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Boiler flow temperature set at 67 C. Return 55 C. I think I will have a go at balancing the system via the TRVs (Drayton TRV4s) using the Drayton balancing key. I have ordered some clip on thermostats to check across each rad as well.

I am wondering if radiant heat from the rads is causing the TRVs to react early ?. The issues are more where the TRVs are controlling vertical column steel radiators. The system has been bled several times and the pump is quiet. No F & E tank as the system is sealed / pressurised. Could it be a...

Hi, I have recently had my central heating system replaced. The issue I have is with TRVs (Drayton TRV4s) noise and control. From what I have read it looks like water velocity ?. The TRVs / rads seem to be receiving very hot water very quickly. Consequently the TRVs make a hissing noise then...

I must admit that is an option to consider. I would still need to open up the flat roofs from above to get the insulation in between the joists and leave the air gap for cross ventilation. Thanks for the thought.

Hi, help and advice needed. Recently moved into a 1960 as built dormer roof / pitched roof house. Bloody freezing !. Found only 25mm insulation under the boarding in the pitched roof loft and only 25mm in the dormer flat roofs. Both open to each other via the 200mm roof / ceiling joists. No...