Oil combi - Mixer shower

[Ziggur]

Please may I get some advice from the plumbing experts here.

Time for a new shower enclosure.

I want to replace my aging electric shower with a good thermostatic mixer supplied from a Worcester OIL Heatslave combi boiler.

I have looked at all the major brands and examined as many Installation Manuals as I can find. All of them state that the combi MUST be "fully modulating". Further research indicates that there are very few (if any) domestic oil-fired combi boilers that modulate - mine certainly does not.

My bath mixer tap works perfectly OK and I'm sure that If I stuck a high pressure bath shower mixer on the bath then that would also work. So why do a need a fully modulating boiler to supply a shower "tap"? All I want to do is to connect two water pipes to a mixer and have the water come out of a tap with lots of small holes in it!

Any help on a work-around would be very welcome.
(A new electric shower is a last resort because I would need an electrician to install an MCB and he wouldn't like my wired fuses and I'll end up with a complete rewire.)

TIA.

 

[simond]

No oil combis modulate, not mainstream ones anyway. I think the Germans have them but their oil is different.

I cannot see any reason why you could not fit a thermo mixer to an oiler. Unless they are worried about the hot supply modulating the cold. This would imply the cartridge reaction time was slow.

In which case have you tried investigating the instructions for a continually thermistor based variable mixer like the Aqualisa Quartz range?

 

[Ziggur]

Thank you Simon.

Food for thought. I'm off to follow up your Aquilisa Quartz lead.

Mike