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heating a whole flat this way would be inadvisable. You want an electric boiler heating water for wet radiators.
Out of interest, what makes electrically heating water then pumping it around better than electrically heating the floors?
The later should be maintenance free and much less of a headache to install and use but obvs. if it costs 10x to run or something…
Howard-
It's a bit of a longevity issue. Never run into an issue myself, but it's got a reputation for failure. I'd be nervous if it was my primary heating method.
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Maximum cop on electric heating will be a theoretical 1.00
With a HP you should be getting c. 4.00.This means for every 1kw of electricity put into electric UFH or radiator you will get 1kw of heat.
With HP for every 1kw of electricity put into your HP you'll get c.4kw of heat energy.
draughts
Nahguavkire
Speak to a qualified supplier & installer.
Heat pumps are obviously a no-go if it's a flat, and an internal ASHP would be a terrible idea - they're not quiet and you'd be sacrificing valuable floor space to a noisy metal box...
Electric UFH would be good for heating a bathroom (Schluter do a good ditra-mat combined soultion), and you could also put in an electric-only heated towel rail, but heating a whole flat this way would be inadvisable. You want an electric boiler heating water for wet radiators.