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Posted by Speedy Jim on November 8, 2006, 6:24 pm
dennise9@charter.net wrote:
> OK, here's a real simple (aka dumb) question.
>
> We have two identical residential side-by-side (80 gallon?) gas hot
> water heaters located in the basement. Both were installed together and
> are about 3 years old. They are connected in series. There is a
> (passive) recirculation loop connected betweent both tanks and
> somewhere on the thidr floor.
>
> What is the recommended temp DIFFERENCE setting for this setup? Say
> tank #1 gets the input cold water from the street and tank #2 supplies
> the hot water to the house.
>
> #1 temp higher than #2 ?
> #2 temp higher than #1 ?
> both temp set the same ?
>
> Some considerations are:
>
> A. operating costs
> B. tank life time
> C. recirculation loop operation
>
> There are only two people in our house so recovery is a lesser issue.
>
> A plumber once said to set tank #1 (the street tank) temperature lower
> than tank #2 to get a longer life time from tank #1.
>
> Recommendations ????
>
> Dennis
>
Good grief! 160 Gallons of water heater??
Turn the gas off to unit #1. Keep as a spare.
Jim
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