On Mon, 23 Jan 2006 21:40:54 +0000, Geronimo W. Christ Esq wrote:

That may involve ensuring that an appropriate mains ring is
available. Would it be really stupid or non-compliant to try to get
away with hanging it off the same ring that the immersion heater is
on ?

I doubt that the immersion is on a ring but on a 15A fuse or 16A MCB
radial. I'm fairly sure there is nothing wrong, regulation wise, with
taking a feed for the CH/HW system from that radial via a suitable
switched fused connection unit. However if a fault develops in the
immersion that requires it to be isolated you also loose power to your
CH/HW... Immersions do go faulty.

This is probably a stupid question, but is a room stat worth
bothering with in the first place, when TRVs are in use and
installed ?

Recent building regs say that when nothing is calling for heat the
boiler must be forced off. This is so that it doesn't cycle just
keeping itself hot, thus wasting energy. With a full TRV system you
can probably do this with a flow switch but the pump has o keep
running through a bypass of some sort, then balancing that flow
against a "demand" for heat as a TRV opens may become an issue. Easier
to fit a wireless programable room stat in your main living room and
take the TRV heads off the rads in that room. The TRVs and room stat
will "fight" if you don't.

--
Cheers
Dave. pam is missing e-mail