Re: {Disarmed} New Remote Controlled Thermostatic Electronic Radiator Valve

[Wayne Harrison <Wayne@xxxxxxxxxxxxxxx>]

Hi all,
I might be having a real thick here (more than likely!)) - I'm no plumber,
=
not even allowed after the 'christmas eve incident' - i digress=85

Our heating system has one central thermostat in the hallway that governs
i=
f the boiler is active or not. There is also a timer to set the thing to
co=
me on and go off at two times during the day or there is a manual override
=
to just turn it on or keep it off.

When its running - its the single thermostat that actually governs the
heat=
ing. My question being - if we had these fitted to the radiators do I need
=
to just turn up the thermostat to its highest temperature to effectively
na=
il it on? If I do that - what stops the boiler from just burning more fuel
=
as it doesn't think its getting the house up to temperature? Doesn't sound
=
like a saving there to me=85 but as I said - I'm no plumber - or heating
ex=
pert :-)

Thanks=20
Wayne.=20


On 15 Aug 2011, at 19:15, Vargster wrote:

> Neil,
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> Yes, I was just thinking the same thing. If you have an old boiler,
you m=
ay
> be able to save the large percentages they claim, but when a
condensing
> boiler starts modulating (due to higher returning water temperature),
the
> efficiency drops badly, probably wiping out most/all of the headline
> 'savings' made by the TRVs. I deliberately undersized my new boiler so
it
> runs at full tilt more of the time...
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> Lee
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> On Mon, Aug 15, 2011 at 6:05 PM, Neil Spellings
<lists2@xxxxxxx>wro=
te:
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>> **
>>=20
>>=20
>> On 14/08/2011 22:08, Mark McCall wrote:
>>> Chalmor have launched a new remote controlled thermostatic
electronic
>>> radiator valve designed to save on gas or oil central heating
costs.
>>=20
>> Hmm...I'd be interested to see how much gas/oil would actually be
saved.
>>=20
>> If my boiler is firing and heating the water for other rads in the
>> house, then with a condensing boiler efficiency is increased when
the
>> temperature differential in the return is higher (i.e. you have
more
>> demand, lowering the return temperature).
>>=20
>> Closing TRVs and isolating more rads would increase the return
>> temperature, thus making the boiler less efficient. The boiler
would
>> still be firing (but perhaps not as hard?) and pumps would still
be
>> running.
>>=20
>> What do others think?
>>=20
>> Cheers
>>=20
>> Neil
>>=20
>>=20
>>=20
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> [Non-text portions of this message have been removed]
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> ------------------------------------
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