Electric heating boilers

helaus

I am considering changing my oil heating system (we don't have gas where I live) to electric boilers - I'll need 2 boilers each 10KW - but am concerned about costs - at an average electric tariff of 10 pence/kilowatt hour that means they'll cost about £2/hour when running - this seems a very costly heating system - could be £20 day - have I done my calculations correct.

Biggles

My mother had electric boilers fitted (and she was also told she needed two, even though it was only a three-bed semi) and you're right, they are prohibitively expensive to run. I wouldn't consider them for a moment in place of oil.

macman

Oil around 6p per kWh-you do the maths. Plus the cost of replacement system.

HappyMJ

helaus wrote: »

I am considering changing my oil heating system (we don't have gas where I live) to electric boilers - I'll need 2 boilers each 10KW - but am concerned about costs - at an average electric tariff of 10 pence/kilowatt hour that means they'll cost about £2/hour when running - this seems a very costly heating system - could be £20 day - have I done my calculations correct.

Close. They won't running at max for the whole 10 hours except only on the one worst possible day of the year. If they run half the time then it's still £10 per day though but you'd only run it for 6 months while it's cold so about £1,800 per year then if you cut your usage to an hour or two in the morning and 3 or 4 in the evening only (5 hours per day) you could cut heating down to £900 per year.

They are too expensive to consider. If you have oil already then stick with it.

dunloadin

Another thing to consider is the load on your metering if you have 2x 10Kw heaters running at the same time (approx 80A if my sums are close). Leaves you with not a lot to play with assuming you have a 100A main fuse, if its an 80A (or less) fuse you may have problems!