Here is a unique situation regarding a water heater, natural gas supplied, natural draft with combustion air supplied via a duct from the large, vented attic. 1996 townhouse and this is the original water heater. There is a closet in the bedroom, at the rear of this closet is a second closet in which the tank is located. This closet is not a dedicated enclosure as the entry door is not fire rated or self closing. I don't know the rating of the wallboard. It is definately a storage closet, not a utility area. How is it that this was approved by the AHJ, it likely exists in all of the other units (over 50 t-houses)? Opinions? Click to Enlarge 39.31 KB Click to Enlarge 60.54 KB