"Jaques d'Alltrades" wrote in message
...
The message
from "Franz Heymann" contains these
words:

It's called solar heating with heat storage. Or if not using heat from
the
sun heat pump systems can take it from the environment directly.

But unfortunately the price of a heat pump is so high that the money
spent
in amortising it might as well be spent buying electricity ot paraffin.

You can make a heat pump for no cost at all, or very little - assuming
you can find someone with an old freezer they don't want.

That will deliver around 50 to 100 watts, which is just about the amount its
motor will need to run, so you might just as well not bother with the whole
fridge. Just install the motor and switch it on permanently. Or, easier,
just run a 100 watt bulb permanently.

Franz