On 12/05/2016 16:35, whisky-dave wrote:
On Thursday, 12 May 2016 15:09:11 UTC+1, Dave Plowman (News) wrote:
In article , Andy Burns
wrote:
Dave Plowman (News) wrote:

It would, of course, be silly to restrict power on a kettle
which is near 100% efficient. And I'll eat my hat if the EU do
bring in a upper limit for them, on the grounds of efficiency.

Why legislate to limit the maximum, why not just mandate an A-F
rating and let people *choose* what they want?

No point really in specifying this on a kettle as they are so close
to 100% efficient.

How do you work out the efficincy of say one of the plastic £5 ones
compared to the £60+ one I brought. (actually I have both, I have 4
tin openers too)

They both convert 100% of the electricity into heat.

The plastic one may have less loses unless the expensive one has extra
insulation.

You can't work it out from the info you provided but I would guess the
£5 one does the job better.