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Just installed one of these with vrf 65 and I have to say that I am disappointed. Call me old f fashioned but one aspect I miss a lot is a 1,2 or 3 hour boost that old system & programmer gave us. Not sure it is relevant so excuse if not.

Hi guys Judging by the times of the postings some of you need to get a life.....joke. As an ordinary "punter" it's good to know that there are people out there that are willing to help. Just for my info so that when the Valliant man questions me as to why I want the co2 ratio reduced from what...

Cheers guys and thanks for the replies. I will pass on the suggestions when the valiant man turns up on Wednesday. I will follow up after visit. Thanks

Had a valiant group services engineer out yesterday looking at a contols issue and got him to check emissions and watched him adjust co2 mixture to 9%. Which I believe is within limits. The noise was, I am sure, some sort of resonance when boiler was at maximum output.any thoughts would be...

Hi daryll Very similar to yourself new boiler (418 Eco Plus) on an existing system(very well flushed) but got very load short term whistle this evening when heating fired up. Outside temp was at it's lowest since installation. Very interested to know if you have found a solution. Vailiant...