For my own knowledge:
I know this is a defect because of the 2-3-10 rule. If the water heater flue (B-vent) were raised to be 2’ above the furnace (PVC), would there still be a defect? The water heater would draw correctly, and the furnace is sealed combustion.
If it would still be a defect, why?:roll: Both appliances would work properly.
(None of this is in the report - just wrote it up and recommended an HVAC contractor. Just for me.)