<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/#comment-135663>
<http://schema.org/text>
"Maybe because it isn't supposed to be a B vent. Manufacturer's installation specs trumps Code.     Marc \n"
<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/>