Economy 7/ off peak or not?

[sythai]

Hi All

After some advice please, going through plans on possible job. House converted into flats.

All electric (no renewable, gas, oil etc.)
Heating all UF via 'slim jim' bolier 4kw.
Water via 2 x 3kw immersions.

Should I suggest eco7/ off peak.
Wasn't sure if it would be worth it for just the immersion ?

To be honest, only ever dealt with existing eco7, not put in as new.

Thanks Sy

 

[TJ Anderson]

No. Definitely not worth having economy 7 just for the immersion heater.

 

[sythai]

No. Definitely not worth having economy 7 just for the immersion heater.

Thinking that might be the answer Keeps things much simpler then if so

 

[TJ Anderson]

4kW slim jim is a bit mean haha.....how much floor area is your UFH?

 

[buzzlightyear]

if they have a lot of money to burn why tell them .

 

[static zap]

if they have a lot of money to burn why tell them .

If they have , can you get 2 supplies in ?
a) One ECO7 --never used at higher day rate.
b) Other fixed rate --- used mainly during day.

 

[sythai]

how much floor area is your UFH?

Not sure of top off my head...they're only small 2 bed flats

 

[Deleted member 26818]

Economy 7 works, because storage heaters heat up at night, then release the heat during the day.
If you were to use it for UFH, wouldn’t the floor just be warm at night, and cold during the day?

 

[suffolkspark]

Just a heads up the heatrae sadia and santon versions tend to be available cheaper....

Ive had success installing these in conjunction with a sunvic timer - cant remember the model, but you can have 24 on/offs a day ie each hour segmented, uaed in conjunction with economy10, you can program to those times to get it up to temperature at cheap rate and keep the body of the house warm at cheap times, then when it overlaps onto high rate its already up to temperature.

4kw does sound small though...

 

[sythai]

If you were to use it for UFH, wouldn’t the floor just be warm at night, and cold during the day?

was on about it for the water