Age?

[nbhi (Gary Schering, II)]

Whirlpool furnance
s# H90892443 I believe it is 1990?

[mnahrgang (Mark Nahrgang, C.R.I.)]

The serial number shows the age based off the letter… G=1970, H = 1980 then add the next numeral. H9 = 1980 + 9 = 1989. The “08” is the 8th week.