On a recent home inspection in Aurora Colorado, our company, Magpie Property Inspections, inspected a home built in 1953. Unbelievably, the home still had the original gas furnace unit manufactured by American Furnace Company! It operated, and we did not detect any gas leaks or carbon monoxide emitting from the combustion chamber during operation when checked. Needless to say, our recommendation was that it was time for this one to go. Finding someone to service and repair it would be nearly impossible let alone getting replacement parts. As you can see from the photos, it has been a very long time since it was serviced. Our client intends to renovate the home and replacing this old guy heads the list of things to be updated. Furnaces can operate a long time if they are maintained regularly and checked by a qualified technician, but after 20 to 25 years, it is a good idea to move on to a new unit.
If there is a furnace hall of fame out there some where, this one should be enshrined in it.