Bob Eager wrote:

Umm ... at 15 years done, you think its about time you retired the poor
old girl?...

Don't you think rescuing old equipment is one small way of saving energy?

Except that you reach a point where the old equipment actually wastes
energy.

I think the energy used by this machine must be more or less determined
by the temperature it is set to -
I imagine the energy used by the motor is negligible by comparison.
You can set the machine to use less water.
I doubt if there has been much improvement in this technology
during the last 15 years.

--
Timothy Murphy
e-mail (80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland