Are TRV valves / room thermostat compulsory with new boiler on existing system ?

[Lostloop]

What are the current regulations about fitting TRV valves if a new condensing boiler is fitted to an existing (vented) system. Are they compulsory ?
Is a room thermostat still required / compulsory ?
Thank you for any responses.

 

[tamz]

It is to comply with building regs and is best practice but it cannot be enforced.
You can lead a horse to water but can't make it drink. If the customer can't afford them or insists on not having them there is nothing anyone can do.

Why?

 

[Reg Man]

Part L building regulations. New or replacement boiler installs require building regulation certification, which under the competent person scheme you will self certificate to say it complies. No roomstat and it dont comply. So you can't certificate the install, or do you certificate the boiler anyway to say it does not comply? Gets confusing. If it were me I would not touch a job, which I could not complete properly, bacause it always tends to come back and bite you on the bum, wether your in the right or in the wrong.

 

[Roger Welton]

Some boiler manufacturers will give you an exemption if you fit a weather comp system for the heating (thinking viesmann here), may be cheaper than trv's and room stat.

 

[R1CKY]

Last time I checked, I'm sure it was only bedroom rads that had to have TRVs. Or did I imagine that?

 

[Roger Welton]

Part L asks for all rooms apart form room containing Room thermostat

 

[stevetheplumber]

i f the customer doesnt want them i just say no to the does it comply question in the log book

 

[doitmyself]

Read carefully the Domestic Buildings Compliance Guide 2010; it's all in there!

An Interlock has been a requirement for a long time; this is normally provided by the room thermostat.

TRV's are not mandatory when just the boiler is being replaced; see the Supplementary Information at the bottom of Table 2 (page 24).

There is NO requirement to split the heating system into two zones if all you are doing is replacing the boiler; see Zoning Requirements

 

[michael c]

does this mean then that a boiler should no longer be fitted with just a mechanical clock?

 

[dancinplumba]

does this mean then that a boiler should no longer be fitted with just a mechanical clock?

no for along while

 

[Roger Welton]

Next you'll be telling us a gravity hot water loop is no longer acceptable

 

[dancinplumba]

me ? never !!

 

[AWheating]

boiler interlock is important, as for trv's i suggest them and do what im told

 

[michael c]

thanks, i have only been installing prog room stats anyway however know a lot of people who are still fitting mechanical clocks. not suprised however as so many retailers are offering them in packages.

 

[R1CKY]

I often fit mechanical clocks, like the drayton SM1, especially for OAPs who can't get to grips with a digital timer.

 

[stevetheplumber]

clock and roomstat is acceptable for part LDOESNT HAVE TO BE PROGRAMABLE

 

[Hobo128]

Last job I did I was told regs where that you need trvs on all rads up stairs and a stat down stairs

 

[michael c]

all except bathroom hobo, but you ant force the customer to have them

 

[R1CKY]

Last job I did I was told regs where that you need trvs on all rads up stairs and a stat down stairs

This is what I was told too, when I was studying for some energy efficiency course.

 

[Hobo128]

Thats right, apart from the bathroom rad.