wrote in message
oups.com...
This idea was mentioned in another thread. In principle, if one put an
electric shower on the oputput of a combi, you'd egt even more heat
input to the water, and thus get even more flow rate to give a nice
luxurious shower. And of course, with 2 heating systems in series,
either one can break down and the shower still works.

Is this ever done?
Is it workable?
Why isnt this a common arragement? I realise todays lec showers arent
designed for this, but with a suitable model it looks like a sound idea
at first whatnot.

As others have said, an electric shower is not compatible. Few people are
dissatisfied with a shower from even the smallest of combis. Large flowrate
combis are available, or if you have a low flowrate combi and want a
drencher then add another combi and work them in parallel.

As backup the combi outlet can be run through an instant under unit electric
heater. When the combi is down the electric heat is turned on giving at
least some hot water. Do a Google on IMM for this.

You can have an electric boiler on the outlet of a combi operated by a flow
switch. I don't know what the makers would say. They are tall and thin and
take up little space. But they cost as much as a combi, so may as well twin
the combi's up, and cheaper to run too.





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