"Dave Plowman (News)" wrote in message
...
In article ,
ARWadsworth wrote:
With an immersion heater pretty well all the input energy is converted
to
heat. If it isn't - where does it go?

Some of the energy makes noise. It must be a fraction of 1% but I can
usually hear them when they are switched on. The rest makes heat.

Yes. I'd guess it also produces light of a non visible frequency too.

I cannot see that happening :-)

Still at least 99.9% efficient though.

Adam