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Or get quantum storage heaters, they retain heat better than old style heaters and are computer controlled so learn how much to charge up based on ambient temps. You can tell them if you are in or out and program the times to suit you. New ones run on an app (I have the older version) don’t think you can even buy heaters without a proper timer now and you will not get a C grade on EPC
Mr_Smyth-
Check with your energy provider what times the off peak power comes and goes. We've found (can hear the old radio 4 box clunking away day and night) that there are several heating periods, quite a few during day to top up those storage heaters. Would say storage type electric heaters only really relavent if your older (wake up at 5am) and stay home a lot, if your up late and then not home very much, the amount you save off peak/on peak costs is wiped out by heating an empty home.
We ended up just going direct regular electric panel heaters (have a concrete or oil core) as we are the latter category.
BrickMan
@BrickMan @Mr_Smyth - thank you v much - super helpful. I have an older (2013) unvented gledhill. Unfortunately when it was fitted the link to the back boiler on the Rayburn was disconnected.
I think what I want is:
1) remove electric shower and plumb in real shower
2) replace cylinder with unvented with off peak thermostat element - if you run out of hot water, light a fire
3) get an interface that allows the Rayburn back boiler to provide heat to the unvented cylinder, and give me one water-filled heat release radiator.
4) replace the ancient storage heaters on the economy 7 probably with infra red panels, and run them for a bit at the start and end of the night when it is cold
5) get economy 7 circuit extended upstairs to do the same
6) insulate
7) cry in bankrupt