On Thu, 4 Nov 2004 20:34:53 -0000, "IMM" wrote:


"Andy Hall" wrote in message


Please answer the question. How does having an arrangement which
causes a large proporion of the cylinder contents to fall in
temperature to practically cold water temperature increase the volume
of available hot water?

Read the thread all again from the beginning.

No just answer the question.

All is there. I'm not going around the mulberry bush.

Something's there - it's simply conflicting and inaccurate.




For most of the time, the lower thermostat will be calling demand and
the upper one not and there is no way to know with a simple thermostat
arrangement like this whether there is 25% or 75% of HW left and
therefore whether the boiler should be fired up when water is drawn.
This could be handled by having separate plumbing runs for the bath
and shower and having the flow to those monitored.
Otherwise the arrangement will be worse overall than just having a
single thermostat with its hysteresis. You will fire up the boiler,
every time the hot tap runs at all, whcih is precisely what you didn't
want to happen because it's less efficient (or so you say).

I don't think you thought through the implications of your solution
before suggesting it.

Read the thread all again from the beginning.

That isn't necessary. By avoiding the issues, you've answered my
questions.

Read again. This is for your own good.

No, it's OK, thanks, the situation is completely clear.




--

..andy

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