Rob,
you could be right about the 'Bleed' or 'Dump' radiator in
normal situations but back in the 1983-84 Winter "We" had no
electricity for nine days and my dump radiator was the only one
working. I was giving hot water away to the neighbours and throwing it
down the drain. After three days when the house started to cool right
down I moved my bed next to the dump radiator and was glad I had
installed it.

Our lounge, with the Bont ESSE in does get real
warm............... nice.

Aberdeenshire and 24 inch think Granite walls.

Chris.