3 phase, 3 bed flat

[brewlab]

Hello all,

I have been asked to fit out a couple of flats and I think they require a 3 phase supply, my friend thinks they will be OK on single phase. There will be no gas supply to the property.

3 bed flat will consist of......

3 x 9.5Kw Powerstream instant water heaters (2 bathrooms and a kitchen)
5 x 2Kw thermostatic panel heaters
1 x 500w bathroom heater
1 x 6.5Kw Hob
1 x Kitchen ring (oven powered by this circuit)
1 x ring for bedrooms and living room
And the usual lights (pendants only) and smokes

The two bed will be same apart from one less powerstream and 2 less panel heaters.

What do you fellas think?

 

[Andy78]

I think i'd be asking someone to design a combi heating solution based on an electric boiler and compare it for viability against the cost of a three phase supply. Prospective energy bills included.

 

[Darkwood]

Without knowing your KVA allowance or supply size and/or the availability to upgrade the single if needed then we cannot really comment, as you have no 3ph loads as such then there is no real requirement for having a 3ph supply, the load balancing over phases will only benefit the DNO and will be subject to there network conditions.

 

[brewlab]

I think i'd be asking someone to design a combi heating solution based on an electric boiler and compare it for viability against the cost of a three phase supply. Prospective energy bills included.

I agree, but you haven't met the developer/landlord. He's very single minded and wants everything done as cheaply as possible, I don't think he is concerned with the bills the tenants will receive.

 

[brewlab]

Without knowing your KVA allowance or supply size and/or the availability to upgrade the single if needed then we cannot really comment, as you have no 3ph loads as such then there is no real requirement for having a 3ph supply, the load balancing over phases will only benefit the DNO and will be subject to there network conditions.

The DNO has not yet installed the supplies to the flats, I'm trying to get hold of a name and number from the developer/landlord so I can have a chat with them and ultimately try to arrange a meeting on site.

 

[Leesparkykent]

A cylinder with immersion heater or even twin immersion and size the rads specifically to each room so every rad is not 2KW would probably be a start.