Can anyone give some verbiage on this issue.
Rheem 2005 sealed combustion cat 4 furnace installed in an attic room. The combustion intake air vent was open to the attic, not taken outside.
Buyer talked to the village code people and theu said it was OK.
I was always informed that Cat 4 sealed furnaces should take their air from outside.
The attic room had 2 vents to the attic.
Comments to support my arguement?