Hi there,
I'm trying to figure out the date of an Intertherm gas furnace in a mobile home.
Home is 1981 vintage.
It's a 64,000 BTU furnace , Model MBH 080, Date/Code 18881NGL01

Any takers?
Its probably the original unit, but I'd just like to be certain.

Carrier Blue Book is of no help to me. :(

Thanks,
Rick

18881NGL01

188th unit manufactured

In the year 1981