In article ,
Doctor Evil wrote:
To have good bath filling performance as well, you need either a
commercial size combi,

There are domestic high flow combi's.

Depends what you mean by high flow. It means nothing unless supported by
figures that give a real world comarision.

or some sort of storage based solution, which can be a "one (larger)
box" solution,

Which is called a combi.

or a two part cylinder and boiler solution.

In a flat you don't want that.

Not everyone lives in a flat - even those on council estates.

Builders/renovators of estates are likely to go the instantaneous
combi route, as it costs much less to install.

Any one bopx solution is cheap, and quicker, to install.

All that seems to matter to you. Most would be more concerned about
performance at the end of the day.

There is also less to maintain.

--
*Change is inevitable, except from a vending machine.

Dave Plowman London SW
To e-mail, change noise into sound.