Thermostatic shower with an ideal HE18 Condenser Boiler

[ChristopherB]

Hi all ,

I am in the process of having a new bathroom installed and have an Ideal HE18 condenser boiler with a cold water tank and hot water tank in the loft.

I have to turn the hot water on to be heated when I want a bath and I currently have an electric shower .


With the new bathroom , I would like to have a thermostatic shower put in as I do not like an electric shower however the sales agent from the bathroom company has said that with my current boiler and system , the thermostatic shower may not mix the water well and has suggested that I have another electric shower installed with the new bathroom at an additional cost .

Is this correct or am I able to have a Thermostatic shower with my current boiler / system ?

 

[Deleted member 120897]

There’s no issue with having a thermostatic mixing shower installed with your current setup. What you need to bear in mind is it will perform better with balanced supplies, and you need to consider the head of pressure (measured from the base of the cold water storage cistern to the top of the shower head, as this will be the pressure available and helps with the flow rate.

An example might be 1 meter from cistern to shower head, this will equal approx 0.1 bar pressure. So you then look at thermostatic mixing showers with this available pressure, and it might state: 3 litres per minute , which isn’t fantastic.

 

[SimonG]

You'll need a shower pump or swap to an unvented cylinder.

For the pump you'll need to make sure it's the right type and you have sufficient cold water storage.
For the unvented you would need to check water flow and pressures.