Dave Plowman wrote:

Andy Burns wrote:

Even if all 220 million EU households bought a new vacuum that used 400W
less than their old one and used it for 2 hours a month, it would still
be 2749.8 TWh

So even less point having a light bulb that saves 40 watts?

Except most homes have a dozen or more light bulbs, some may be on for
hundreds of hours a month ...

And you seem to be making the common mistake

I'm making no such mistake, see where I say "even if"? that's to
emphasise that I realise they haven't, but that I'm willing to explore
what the maximum saving would be if they did.

that people are being forced
to rush out and buy a more efficient vacuum, which they're not. So why are
you so against them having a more efficient one available when they do
need a replacement?

Because I am familiar with the vacuum I've had for many years, it has
variable power, and for some tasks I use it on max, so whenever it needs
replacing, I'd like one that is as effective as this one, the efficiency
I care about less.