There is no such thing as an electrical boiler. Boiler means to "burn" a fuel.
There have been attempts in the past to have instant electrically heated air, but it is absolutely terribly expensive. The only way to heat by electricity is by using night storage when the electricity can be bought at night on the low rate economy 7 period.
Fuel prices have changed considerably since I last did a cross comparison on fuel costs, but then off peak was by far the most expensive after LPG. As oil is used to generate electricity and gas prices have risen too, I am not sure that anything has changed. It's just all so expensive now and still rising.
My guess is you have to choose between oil and storage heating. Got a coin to flip?
I'd go for an electric combi boiler rather than oil - but you'll have to weigh up the costs if you do not have a personal preference. The installation of the electric boiler will be cheaper (i'd imagine) as oil tanks and boilers are expensive.
Well to be honest Htg that post started as rubbish and went down eh? Lol.
Must admit I have never seen an electrical wet boiler before, but to be honest My opinion still stands. Maybe I am biased against electricity but I can't see how it can work out cheaper than oil especially if you cannot use "off peak" prices for the heating.
I think a very careful look at the property power supply would be necessary because of the amount of current drawn.
In all the domestic and commercial systems I have seen over the last thirty years or so, I have never seen anyone choose electricity for a wet heating over traditional fuels!
Plumbbobâ€™s comments on no such thing as an electric boiler are technically wrong but most houses have a maximum of 100 amp supply and not all of that can be used for heating even if back in the 1950â€™s that was the whole idea behind the 13 amp socket. The night storage heaters were a failure but the modern idea of a heat store does work better but needs a lot of room although it does allow multi-sources for the heating for example solar. Main advantage of electric heating is radian heat can be used which heats the body rather than the air so drafts do not cool you as much as with air heating radian heaters are very common in garages where the doors are often open and air is exchanged and is the big argument against energy saving light bulbs. But there are also some new systems like the sterling engine where electricity is also generated when burning oil and it does become very complex when comparing systems. But in general control is one of the biggest considerations if its cold in the morning and warm in afternoon you donâ€™t want too much delay between asking for heat and getting it or you end up with the heat you paid for in the morning going out of the window in the afternoon. Also the tariff if you get cheap electricity at night it may be well worth using a heat store and also then your looking at timers for washing machines, tumble dryers etc as well and washer dryer becomes better option when run overnight. But then you also get noise from washing machine and house design may make this unacceptable. So with space, and noise plus max power available compared with heat required for size of house it is not easy to plan the best option. I would not think anyone could do it from a remote position like we are. There is also the options of using heat pumps which with larger houses where there is limited electrical power may be well worth while but in a small flat would be not even considered.
Sorry not really answered your question but I hope it will help you make you your mind. Although I have said you have not given enough information to really advise even if you had it would be unlikely anyone would work out the sums for you. First question must be with a max of approx 12Kw (52 amp) over 7 hours could the system cope with heating your house if not then off peak will not work, and with 12Kw 24/7 can it cope with heating house otherwise electric heating will not work unless you use 3 phase supply or a heat pump which will really cost so not really worth thinking about. Most oil and gas boilers can produce double that heat. As to heat pumps which yes can be reversed in summer to cool house they are really well beyond my ken as to all pros and cons.
Hi smoki, only correct answer so far is from htg eng.
there are lots of different electric 'boilers' such as amptech now sold by heatrae-sadia, which come in range from 6-12 kW and are only 150mm square about 1Mtr long and can be 'lost' in the corner of an airing cupboard!! largest one takes about 50A
Because they are relatively 'low-temp.' compared with a gas boiler they are fine for under floor heating systems,
can run two smaller ones , one each for heating and hot water,
or as suggested an electric combi, which I have no practical experiance so am about to follow htg eng's link myself,
I thought the same as you plumbob when I first heard - they wouldn't be much good and too expensive to run - if i didn't know someone that has one i'd probably still think the same. You can't beat gas central heating - but I think this is the next best thing. The way oil prices are going, the price of the oil boilers and oil storage tanks - just too expensive (in my opinion)
Oil boiler around Â£1600
Oil tank around Â£900
radiators, pipework, controls and valves etc
Electric combi Â£1400
For maintenance between gas, electric and oil - oil is the most expensive.
smoki1969 - hope some of this helps with your decision
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