On Sun, 27 Mar 2005 09:48:18 -0500, someone wrote:

They could be plumbed in parallel, rather than series.
Not a good arrangement IMHO. Unless you also install
a wasteful circulating loop(s), the cold water in the
line between the heaters will always be introduced
into the Hot supply for one end of the house or the
other.

What he said, if you are going to have heaters at each end, the
purpose of which is to avoid delay in getting hot water at the two
widely spaced use points. If you want to have two heaters in series
to increase the total storage, you will lose the original purpose of a
tank close to each use point. And if you try to parallel them and
keep the original purpose, it aint never gonna work right because you
will not get an even flow from both tanks when drawing from one end of
the house or the other.

If you pick 2 heaters each close to its point of use, that's what you
picked. Otherwise to get total capacity, put two in either one
central spot, or else favor one end over the other, and understand
there will be a delay, unless you use a circulating system.



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