Should I have a Room Thermostat fitted on my System?

No you don't need it for one zone you need it for zoning ie zones plural .
Now you are splitting hairs!

Don't forget that the Guide considers Hot Water to be a zone. If you have a combi boiler, you might get away with no thermostat as you can't have CH and HW running at the same time. But if you have a HW cylinder, you need a valve controlling the flow through the CH zone, otherwise the rads will get heated every time HW is heated. This valve will need to be controlled by time (programmer) and temperature (thermostat).
 
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Not splitting hairs at all just pointing out that you and CBF are WRONG to say the regs say you MUST have a roomstat.
There is no point reading half the regs and then saying it applies to every installation .

And no point bringing the HW into it as that cannot be controlled by a room stat .
It has to be controlled by an interlock which in majority of cases would be a cylinder stat and a motorised valve and that would called an interlock.
The regs you have read clearly explain this and how a combi would be regarded

At least you answered for your self unlike CBF who seems to have trouble reading
 
Not splitting hairs at all just pointing out that you and CBF are WRONG to say the regs say you MUST have a roomstat.
There is no point reading half the regs and then saying it applies to every installation .

And no point bringing the HW into it as that cannot be controlled by a room stat .
It has to be controlled by an interlock which in majority of cases would be a cylinder stat and a motorised valve and that would called an interlock.
The regs you have read clearly explain this and how a combi would be regarded

At least you answered for your self unlike CBF who seems to have trouble reading

I am sorry if my working day has interfered with feeding your ego, i do love people like you that has to argue with everyone & anything & have to prove that you are smarter than a 10 yr old (sorry noel) except it doesn't wash with me at all cause i don't give a flying f... what you think,

yes you are correct that a boiler interlock could be provided by a compatable boiler management system but most boilers don't provide the facility to use one anyway, however most people don't live on the USS Enterprise, if you read table 2 page 15 (below) you will see that a wired temperature control is req & the best, easiest & cheapest way is to fit a room stat therefore to 99.99% of the people in this country a room stat is req & of course trv's don't provide that

http://www.planningportal.gov.uk/uploads/br/BR_PDF_PTL_DOMHEAT.pdf
 
Make up your mind a page ago you said i didnt have a clue what i was talking about now you say i am correct.
Well last time i looked the baxi solo HE looked nothing like the uss enterprise and is in fact a pretty bog standard basic boiler that has a part on it that cost about a tenner its called a flow switch .
but if you want to make it sound complicated and call it a boiler management system then carry on .
Or to be more precise you have not got a scooby about basics.
SO go and put that shovel back in the shed before you fall in the hole you are digging :rolleyes:
 
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well i'm glad you brought up a flow switch, however this works by having trv's on all the rads & when they close down the flow switch detects no or very limited flow so shuts the boiler & pump down, then checks now & again to see if the trv's have opened to allow a heating flow, except that trv's on their own do not provide suitable temp control to comply with the regs.

next point ?
 
Thats not too bad only took ya 40 minutes to google it keep on it tonight you may learn some more basics.

Who said trvs by themsel;ves meet the regs cant see that anywhere on this thread so there you go again making things up to suit your lack of knowledge
 
hold on let me check the time, only 3 mins alapsed oh ok what the hell, not bad not bad only took you 29 mins to read through the thread to see if anyone meantioned trv's, ok i'll play along, so how in your view would a flow switch work to provide a wired temperature boiler interlock without trv's & a room stat,

i'm listening
 
What bit of must HAVE an interlock do you not understand .
Show me where i have said trvs alone can provide it
Or where i have said trvs would not be incorporated in providing an interlock.

Do you really have that much trouble understanding what has been said.
I will type a bit slower for you to try and help .


An interlock can be provided by fitting trvs to every rad and with the boiler incorporating a flow switch that turns boiler and pump off .
No roomstat would then be required and this would fully comply with the regs and and makes your thoughts that a room stat MUST be used as wrong.
Is that simple enough for you to understand :rolleyes:
 
take your time, taken from the honeywell site or are they wrong as well ?



Building Regulations Part L 2010
FAQ Sheet
Every home must be divided into at least two heating zones.
Living and sleeping areas (zones) must be controlled at different temperatures by means of a thermostat.
In larger homes, these zones must also be controlled at different times.
Every home must be divided into at least two heating zones, using a thermostat controlling a motorised valve.
If the house is smaller (less than 150m2), then these can be controlled by the same timer.
If the house is larger (more than 150m2), then each zone must be controlled by its own timer.
Every radiator should be fitted with a radiator thermostat, unless it is the reference radiator for a thermostat (i.e. the radiator where the room thermostat is fitted).
All heating zones are required to be under the control of a room thermostat and motorised valve, with radiator thermostats fitted to all radiators (except the reference radiator).
This is a new requirement for all homes where the Building Regulations are applied.
The heating must be divided into two heating zones under separate temperature control for homes with a floor area less than 150m2. This means the same time programme can be used for both zones, but separate room thermostats and motorised valves are required for flow control.
For homes with a floor area greater than 150m2, full time and temperature zone control is required.
In all instances, a room thermostat can be replaced by a programmable room thermostat.
An automatic bypass valve must be fitted.
This FAQ sheet is for guidance only and at the time of production represented the latest information available to Honeywell fromvarious sources. Honeywell reserves the right at any time and without notice to change any product, specification or any other information contained in this publication and cannot accept any responsibility for loss or damage arising out of any errors that may inadvertently be contained herein.
EN1H-2535 UK01 R0811
honeywelluk.com
When do the new Part L regulations come into effect?
The new Part L comes into effect from 1stOctober 2010.
There is a new Domestic Building Services Compliance Guide that gives details of what is required. The main requirements for Boiler Interlock and time and temperature control are unchanged.
What is new in Part L 2010 Building Regulations?
What does this mean I need to do?
How do I wire in the system?
Smaller than 150m2
Larger than 150m2
Two temperature zones & independent hot water
Three independent zones
 
Gentlemen, please :eek:

If the op ever does come back, would you advise a room stat?
 
NO not every home what about an open plan bedsit with a couple of rads this cannot be split up into zones so yet again you talk ##### not every home is the same so the reg does not apply that is why you read the ENTIRE reg and work out what is required for the property you are working in and what is required .
It took you long enough to try and find what suited your point of view but unfortunately for your customers you do not have the intelligence to actually work out what is required for each individual property and what is fitted /to be fitted in those premises.
When you actually understand the regs and that not all premises are the same i may drop my intelligence and get into a debate with you BUT its not really fair that i show you up for the google searching fool you are .

*********

*********
 
And no point bringing the HW into it as that cannot be controlled by a room stat.
You have missed the point entirely. I wasn't talking about how the HW was controlled but how the CH would be controlled where you have a hot water cylinder.

1. You need a valve on the CH circuit, otherwise the CH will come on very time HW is called. This can be either a zone valve or the CH port on a mid-pos valve.

2. You need a method of controlling that valve so it only opens when heating is required. The only way I know of doing this is a timer and thermostat.
 
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well if you are still here under what ever name you are using today i will reply, i suppose i should have guessed you were a tangentier & trying to divert peoples minds away from your incorrect answers,

you said you don't need a room stat= proved wrong.

you said use a flow switch = proved wrong, as the only way a flow switch could control the heating is if all the rads have trv's & as we know trv's can't be used as a boiler interlock therefore the flow switch idea won't work.

you were the one that brought up a flow switch therefore to make it work trv's are needed i never said you brought up trv's but yet again you are trying to divert people away from the fact you are wrong.

no one said anything about zones, all i did was post the honeywell info in it's entirety, so i'm not sure why you brought that up ? oh of course more diversions.

i do feel sorry for your customers (if in fact you do heating because at this moment i'm really not sure) because you must spend more time trying to convince them that you are right & everyone else is wrong than you do actually doing the job
 

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