Are room Thermostats mandatory?

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To the OP... no roomstats are not mandatory the building regs dont require one to be fitted as per hobhead.
It is an interlock that is required and it all depends which boiler you have whether a roomstat is the rquired method of achieving this
 
OOI, what benefit do you think you would gain by not having one?
 
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edited

What is a boiler interlock ?
BRECSU* define a boiler interlock as ‘a
method of interconnecting the system
controls with the boilers to ensure that the
boilers do not operate when there is no
call for heat’. Very simply, a boiler
interlock is a control or control system that
ensures that the boiler can only fire when
there is a real demand. This means that
fuel is only used when it is required, none
being wasted.


:confused: so how can you determine if there is, or is not, a call for heat without a room stat :?:
 
Here is clue 1: Though I have heard about them, I have never actually seen one
 
It is a bit ass about face, but you could take one rad and stick two lockshields on. :D
 
nope, I still don't uinderstand.

On a hot day, the room stat would prevent the boiler firing on Heating. How would a rad with two lockshields prevent the boiler firing when the rooms are up to temp, but cause it to fire if the rooms get colder?
 
An interlock stops the boiler from firing if there is not call for heat.
Some people simply stick trv's on all the rads to safe gas, which means that when all the trv's are closed, the boiler will cycle like mad.
If one rad has 2 lockshields, there will always be a demand for heat, whether needed or not. You can compare this with a roomstat set for 38 degrees with an indoor temp of 35; there is a technical demand.
 
but this does not correspond with

BRECSU* define a boiler interlock as ‘a
method of interconnecting the system
controls with the boilers to ensure that the
boilers do not operate when there is no
call for heat’


:confused:
 
but this does not correspond with

BRECSU* define a boiler interlock as ‘a
method of interconnecting the system
controls with the boilers to ensure that the
boilers do not operate when there is no
call for heat’


:confused:
Yes it does.
With at least one rad permanently open, there is always a demand for heat.
In stead of adjusting the controls to turn the boiler off when there is no demand, you create a perpetual demand.
Probably not what they had in mind, but it fits the bill; the boiler will not be on without a demand for heat.

In case you are wondering; no, I don't think it is a brilliant idea
 

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