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The Natural Philosopher The Natural Philosopher is offline
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Default Ballpark figure needed: how many litres heating oil per day

Dave Baker wrote:
"MM" wrote in message
...
Typical new three-bed detached house, well insulated, new oil boiler,
average temperature in most rooms maintained to around 22 degrees C
from 8 am to 10 pm.

How much oil will the boiler consume very approximately in winter in
the UK? 5 litres per day? 10 litres? Much more? Much less?


Average annual usage is reckoned to be about 2000 litres, most of that in
winter of course, so 10 litres per day wouldn't be far off the mark. 22c is
pretty warm though. You could save a lot by turning that down a bit.


Funnily enough, it isn't that much of a difference, and the colder it
gets the less percentage difference it makes.

If the outside temp is - say 15 degrees, then going from 22 to say 19,
drops the temp drop across insulation from 7 degrees to 4
degrees..nearly halving the power.

But at zero outside, its from 22 to 19, - less than 15%.


Since the majority of the oil is burned when it IS that cold, there is
not a lot of gain to be had at all.