I recently bought a house with a Rheem Model RGGC-125A, Serial CN3D103 F4882 6544. It is an odd looking furnace and I don't think I have ever seen one like it. I don't think I have ever seen a Rheem model starting with RGGC either. I do mostly commercial stuff and refrigeration though, so it could be more common than I think. I would like to replace it this summer or next.
I am trying to figure out what the output rating is so I can figure out the expected efficiency. Since this unit appears to be from 1982, I would expect it to be about 70%?
Does anyone have any info on this model?