It would appear that, for a conservatory, building regs says:
"any fixed heating installed should be separate/independent to that in
the main dwelling".
or similar. Anyone know where I can find the *detail* of what this
means in terms of requirements?
"People don't buy Microsoft for quality, they buy it for compatibility
with what Bob in accounting bought last year. Trace it back - they buy
It means "on it's own timer/thermostat" - ie a separate zone.
In practise this could be achieved with an extra zone valve, or if the
conservatory will be heated at a subset of times of the rest of the
house, one of those funky radio controlled "TRV" style radiator valve
heads plus a matching timer/stat - see Conrad, they have lots of that
stuff. Or a 2-port valve "hanging off" the existing system rather than
The latter is probably the easiest way to hack it onto a current system.
What they don't want to see is the place being heated unnecessarily.
It simply means that it must not be heated as a part of the rest of the
house, but must be a separate heating zone.
So either an independent heating system (e.g. heat pump aircon), or a
separately zoned circuit on the main heating its own stat / timer etc.
This will probably give the answers:
As we're in an AONB we'll need planning so we'll let the architect
argue that one out with BC. We'd prolly be happy for it to be a subset,
as the boiler's downstairs and the zone valve is upstairs - and the
bathroom it's in has just had all new floor with underfloor heating and
self-levelling and all that, so not about to rip that up to add more
The flow/return for the downstairs rads pass across the threshold
leading to where this conservatory will be. Easiest then will be to tap
off those for rads in the conservatory. In which case a
radio-controlled TRV may well be the way to go.
Neither do we :-)
"The idea that Bill Gates has appeared like a knight in shining armour to
lead all customers out of a mire of technological chaos neatly ignores
[Default] On Sat, 17 May 2014 11:16:21 +0100, a certain chimpanzee,
For a conservatory to be exempt (amongst other requirements) the
heating system of the dwelling should not be extended into the
conservatory (Regulation 9 via Regulation 21(1)). In other words, it
should either have no heating, or a separate heater.
If you do extend the heating system into the conservatory, it is no
longer exempt from the Building Regulations. You can still have a
de-facto glazed conservatory provided that the heating system has
independant temperature and on/off controls (i.e., a separate
thermostat, TRV, etc.).
If it has an independant heating system (e.g., an electric heater),
then it also has to meet the guidance in the Domestic Building
Services Compliance Guide, i.e., efficiency, controls, etc.
BTW, don't bother looking up Regulation 21; it's the most badly
written convoluted piece of prose you'll ever have the misfortune to
read. It's a reverse Turing Test; if you can understand it you ain't
"If no-one on the internet wants a piece of this,
My BCO said (basically) "Pah - conservatory - don't care, nothing to do
with me" (I was asking if he wished to inspect the method used to build
over a run of 110mm foul drain, which I'd made sure was being done by
And if you do the "right thing" and stick an external Part L compliant
door between the house and the conservatory, really no one cares what
you do after that.
I've seen enough conservatories with no doors - which goes to show how
little anyone actually worries :)
The reason for the questions: Who's going to care?
But for your own sanity, bills wise, Adam's programmable TRV would
probably be the simplest solution and give you the change to keep your
bills down :)
On Sunday, May 18, 2014 9:27:12 AM UTC+1, Tim Watts wrote:
I can see it being useful indoors, but for a conservatory its not a suitabl
e control system. 21C heating day after day in a conservatory is a crazy wa
ste, and the timing periods of 1 or 2 times at 21C are simply not suitable
to what is a relatively little used space.
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