"Andy Hall" wrote in message
news
On Sat, 22 Nov 2003 11:02:45 -0000, "IMM" wrote:


"Andy Hall" wrote in message
.. .

You can have a small instant electric water heater on the outlet of
the
combi for backup, installed under a sink, at the back of a
cupboard,
etc.
takes no space.

Yesterday, when I suggested that idea, you poo-pooed it.

You suggested a "storage electric heater" in place of a no lag combi
(no
internal storage vessel or keep warm exchanger). Which is very
different.

No I didn't. I simply suggested the electric
heater as a solution to be fitted near the point
of delivery - I didn't mention the combi at
all.

The thread/point was about combi hot water delivery lag.

.. and I suggested a reasonable solution for it.

A silly one when combi's are available that eliminate this problem. the OP
was after a "new" combi, not attempting to rectify a problem on an existing
unit.

Even with water stored in a combi, there is still the cool
water in the pipes between it and the point of use.

That is the case for any water system, cylinder or not. A combi is
generally located in the kirchen near the most used tap, so less dead leg
draw-off.

Having a storage heater in-line and using it to reduce the lag to the
taps,
will not entail using a hell of lot of electricity as the water in the
electric storage vessel would be replaced by hot water from the combi.
It
will use electricity to re-heat as it cools.

That could be done, and I didn't exclude it in what I said.

That "is" what you said.

I know what I said, and it was quite clear.

However, the electric heater would be filled
with cool water from the pipes
even in this case, so I don't think that it is that big a win.

An "instant" in-line electric heater is for backup in case the combi is
down.

Pretty useless, even if a moderately powerful one requiring heavy
grade wiring were used. A poor backup compared even with a cylinder
plus immersion heater.

Some electric instants can manage two taps. It is for backup for a day or
so when the combi is down. Not everyone can have an unnecessary large
cylinder.

Best have an "instant" electric heater on the combi outlet as a
backup,
then
it will do a shower (well at least get you wet and washed).

I'm glad you qualified that.

All of this does strike me as additional reasons as to why combi
boilers are rather limited in function and performance.

You really haven't a clue have you? A reduced lag combi will perform
just
like a cylinder system in speed of hot water delivery and even better if
the
combi is in the kitchen.

I didn't say that it wouldn't

The instant in-line electric heater is for backup
only. Got it? I doubt it!

A rather silly suggestion.

What suggestion might that be?

And England have just taken the lead against the Aussies 17-14.

In fact England won. Try and keep up.....

I wrote that when they had "just taken the lead against the Aussies 17-14".
Duh!


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