Andy

You're not wrong but I'd still say go for the shower off the combi, it's
far
far better.

Thanks, I'm pretty much convinced to go for the shower off the combi now.

It looks from what IMM said ("You install a pressure equalizing valve.")
that if my thermostatic shower unit doesn't have one of those inbuilt, I
should get one separately?

It would be in the middle of winter in a freezing cold house with no hot
water other than what you can boil in a kettle.

LOL! Yeah, and I live in Scotland where the winters can be pretty cold.
What I meant was I'd rather have the powerful shower which I'll use every
day, with the risk that at some point, the boiler (and shower) will be out
of service, rather than go for an electric with it's poor performance just
so that I'm not scuppered for water if/when the combi goes. And besides,
asking to use their shower is a good way to get to know yer neighbours!

Thanks for your advice.

Eno

"Andy R" wrote in message
...

"Eno Case" wrote in message
. ..
IMM

I don't see any downside whatsoever from running a shower from a
combi.

Maybe I misunderstand how they work, but I'd been led to believe that if
the
shower is supplied from the combi, then for the time that the shower is
in
use, the radiators won't get supplied with water therefore cooling the
rooms down? (And some showers take longer than others... ;-) )
Very true

Also, if the shower is in use, and someone does use a hot tap, the
shower
would be affected somehow, even if it is a good thermostatic one?
The shower will almost certainly slow down as you're drawing off the same
mains as the shower is, whether it cools down or not depends on whether
the
boiler can supply enough hot water to keep the shower and the tap going at
once, probably not.


If these points are wrong, I'll gladly stand corrected, and be even more
keen to get a thermostatic shower!
You're not wrong but I'd still say go for the shower off the combi, it's
far
far better.


I suppose there's also the issue of not having a backup hot water supply
(like an electric shower could give me) if the combi boiler breaks down,
but
that's not a big worry to me.
It would be in the middle of winter in a freezing cold house with no hot
water other than what you can boil in a kettle.

FWIW I had a combi installed a year or so ago, reasonably happy but
wouldn't
even consider it again unless I had a decent (22mm at least) incoming
water
main with decent pressure/flow rate.

Rgds

Andy R