I'd like to switch to a direct vent water heater. Looking at the A.O. Smith site I get confused with all the models. Efficiency information is hidden. There is no convenient chart to distinguish the models. It would seem that these are my choice:
ProMax Closed Combustion Power Direct-Vent ProMax Power Vent (C3 FVIR) Power House Sealed Shot Power Direct-Vent Power House Power Shot Power-Vent
But I can't figure out what is different. Plus each of the above has variants.
So, what is the most efficient 50 gallon tank water heater with the longest tank warranty? The run would be about 40 feet and will have a bunch of 90 degree bends.
Don (e-mail link at home page bottom).