On Fri, 17 Sep 2004 13:35:31 +0100, "IMM" wrote:


"Andy Hall" wrote in message
.. .


You can work out how long the water will last from the store - about
90 litres when mixed with cold accounting for a 6 minute shower at
15lpm. After that, it drops to 11lpm

Oh my God more mentalist. The store stores water at least at 60C, we shower
approx at 38-40C as the water is being drawn off the boiler is
simultaneously re-heating. You have been told this so pay attention.


I did, and I also produced the complete calculation demonstrating how
poor the performance really is.




how much did your
boiler and store cost?

Boiler and cylinder together were about £1800.

My God! a house gas supply can give 212 cy foot per hour. Yu can buy two
combi's that consume close to that figure giving about 25 litre/min. And no
cylinders and a backup if one drops out. Lateral thinking me boy.

It is bad practice to use deprecated units. It is even worse to mix
them.

Your suggestion would produce 22lpm of warm water at 40 degrees and
require the entire supply to do it, leaving nothing for other
appliances.

It would still need roof storage in my case and seemingly in a lot of
other people's cases as well and still not protect against a failure
in either the electricly nor the gas supply.

In short no redundancy apart from appliance failure.

I have complete backup for all services and appliances and can get
superior performance so there is no point in worsening that.




I can run two showers or a shower and a bath very quickly and not have
to worry about them going cold or taking an eon to fill and run.

Two combi's consuming 20 cu foot/hr will pour the water in me boy, pour it
in.

Trickle, more like.


So two Alpha CB 50s would be well within a domestic gas supply

Right on the edge and requiring upgrade to run anything else.

and give you
showers in abundance and NEVER run out of water,

unless any single one of the services fails.

and no tanks or cylinders
and natural,CH zoning of one down and one doing up.


I don't live in a one up, one down.


..andy

To email, substitute .nospam with .gl