"R D S" wrote in message
...

Maybe if energy prices go sky high a solar thermal system may become
an option for a lot of people. But you'd have to hope that the climate
isn't going into a cooling period and we start getting less sunshine,
and that it pays itself back a bit quicker.

Surely if we have a cooling period there will still be the same amount of
sunshine.

That's right. The temperature isn't all that important. when we connected
ours up the air temperature was 4C and we got a large cylinder full of water
at over 30C in a few hours.

Mary