"Dermot O'Loughlin" wrote in message
om...

Quite wrong. In a changable climate UFH requires a decent control
system,
otherwise it can be caught out, being either too hot or too cold. One
which
anticipates the fall or rise in temperature, as outside weather
compensation, is the best.

This would reflect the information given to me by a friend who has
recently built a house and installed UFH. She said that if given the
option again she would go for rads. The point she made was that it was
too hard to control. She said on an average day in spring or autumn
she would need no heating during the day but would like to turn it on
as required - in the evening time or at night. She said the lack of
responsiveness of the UFH meant that she always needs to plan ahead -
she could get caught out too easily having the house too hot or too
cold. Maybe it's because she does not have the correct controls to
effectivly manage the system.

I am just coming to the conclusion that our climate does not really
suit UFH. We have a long winters but in the main they are fairly mild
- rarely do we get extended cold snaps that may require a heating
system that does not need to be responsive.

Your assessment is pretty correct. Although UFH can run quite well with
appropriate controls. It also has to be designed and installed correctly
too. If this is wrong it is irreversible. All the control in the world will
not put it right.

I would advise your friend to have someone advise having some extra controls
on her system, preferable with outside weather compensation. It will not be
cheap, but in her case necessary.