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<blockquote data-quote="HatsOff" data-source="post: 7795071" data-attributes="member: 158216"><p>I can't agree with your heating engineer on that one. As an example using slightly pessimistic figures:</p><p></p><p>1kWh of electricity (at 17p/kWh) nets 3kWh of heating so you end up with 5.66p/kWh delivered heat. </p><p></p><p>1 litre of heating oil is 50p and gives 10kWh of heat. Boiler efficiency of 80% so you end up at 6.25p/kWh of delivered heat.</p><p></p><p>This is a simplification - you might have more expensive electricity or a more efficient boiler if you run it at a lower temperature. But my actual numbers for the year just gone is a COP of 4.2 (so 4.2kWh of heat for every 1kWh of electricity used) and was paying 15p/kWh so my real figure for last year was 3.57p/kWh delivered heat.</p><p></p><p>This next year won't be so good but I've got a 17p/kWh deal for 12 months, assuming they don't go bust. </p><p></p><p>Again, the caveat is if its a straight swap and using it as you would a gas or oil boiler, then it might not work. Also you can see the number above cannot compete with mains gas.</p><p></p><p>Edit - just had a look and fuel oil is now 63p/litre round me.</p></blockquote><p></p>
[QUOTE="HatsOff, post: 7795071, member: 158216"] I can't agree with your heating engineer on that one. As an example using slightly pessimistic figures: 1kWh of electricity (at 17p/kWh) nets 3kWh of heating so you end up with 5.66p/kWh delivered heat. 1 litre of heating oil is 50p and gives 10kWh of heat. Boiler efficiency of 80% so you end up at 6.25p/kWh of delivered heat. This is a simplification - you might have more expensive electricity or a more efficient boiler if you run it at a lower temperature. But my actual numbers for the year just gone is a COP of 4.2 (so 4.2kWh of heat for every 1kWh of electricity used) and was paying 15p/kWh so my real figure for last year was 3.57p/kWh delivered heat. This next year won't be so good but I've got a 17p/kWh deal for 12 months, assuming they don't go bust. Again, the caveat is if its a straight swap and using it as you would a gas or oil boiler, then it might not work. Also you can see the number above cannot compete with mains gas. Edit - just had a look and fuel oil is now 63p/litre round me. [/QUOTE]
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