TRV's & Room Stat

[Jacko]

An on going argument beetween my self and other employees if you fit a room thermostat you should take off or change the TRV in the same room as thermostat if it has one other wise the rad will get to temperature but not the room stat. ( Confused my self writing this) i beleive in replacing trv with lockshield valve if a room stat is fitted but am open to other opinions.

 

[dancinplumba]

You are 100% right

 

[Si H]

Yep agreed

 

[kozak1968]

TRVs to be fitted in all rooms except where a roomstat is fitted.

 

[ambrosia]

its seems pretty obvious but so many just put trv's every where including kitchen and bathroom

had a customer complain her flat wasnt getting warm last week, when i went there she had by far the largest radiator in the flat in a small narrow hallway with a trv and the room stat less than a meter above it

told her if she turned that radiator off the rest of the flat would get warmer and i'd come back the next day to move the room stat
went back and large radiator was on full blast

 

[kozak1968]

If my memory serves me correct, you do not require a TRV on a towel rail nowdays?

 

[mfgs]

You are right, no trv on the rad in the same room as the thermostat.

 

[derek hunter]

think about it the roomstat controls an overall temperature ideally around 20, 22 so it may be fitted in hall you dont have trv in hall means radiator is not controllable i leave all rads apart from bathroom with trv,s that way you can turn trv down in hallway to aprox 22 then when hallway reaches temp stat stops calling for heat.
If you removed trv this room will reach temp quicker than rest and stop roomstat calling for heat i appreciate it is a balance that is hard to achieve but allways remember trv,s measure room temp not rad temp
derek

 

[TBServices]

Show them this thread with the true professionals advice

 

[derek hunter]

expand

 

[kozak1968]

The problem you get is if you want the hall warmer than the TRV setting, you then have the roomstat not reaching temperature but the boiler will keep running so wasting energy.

 

[Whn1]

Water does when heated.

 

[derek hunter]

the whole point of room stat is energy saving why would you want hallway more than 22 or any other room more than 22 ?

 

[Whn1]

Surely The main point of a room stat is to control the temprature within a property.

He fact that it can save energy is an additional bonus.

 

[derek hunter]

by definition it is a room stat not house stat but again very confusing and hard to strike a balance but if radiators are sized right all should be good the point is if no trv fitted you cant control radiatoR so if you want rest of house hotter shut down trv then stat will keep calling but once it reaches desired temp will shut off
where as if no trv fitted radiator will have no control and stat will reach temp quick even though rest of house is cold ITS A BALANCE

 

[dancinplumba]

think about it the roomstat controls an overall temperature ideally around 20, 22 so it may be fitted in hall you dont have trv in hall means radiator is not controllable i leave all rads apart from bathroom with trv,s that way you can turn trv down in hallway to aprox 22 then when hallway reaches temp stat stops calling for heat.
If you removed trv this room will reach temp quicker than rest and stop roomstat calling for heat i appreciate it is a balance that is hard to achieve but allways remember trv,s measure room temp not rad temp
derek

sorry but if you are doing this it is wrong and you are not following build regs L1

 

[derek hunter]

Reply is to who

 

[dancinplumba]

Reply is to who

to whomever puts trv on rad where room stat is

 

[derek hunter]

so explain no trv no control stat reaches temp to quick rest of house is cold

 

[kozak1968]

Regulations are there to guide everyone... If we had no regulations we would be in France.

 

[dancinplumba]

so explain no trv no control stat reaches temp to quick rest of house is cold

balancing and sizing and do not put stat in hall way, it should be in a living room

 

[derek hunter]

the french seem to get on a lot better than us still doesnt answer what happens because of no control on radiator stat reaches temp to quick what do you do put room stat up to 26 and burn more fuel

 

[dancinplumba]

the french seem to get on a lot better than us still doesnt answer what happens because of no control on radiator stat reaches temp to quick what do you do put room stat up to 26 and burn more fuel

possibly on your installations, not mine

 

[SilentMike]

why would it reach temp faster because theres no trv?

 

[lame plumber]

the french seem to get on a lot better than us still doesnt answer what happens because of no control on radiator stat reaches temp to quick what do you do put room stat up to 26 and burn more fuel

you dont seem to understand that your talking about the need to size rads correctly, trvs dont allow for speed of temp rise!

 

[Si H]

Originally Posted by derek hunter

so explain no trv no control stat reaches temp to quick rest of house is cold

balancing and sizing and do not put stat in hall way, it should be in a living room

This is how its supposed to be done

 

[derek hunter]

why would stat reach temp eh because you control temp in that room without a trv but you can control overall temp with roomstat so if no trv fitted room has full power of rad into room without control hence heat up to roomstat temp quicker but other room still not at temp

 

[lame plumber]

room stat traditionally put in halls as they were coldest part of house (draughty front doors etc) so when they reached temp rest of house was warm, modern controls now allow for you to have room stat in most used room, ie lounge for most people

 

[lame plumber]

why would stat reach temp eh because you control temp in that room without a trv but you can control overall temp with roomstat so if no trv fitted room has full power of rad into room without control hence heat up to roomstat temp quicker but other room still not at temp

have you had any training in heating and plumbing?

 

[SilentMike]

the other rooms will be at the temp of the trv they dont dictate temp just shut off when at temp and the room is controlled its controlled by the room stat