Those are some seriously bad figures they have there!Very unhelpful bad maths and scaremongering from the new statesmen who are saying WTF will end as it'll now cost £30 a day.
My work laptop uses at most 45w, I'm sure most work laptops are similar and they don't always use this full power.
That's way overboard for how much energy to heat a flat, and in anycase people will probably just be heating the one workspace room.
It won't be anywhere near £30 a day, and even if it was my 35 min train ride into london is £26 a day anyway
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I use an oil filled one when working from home to heat that room, I don't like the kind of air fan heaters give off. But it's more on low to take the edge off than keep it warm.
A desktop PC (with monitor) less than about ten years old won't be using anywhere near 300w.
Stats I have to hand right now are a desktop, two external disks, a hub and wireless extender using 30w total (screen plugged in separately but max 30w it says on the sticker on the back) so 60w absolute max. On for eight hours = 0.24kwh.
And their heating costs are for a blast furnace!
The kwh rating for boilers is (as far as I am aware) and always has been an 'up to' figure, not what the thing would burn through in an average hour of normal operation.