Hi guys i'm in Scotland so not a hugely hard water area but think i may have sludge in the downstairs radiators, they only get really warm from half way up to the top, no air in system as i tried bleeding them.
With energy bills being so high looking to be as efficient as possible, what have you guys done in the past. Pay for a flush, get new radiators or both.
Boiler is getting close to 10 years old but radiators are closer to 20years.
any help or advise is appreciated