Apparently, this has worked this way since day one. It’s a mid 50’s house. I believe the water heater should connect above the furnace vent into the chimney. The listing agent says the buyers just had the furnace checked by an HVAC guy before they purchased the home warranty, and didn’t say anything. I say the HVAC guys weren’t concerned with the water heater venting, they were checking the furnace.
Both drafted okay with smoke test.
Do I write it up anyway, or let it go?