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The Importance of Radiator Balancing for Efficient Heating: Introducing the Flow Regulating Valve

 
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Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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Mars
 Mars
(@editor)
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Joined: 5 years ago
Posts: 3394
Topic starter 01/08/2025 7:25 am  

@adamk what I like about these valves is that once set, your rads for rooms are set and shouldn’t get “unbalanced”.

For those interested, in these valves, if you decide to go ahead, DM or email me, editor@renewableheatinghub.co.uk and I’ll send you a code for a 10% discount.

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 JamesPa
(@jamespa)
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Joined: 2 years ago
Posts: 2721
01/08/2025 7:53 am  

Posted by: @adamk
↑

Watched the latest homeowners qa and they mentioned some easy to balance lock shield valves. It’s something I need to look at in the winter as not had the HP that long. Or if they are not an option is there a reasonably accurate, or one I can calibrate, temp meter I can use to balance them.

If you don't need your trvs (and you shouldnt)  you can repurpose them as lsvs by removing the heads and replacing with  decorators caps.  Trvs generally have better 'valve authority' than old lsvs, ie the response to turning them occurs over a wider range of positions.  Old lsvs (and many new ones) are basically shut off valves so difficult to set precisely.  There is a heat geek video on valve authority. 

This doesn't have the easy set, calibrated, advantage of the frvs but may be easier than using your lsvs and avoids replumbing.

In addition its worth noting that some trv bodies have an adjustable flow rate restriction built in, eg Drayton ones, which you need a tool to set.  Again thus doesn't have the calibrated self maintaining functionality of the frvs, but may be useful in some cases.

That said I managed to balance my rads on the lsvs even though the adjustment on some of them was only in the last half turn.

 

This post was modified 3 weeks ago 3 times by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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Toodles
 Toodles
(@toodles)
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01/08/2025 10:27 am  

@jamespa I found the same about the last half turn being the only effective part of the mechanism. Some chap called Toodles wrote an article for RHH and he found the same too!😉 Regards, Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 2 years ago
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01/08/2025 10:31 am  

Posted by: @toodles
↑

Some chap called Toodles wrote an article for RHH and he found the same too!

I know.

 

Sadly many dont read articles, I keep referring people to the ABC guide that cathoderay wrote!  I must add yours to my list of referrals.

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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 Grantmethestrength
(@grantmethestrength)
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Joined: 7 months ago
Posts: 90
01/08/2025 10:35 am  

Posted by: @toodles
↑

@jamespa I found the same about the last half turn being the only effective part of the mechanism. Some chap called Toodles wrote an article for RHH and he found the same too!😉 Regards, Toodles.

It is deffo a me thing as it was your guide I was trying to follow lol! 2/10 go see the headmaster and try harder!!!!

 

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w + 13x 480w Solar Panels
Sigenergy 10kW Inverter
16kW Sigenstor battery


   
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Toodles
 Toodles
(@toodles)
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01/08/2025 10:36 am  

@jamespa Thank you!😊 Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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Toodles
 Toodles
(@toodles)
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Joined: 3 years ago
Posts: 2050
01/08/2025 10:38 am  

@grantmethestrength Sorry! I must try harder then! Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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 Grantmethestrength
(@grantmethestrength)
Estimable Member Member
Joined: 7 months ago
Posts: 90
01/08/2025 2:05 pm  

Posted by: @toodles
↑

@grantmethestrength Sorry! I must try harder then! Toodles.

I think it is very much me that is sitting outside the headmasters office for being unable to follow instructions lol!

 

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w + 13x 480w Solar Panels
Sigenergy 10kW Inverter
16kW Sigenstor battery


   
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