Old Mueller coal gravity furnace with a gas conversion and air handler.
I haven’t seen a gravity furnace since the late 80’s!
The good old octopus
Water heater to the front of the furnace looks around the same circa.
Thanks for sharing.
Duct wrap warning may be asbestos wrap.
Finally a situation where you can insert the word Nuddaaafinga’ in a report…who is old enough here to know what a “clinker” is??
I see these relatively regularly. Older in fact.
I’ve seen quite a few too, always abandoned though. Ive never seen one retrofitted with gas.