Greenstar 25si - TRVs

[Mike999]

Hi, I have a Worcester Bosch greenstar 25si boiler and wonder if I need to have at least one radiator always on?
I read somewhere that I can have TRVs on all the radiators if the boiler has a “flowmeter”. In my case the always on radiator is in the bathroom. Can I have TRVs on all the radiators in a house with this boiler? Thanks!

 

[ShaunCorbs]

Yes need to have one always open

 

[Mike999]

thanks - how can I check which boilers I do not need to have one always open with?

 

[ShaunCorbs]

They all do as they need a heat leak / sink

 

[Mike999]

So this is not correct?
If your boiler is fitted with a flow meter – that detects when all of your radiator valves are closed, you can install a TRV on every radiator if you want to.

 

[Mike999]

It’s from a TRV article on best heating . com (can’t post a link for some reason)

 

[ShaunCorbs]

Yes that’s incorrect the internal bypass is just for the boiler not for the external system as it doesn’t have the flow rate capacity

Think there getting confused