Fitting TRV's on microbore system

Hi
I am looking to fit TRV's on our microbore system, but only want to fit them on about 70% of the radiators (the other rooms we dont use that often so can live with them being on or off). Is this OK to do, or do we need to fit the TRV's on all the rads to keep the system balanced (? - not sure if that is right !?)

Also, on a previous post I did, slugbabydotcom recommended the Europa TRV's for a microbore system (thanks for that!) - anyone else with a microbore system using TRV's and got any recommendations of what to get and where to buy from ?

thanks.....

I have a microbore system and have trv on all rads apart from one,I have been told you have to have one free flowing incase all other rads shut off ie if they are all trv and they all shut off boiler trips out due to no flow and over heat,thats why the need for one to be free flowing.

I was told this so its not gospel,but im sure someone here will def enlighten us

pincher said:

I have a microbore system and have trv on all rads apart from one,I have been told you have to have one free flowing incase all other rads shut off ie if they are all trv and they all shut off boiler trips out due to no flow and over heat,thats why the need for one to be free flowing.

I was told this so its not gospel,but im sure someone here will def enlighten us

Click to expand...

Thanks for that - I thought that was the case but wasnt sure.
BTW, what make TRV's have you got ? Are they any good/reliable ?