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Posted by George E. Cawthon on October 22, 2006, 10:36 pm
Bob F wrote:
>> Electric? It makes no difference as electric is 100% efficient. Just buy a
>> good quality, standard 40- 50 gallon, or whatever fits your needs
>
> Electric has losses also - depending on the insulation level of the tank.
> 100%
> efficient? Only if you are heating the area with electric heat all the time.
>
> Bob
>
>
It is 100 percent because the efficiency rating is
based on the conversion of the heat potential of
the fuel to the heat potential of the water. Loss
of heat because of poor insulation of the tank
etc. is not part of the "efficiency" rating. And
it has to be that way because no one can predict
or account for all the possible combinations of
installation including outside (no protection),
cold garage, small closet, etc. If efficiency did
include other factors, gas water heaters would
have a terrible efficiency (just think of that
hole through the center of tank and the air heated
by the hot water rising through the flue pipe to
the outdoors.
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