"IMM" wrote in message
...



A real cheap solutions is to create a manifold and have all the rads
flows
off this. Each rad has a 2-port zone valve (cheap at £12 at BES) and
each
rad hasn electronic wall stat.

This only goes half way, though. With a simple wall stat I can't say
that I want my bedroom at 18C between 10pm and 11pm, and 20C between 6am
and 8am, and that I don't care what happens in between as long as it
doesn't go below 5C.