Unvented cylinder with no system boiler?

[Davidalexjeffs]

our client does not want a gas fired system boiler but he wants to keep his hot water storage. Its currently open vented via an old back boiler. The back boiler has been removed and electric rads installed

So can we install an unvented system without a gas boiler? The cylinder to have x2 3 kw immersions.
Is this ok!?

Is there a better alternative?

Dynamic and standing pressures good
Flow rate 21 plus

 

[townfanjon]

Yes you can , lots about.

 

[gingalig]

You will still need a G3 registered plumber for the install.

 

[SimonG]

Direct unvented cylinder.

No gas available?

 

[Chuck]

So can we install an unvented system without a gas boiler? The cylinder to have x2 3 kw immersions.
Is this ok!?

How big is the house? How many bedrooms and bathrooms?

 

[king of pipes]

Yes you can but best to be on a economy tariff with your energy provider it can work out expensive way to heat the water . Kop

 

[Riley]

Not the cheapest as above check out available tariffs

 

[Chuck]

Another point is that you need to get an electrician to confirm that that the electricity supply cable can handle the proposed extra load. If the supply and/or house wiring is not already up to the job, upgrading can be very pricey.

 

[Best]

Maybe consider the option of other heat sources in the future - gas or solar, so would need coils to suit

 

[quality]

Could try a thermodynamic panel system

 

[Mark K]

Another point is that you need to get an electrician to confirm that that the electricity supply cable can handle the proposed extra load. If the supply and/or house wiring is not already up to the job, upgrading can be very pricey.

Agreed.

Each heater element is going to take about 13A, so the house wiring is probably OK for THIS load, BUT there are electric rads, so a total load calculation would need to be undertaken, to make sure, as you say it is OK for this EXTRA load (caps aimed at the OP).

I would suggest each element should have a dedicated feed from the DB. These would need to be 20A, probably using 2.5mm cable. You could but a 32A feed in, probably 4mm cable, maybe 6mm, and split locally, but there would need to be some local protection if you don't want to be connecting 32A protected cables, ie the 4mm or 6mm, into the immersion heaters. I also suspect the manufacturer would specify protection lower than 32A.

To be fair that would probably be cheaper than a boiler. My concern would be recovery time and running cost.