Hi all, I have been told by bg that I need a power flush on my central heating system which is a combi system approx 8 years old. I accept that there is some dirt in the system and a clean can't be a bad thing but am wondering if a power flush is necessary. The water in the system is pretty clean and I have no problems with cold rads, air ingress etc. I am about to add two new rads to the system and a fernox tf1 filter so thought I might as well do the lot in one fell swoop. I am deliberating between a power flush and a normal chemical clean, adding cleaner and letting it circulate for the required time and then draining and filling the system until clean before adding inhibitor. My question is, will the additional time and expense involved with a power flush show a marked difference in the results I can expect? Thanks for reading, I would appreciate some impartial advice.