"Sue Begg" wrote in message
...
In message , Mike


We have been thinking about geothermal underfloor heating and possibly
using a domestic windmill to power the pumping. Reading this thread has
given me something to think about. Does anyone know if the small
windmills have a cut off if the winds are strong?

Yes - the clutch lets go to stop over-driving.

Because here in the
NE Scotland our winds are usually strong and it would seem silly to
install a system that is not going to work when it is cold and windy and
the heating is really needed.

I think they first try turning away from the wind to calm down the spin so I
doubt if you will lose much. I doubt if in a hurricane your heating isn't
the first thing on your mind :-)