Can you run a Thermostatically Controlled Shower from an electric boiler system?

FreeBear

Leodogger said:

FreeBear said:

grumpy_codger said: With such boiler it makes much more sense to have an electric shower that can be more than 10kW.

ETA: why do you not set the temperature higher than 55? Set it to 80 and this will significantly reduce the HW demand by the shower.

An electric shower would make more sense to me too. You can get thermostatic models (I have a Triton T80 - Works a treat for me). Quite a bit more expensive than a bog standard shower, but the thermostatic control makes up for it.

If you are in a hard water area, whacking up the boiler temperature to 80°C will increase the amount of scale being deposited.

to be honest and I don't know why but electrical shower units like the one you mention don't seem to be in plentiful supply in Spain.   I looked for the Triton showers on Amazon here in Spain and it bought up a couple of showers units only.🙄

Ah, OK, so you are not in the UK.

Mira do a thermostatic electric shower, and you might find better availability in Spain, but.... You will need to check to make sure that your electrical supply is up to the task of running a 8.5-10.5kW shower. If you are rural, you might be limited to 5kW max for the whole house.

casper_gutman

Leodogger said:

grumpy_codger said:

I checked some 100L Aparicy and its power is pathetick 2kW max. Even electric kettles can be 3kW. So, basically you rely on the volume of the water already heated and not diluted when topped up (in the boiler) with the cold water.

With such boiler it makes much more sense to have an electric shower that can be more than 10kW.

ETA: why do you not set the temperature higher than 55? Set it to 80 and this will significantly reduce the HW demand by the shower.

This boiler was put in by a Spanish plumber and he said they are one of the best!   I will ask him what kw power it is because I am not sure.   This is the boiler we have :  https://www.aparici.es/P080/termos-electricos/gama-plana/p/P080.

I can set the boiler higher than 55c but I would rather have a shower that I don't have to keep remembering to turn the temperature up and down on.    I may have to resort to having a straight forward electric shower unit instead but having just laid out 160 euros for this one, we will have to stick with it for a while.🙄

I'd have thought the best setup with a lower-capacity electric water heater like that would be to set the output temperature high (e.g., 80° as suggested by @grumpy_codger) and then blend the hot water down at point of use. So, you wouldn't be turning the temperature up and down, the boiler would always output water at (say) 80°, and this would be safe because all taps would have a thermostatic mixing valve for blending the water down to a suitable safe temperature.

Let's not reinvent the wheel here, though. If people typically use these sorts of electric water heaters in your part of Spain, and don't have electric showers, then how do they get a decent shower?