"Frank Watson" wrote in message
...
How to make one CH radiator come on and off at set times?
Ideally, I guess I'd like a TRV with a built-in timer - but I guess
that might be unlikely..

So what is the cheapest, simplest way to do it? It's for a bathroom
rad, which I only need on for a couple of hours in the morning.

Thank you

Frank

To achieve this in a perfectly general way you would need to divide your
system into zones - with each zone being controlled by a motorised valve,
and with each valve being controlled by a programmable thermostat for the
zone. The *valve open* contacts from all zone valves would need to be
connected in parallel and would need to switch the boiler and pump on
whenever one or more zones required heat. Within this scheme, your bathroom
radiator would need to have a zone all to itself.

Alternatively, if you want to achieve something more specific, there may be
other solutions. For example, I like my bathroom and en-suite radiators to
get hot for a short period each day - even in the summer - to warm the
towels. I have arranged my system so that these two radiators can be made to
get hot whenever the hot water is being heated (but can revert to being
*normal* radiators in the winter). If this is what you want, come back and I
will make some suggestions about how to achieve it.

Roger