<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/#comment-135745>
<http://schema.org/text>
"These are relatively new and pretty expensive, but you get good efficiency without some of the problems of tankless water heaters. I have read some complaints that incoming cold water can dilute the tank temperature and give you less hot water than the specs claim. I talked a neighbor into buying one instead of a 75 gallon with a typical recovery rate. I never get around to asking how they like it (they still talk to me though). \n"
<https://www.inspectorsjournal.com/topic/16195-water-heater-vent-near-wall-fan-assisted-draft/>