"RzB" wrote in message
...


Many thanks - excellent advice - I'll do that right away..
Of course if anything goes wrong... I'll say you told me..:-)

It was a seriuos question. When set to zero they stay shut.
Are they designed to stay open at their max setting?

Yes I know, sorry, couldn't resist.

It's a question that I haven't given much thought to and is really of
academic interest only unless you've got money to burn! I would think that
the answer would vary depending on what make of stat you have, and how hot
the rad can make the room.