central heating problem

[sumodog]

My parents recently had 2 extra radiators added to their central heating system.

These new radiators don't seem to reach temperature.

They were added as 'spurs' to the existing two raidators at the end of the heating 'circuit' (hope this makes sense). The fella that fitted them used microbore pipe whereas the rest of the 'circuit' is traditional 1/2" (ish) pipe.

My question is whether the use of this microbore pipe would restrict the temperature these new radiators reach or is it that the whole system can't cope with the extra rads?

 

[Agile]

If you use cheap installers who dont understand pipe sizing and balancing then what do you expect?

Without full details of your system we cannot advise but it sounds unlikely to be properly designed. 10 mm pipe is not too bad but 8 mm is never likely to work.

Call him back and ask him to balance the system properly and insist that he gets all the rads to give the correct flow temperature.

Tony