TRV's & Room Stat

[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

 

[lame plumber]

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

????????????????????????????????????

 

[derek hunter]

dont agree so if cold draught coming under door the radiator without trv in hall is using huge amounts of energy to reach roomstat temp whereas if trv is fitted based on draughts coming through you would reduce stat temp to make house more comfy
otherwise cold draughts coming in you would set stat higher to compensate then house is boiling no control fit trv where roomstat is solves this prob
simple

 

[dancinplumba]

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

Once again, Sizing rads for heatloss and Balancing lol

 

[dancinplumba]

dont agree so if cold draught coming under door the radiator without trv in hall is using huge amounts of energy to reach roomstat temp whereas if trv is fitted based on draughts coming through you would reduce stat temp to make house more comfy
otherwise cold draughts coming in you would set stat higher to compensate then house is boiling no control fit trv where roomstat is solves this prob
simple

dont put stat in hall, ffs You Dont know what you are doing and need to go back to skool

 

[kozak1968]

You could always zone every room and have stats in each. Or fit the Honeywell TRV zone valves .... Thats if you can convince the customer to part with their money.

 

[SilentMike]

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did i not word that very well?

 

[zzzjim]

The hall way is a bad location if near a front door with no porch.

(But not so bad if you can get in and out of front door without getting hall cold)

If hall way is on south-facing side,it May be compensating for Sun!

 

[Whn1]

Jacko you've only been here 5 minutes, now look what you've done!

 

[dancinplumba]

did i not word that very well?

I bet you put your trv's on vertically dont you ??

 

[derek hunter]

this is great but i still dont have an answer to my question instead i get told i dont know what i am doing well explain why no trv in room with room stat?

 

[derek hunter]

depends if they are on the flow or return i know they are interchangeable but i like to put them on the flow that way you know what is going on efficiency etc it all helps

 

[Mike Jackson]

dont agree so if cold draught coming under door the radiator without trv in hall is using huge amounts of energy to reach roomstat temp whereas if trv is fitted based on draughts coming through you would reduce stat temp to make house more comfy
otherwise cold draughts coming in you would set stat higher to compensate then house is boiling no control fit trv where roomstat is solves this prob
simple

What a load of complete and utter nonsense.

If you set the TRV lower than the room stat then the hallway will never reach temperature and the heating will keep on running wasting heat through the towel rails.

Set the TRV higher than the room stat and it will work as it should and properly regulate the temperature but you run the risk of someone turning it down and going back to the situation above.

Part L of the Building Regs (Conservation of heat and power) states that there must be no TRV fitted to the rad in the room where the room stat is. This is also the advice given by the energy saving trust and TACMA.

 

[Whn1]

 

[lame plumber]

radiator size controls the overall speed a room warms up. a trv controls when to shut the rad down when it reaches desired rm temp rm stat does same as trv but turns off boiler so saves wasting energy when house proved to be warm enough. having 2 temp controllers in rm means they fight each other ie trv turns off rad earlier than temp set on rm stat and boiler keeps running to warm up room but cant, thats simples and how its supposed to work

 

[kozak1968]

Can we all go for a beer now.... oops I,m not a pub member....... I" ll have to wait outside!

 

[derek hunter]

debate is good i will agree to dis agree lol

 

[zzzjim]

why no trv in room with room stat?

The Heating system is meant to be a closed loop feed-back system

The room stat has to see the real temeprature of the water in the system,
via a correctly sized radiator (preferably in a Draught free room).

A TRV will stop the flow of water/Heat --Opening the feed-back loop

Puting Heating into one of 2 states Full-ON or OFF-Early

 

[derek hunter]

so lets do away with trv,s then
putting heating in to one of two states full on or full off NO ONLY A STAT WILL DO THIS VIA A SOLENOID A TRV WILL NOT CLOSE HEATING IT WILL ONLY CLOSE RADIATOR

 

[leethegasman]

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

And if the fire is on the rest of the home is cold ?

 

[derek hunter]

Hence my initial point have a trv where sat is then you have full control