<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/#comment-135678>
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"Here is one from Rheem that is induced draft rated for use with b-vent.http://www.rheem.com/product/residentia ... uced-draft     Bottom line is you have to check out the instructions to be sure they used the correct vent pipe. \n"
<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/>