Classification: UNCLASSIFIED
Caveats: NONE

I'm working on an energy audit for a building with old window A/C units. The average age is about 15 years old. Does anybody know where I can find a good estimate for the efficiency of a 15 year old unit?

I know there is a wide range of efficiencies, then and now, depending on how much you are willing to pay. I'm looking something I can reference and file in my report to show where I got my numbers.

Classification: UNCLASSIFIED
Caveats: NONE