I recently bought a home and I want to find out the age and efficiency
of the furnace (the owner was unsure or didn't want to say). Anyone
know where I can find this info? The furnace is at least 15 years old,
so their website doesn't have any info on it. The model is
394dac048125 and it is a series FA29. It is a 125K BTU gas furnace.
Any ideas on age efficiency? Thanks.

John