"John Rumm" wrote in message
...
IMM wrote:

to give some heat in the house and DHW too.
Combine the outlets for DHW and
all the baths you want very quickly and no
waiting. It will do two showers
no problem at all. A win, win, situation.

While there are attractions to a two
combi system, to describe it as a
win win situation would be a best misleading.

One factor you always seem to ignore
when presenting this argument is
the cost of installation.

That is the point, it is cheap to install, with no zone valves, etc.

While the cost of the boilers may not work out
costing much more than the cost of a larger boiler,
it is going to cost getting on for double the
amount to install.

Absolute nonsense. If anything it will be CHEAPER to install. In an
existing system, separating the system to upstairs and down may in some case
prove problematic, but in most system the upstairs and downstairs are two
separate loops.

This is a TWO zone setup. If you wanted the same from a single boiler it
would be more complicated and the same applies to the pipework runs pof
both.

In many cases the cost of
installing is significantly more than
the cost of the boiler.

Absolute nonsense !!!!!

If you go for two boilers on
different floors, then you also need to
find a place to install the second - in
many properties this is not a
trivial task.

You can put them both together One,or both, can go at the back of the
airing cupboard, still releasing tons of space by the redundant cylinder.

You are going to be paying to have
two boilers serviced
annualy as well.

You can always get a deal with two boiers when they next to each other.

There are advantages and also disadvantages
of any setup - a win / loose situation.

The two combi setup, has few disadvantages and the only one you picked up on
is the increased cost of servicing, which is not a great amount. The Junior
doesn't even have a 3-way valve making it more reliable. Every other point
you raised was wrong. Two Worcester-Bosch Juniors cost from under £100 to
around £1100. Giving approx 21.3 litres/minute. Go and find a single
boiler that can do that at that price. The ECO-Hometec, although a
condensing boiler, can go to 22 litres/min, but at just under 2K for it.
And when it is down no heat or hot water, unike the two combi setup.