I should have mentioned both water heaters are gas fired and 50 gallons
and they're both right next to each other (practically touching).
The hot output of one heater goes into the cold input of the other.
There is a hot-water recirculating pump on the output also that allows
any of the five bathrooms in the house to have hot water within ten or
I will read all that is written here until I understand what the design
goal was in the first place (and what then to set each temperature at).
They are clearly set up in series.
I just want to know why anyone would do this and what I should set the
heat at (both are currently set at 130 degrees) for each.
There is also a hot-water recirculating motor (which runs frequently).
On Tue, 22 Mar 2011 02:40:49 +0000 (UTC), Aaron FIsher
No reason for this setup except to heat 100 gallons of water in 2 50
Maybe the expense of a 100 gallon tank makes it more economical to use
If you don't need all this hot water you could turn off the gas on the
one closest to the cold water supply and kill the electric to the
If your water supply is cold the first tank would act as a tempering
tank and would usually give you a longer duration of hot water from
the active tank.
Or completely disconnect the first tank and hold it as a spare.
Sounds like your system is working as intended to heat 100 gallons.
Up to you how economical you want to be.
Heating and keeping hot 100 gallons of water has costs.
On Mon, 21 Mar 2011 21:54:51 -0500, Vic Smith wrote:
The water is pumped out of the ground from a well and then kept in two
five thousand gallon tanks. So, the cold water is probably just a bit
colder than outside air temperature. I never noticed it being
particularly cold (it never freezes here) but I never thought about it
Fot the use it is set up for I would set the first (tempering) tank
lower than the second tank, or as mentioned previously, shut it off.
Having it TOO low just encourages bacterial growth, particularly if
the hot water demand is low.
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