On Thursday, 12 May 2016 15:18:09 UTC+1, Tim Watts wrote:
On 12/05/16 10:47, Brian Gaff wrote:

As for kettles, I do think more efficent kettles can be made, the basic
designs have not changed since the 1950s.

How? 99% of the energy goes into the water with a tiny tiny bit lost in
the lead and through the case.

Have you every heard or seen steam come out of teh spout.
Have you ever touched the side of a kettle.

When you switch a kettle off it doesn't stay boiling for very long does it.