In article ,
Spurious Response wrote:
So to me, the ideal heater for water would be one that does the job
with the least amount of energy in a reasonable time.

Having had experience of a 1kW electric kettle I can tell you it doesn't
take a 'reasonable' time.

--
*Sticks and stones may break my bones but whips and chains excite me*

Dave Plowman London SW
To e-mail, change noise into sound.