calculating from bonnet capacity is by no means equivalent to AFUE, which considers standby losses, startup losses, etc. In other words, real world conditions.
Hell, I'm not even a pro and I know that. So maybe somebody should go back to fourth grade furnace class
But you are perfectly correct. There are many other things to consider than just dividing input by output.