On Thu, 20 Nov 2008 17:12:49 +0000, Stephen wrote:

Hello,

I was wondering whether to put the bathroom rads on a separate CH
zone, rather than connecting them to the upstairs zone. I'm thinking
this way I could heat the towels in the summer without heating the
bedrooms.

Is this a good idea? If so, how would I control the 2 port-valve?
Normally I would use a thermostat but can you use thermostats in a
bathroom? I'm thinking not because of (i) electrical requirements
(unless outside zone 2 or wireless) and (ii) wouldn't the humidity be
an issue?

Would you just run the circuit off a timer? Could I use TRVs or would
TRVs switch off the rad when the room was warm but before the towels
were warm?

Thanks,
Stephen.

I have separate 2-port valves and timer/stats for every room (it really
does give a flexible system!) I've had no problems with the bathroom stat
in five years (and with three kids having baths and no extractor, the
humidity is high!)

Safety wise, the stats are battery powered and I have them switching 12V
relays supplied by an isolating transformer with earthed screen - as well
as making the system safe for the bathroom, it also allows the use of alarm
cable for neat installation in rooms that are already decorated.

Steve W