On Sat, 22 Nov 2003 10:10:51 -0000, "IMM" wrote:


"Andy Hall" wrote in message
news
On Fri, 21 Nov 2003 19:56:53 -0000, "IMM" wrote:

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


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. 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.


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.





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..andy

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