On 11 May 2021 at 08:05:42 BST, "The Natural Philosopher"
wrote:

On 10/05/2021 21:59, George Miles wrote:
as recommended by someone on this group
i bought a Breville
which only heats a cup full of water
and so is quicker than heating a pint
and also saves electricity,
maybe enough to pay for itself!

it will, several times over if your household's kettle habits are anything
approaching what I see.

Points:
1/. The amount of energy needed to heat a cup of water - or two or three
- for a minute - pales into insignificance beside the amount needed to
heat a house 24x7...

it's still a saving.


2/. Any waste heat heats the house anyway so its juts equivalent to a
bit of electrical or other heating you didn't need.

3/. Only an ArtStudent„¢ would say 'maybe' - the rest should have enough
theoretical knowledge to *work it out*.

E.g. there are ~250cc of water in a mugful. Average UK water temp is 9°C
and boiling is 100°C.

so that to boil one cupful takes 250 x 91 calories = 2.275 kcal =
0.00264582

At a cost of say 17p a unit, the cost of boiling one mug = 0.045p per
cup approximately.

So if you make 4 cups per day the cost of making them will be £0.65p per
year. Maybe the kettle might pay for itself in 100 years, but it wont
last that long..

And if you were to scale that up by 60m-odd, that's quite a lot of energy


PS it is also possible to not fill a kettle to the brim.

+1, if only . . .

--
Cheers, Rob