Any thoughts as to which is cheaper, in general, to heat domestic water -
electric immersion heater or oil
fired boiler. I used to think the electric would be
more expensive but with all the price changes going on
over the last few years I've now no idea.
Is there some formula to work out the relative costs if
you know the cost of a unit of electric and a litre of oil?
Someone did this in here some weeks ago.
You should be able to get a value per litre in kw hours for your
particular oil and make an adjustment for the efficiency of the boiler
and the figures compare directly.
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