How old?

I have a carrier condensor with the ser.# 2095E25746. What numbers do you look at to get the age. Does any one have a source sheet that tells you the ages of different makes and models of condensors and furnaces.

May 1995. First 4 numbers: 20th week, year

Here’s one:

and another… http://inspectapedia.com/heat/Furnace_Water_Heater_Age_Charts.pdf