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Hi all I recently had a new boiler fitted, to comply with the law I got a CORGI reg'd chap who specialised in heating. The boiler he put in was a Ravenheat condensing combi, CSI85 I think the model is, coupled to the existing 10mm microbore system with 9 radiators. My comments really...

My CH comprises a Glo-worm space saver 45-60 with a gravity fed primatic cylinder and 9 radiators. Over the last few years it has become increasingly noisy, to the point where the neighbours have actually commented on it. The noise occurs in both the pumped and gravity circuits, although the...