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

Leodogger

grumpy_codger said:

Let's say you want 37. If the water from the boiler is hotter than 37 the mixer valve dilutes it with some cold water making it about 37. If the temperature of the water from the boliler drops below 37, you will feel it. If it remains hot, then the problem is with the mixer valve.

I already know the answer to that, when the boiler drops in temperature, the shower temperature drops too in temperature from when you get in the shower until you get out, after about 4 minutes when you are getting out it is luke warm !

Leodogger

ComicGeek said:

Leodogger said:

sheenas said:

Helpful to know what boiler we are talking about?

It is an Aparici, Spanish boiler.

That's probably an electric water heater (ie small amount of hot water stored in a vessel), rather than an electric boiler able to instantaneously produce lots of hot water. 5 l/min is a very small amount of water, a typical shower is more like 9-12 l/min.

How much water is stored in the heater? The largest Aparici unit I can see on a UK site (assuming that it's in the UK and not Spain?) is only 100 litres and takes 4 hours to reheat. 

The boiler holds 80L of  water and if I increase the temperature from 48c (which is what we normally leave it at) to 55c it takes about 15-20 minutes to get there which is pretty quick I would say.   It is a brand new boiler and as I said (after I checked online) is made in South Korea.

Albermarle

Leodogger said:

sheenas said:

Helpful to know what boiler we are talking about?

It is an Aparici boiler, manufactured in South Korea.

If I google Aparici, the only results are for a Spanish ceramic tile maker.

grumpy_codger

Albermarle said:

Leodogger said:

sheenas said:

Helpful to know what boiler we are talking about?

It is an Aparici boiler, manufactured in South Korea.

If I google Aparici, the only results are for a Spanish ceramic tile maker.

https://habitium.com/ie/984_aparici

grumpy_codger

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.

FreeBear

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.

Leodogger

Albermarle said:

Leodogger said:

sheenas said:

Helpful to know what boiler we are talking about?

It is an Aparici boiler, manufactured in South Korea.

If I google Aparici, the only results are for a Spanish ceramic tile maker.

If you google where they are made, it comes back South Korea !😁

Leodogger

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.🙄

Leodogger

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.🙄

grumpy_codger

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.🙄

There's no need to ask. It's 2kW - https://brandsnofer.artdigital.pro/814C1523/aparici/P080/