Preliminary advice/information regarding hot water supply

[peweuk]

Well it looks like the electric showers are out of the equation. (At least using more than one is)

I spoke to our Suppliers engineering department who gave me some surprising information.

They said that domestic mains supply is only guaranteed to a maximum of 15Kw !!!!!!. (Although by my calculation with a 100A supply fuse this should carry at least 22Kw max), and the only option to run more than one 10Kw shower simultaneously is 3 Phase. However, because of the rating of our local transformer which supports our cottage and next door, this would require upgrading and the cost would be thousands rather than even hundreds.

So I think what we will have to do is to go with mains thermostatic showers and a 300ltr cylinder fed by a pumped 100gallon breaker tank, and allow for the possibility that I may need to add a further secondary breaker tank at a later stage if needed for extra volume. (We have the space to do it and adding the second tank would be relatively easy).

 

[Agile]

The fuse rating is not an indication of the maximum power that can be taken from the supply.

Larger transformers have considerable thermal capacity and can accept a considerable cyclic overload for a short time.

There is also the diversity between you and next door.

As what you are now thinking is what I have suggested it all sounds good!

Tony

 

[peweuk]

Thanks for all your input Agile.

On further investigation I have come across these which may be suitable as a large breaker tank.

I have contacted the manufacturer for confirmation of suitability.

Thanks again.