On Mar 16, 9:35Â*pm, " wrote:
On Mar 16, 8:36�pm, ransley wrote:





On Mar 16, 7:27�pm, Don Wiss wrote:

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 www.donwiss.com (e-mail link at home page bottom).

Most efficent is tankless since efficency is misleading, the Energy
Factor is what has the most meaning in water heaters , gas tanks of
regular vent and 80+% efficency are around 50-60 energy factor, i dont
know about direct vent though, tankless start around 80 energy factor.- Hide quoted text -

- Show quoted text -

tankless have lots of downsides, from delay when you fiorst draw water
till heated water arrives, to poor operation at low flow levels.

standard tanks actually have very low standby losses, just got touch
your tank hot hot is it?

current hoigh efficency condensing tanks are over 90% efficent. that
should be enough for anyone- Hide quoted text -

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Hallerb , have you used a tankless, no I will bet not, you put them
down because you cant afford one and have never used one. The delay
in hot water arriving might be 5 seconds longer than a tank since it
fires in seconds. 90 % efficent , yea the burner is, so how can you
explain 50-60% Energy Factor on tanks and 83-90 on Tankless. As I said
thats more of a true efficency rating, so what if the tank isnt hot,
what do you think goes up the middle of the tank and out the chimney,
heat!