"Andrew Gabriel" wrote in message
.. .
In article ,
"Christian McArdle" writes:
The problem we have is the usual one of losing the hot water upstairs
whenever a hot tap is run downstairs.

With this number of bathrooms and outlets, your average instantaneous
combi
won't be keeping up if you use multiple outlets at the same time.

You'll need either one of the following:

2. Get a storage based solution.

This could probably be added to current boiler, perhaps retaining
the combi hot water for nearby usage, or the upstairs shower where
higher pressure than loft tank might be an advantage, and using a
hot water cylinder for everything else.

Or just add another combi and spit the outlets amongst the combis. Musch
simpler and cheaper.