A couple of years ago I had a new central heating system installed as part of a full modernisation. Unfortunately I’ve been having problems with other aspects of the renovation so for a while I’ve been running it without a control system or TRV’s (I have a Honeywell EvoHome set ready to go but didn’t want these damaged by other work going on). Another reason is that I don’t have downstairs doors fitted yet so wouldn’t get the benefit of that extra control..
Now that I’m nearing completion, I would just like a bit of a sanity check on the plumber’s workmanship before I start fitting the control system and carpets etc.. I’m a bit concerned that some radiators feel cold lower down, I’m more accustomed to them being cold at the top if they need bled. Here are the specs;
- BAXI 28kW Combi boiler feeding 7 radiators in 3 bed terrace house with 2 receptions.
- Boiler located in kitchen.
- 10mm O/D speedfit pipes to all radiators
- I believe these all branch off 12 or 15mm speedfit pipe from the boiler (would need to lift boards to check).
Basically, I’m a bit concerned that the 10mm O/D pipe is too small and causing the cold spots lower down the radiators? Although this seems to be more of a problem downstairs than up? And could it be that they just need to be balanced properly and all will be well once TRV’s fitted?
Appreciate input from any experienced plumbers/heating engineers out there, also are there any relevant British Standards for selection of pipe sizing for heating systems you could point me to?
Thanks
Steve
