My central heating system is approximately 12 years old. When would you expect that the radiators should be changed. Does their efficiency reduce with time?
I know that there can be a build up of sludge. If this is flushed out will they be as good as new?
Cheers
I know that there can be a build up of sludge. If this is flushed out will they be as good as new?
Cheers