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We have a top floor flat in an old building consisting of 5 flats in total, situated on a hill. Currently, we have a 15mm copper pipe water supply leading up to our kitchen and I have measured 14l/min flow from the kitchen sink and ~3bar static pressure and ~2.5bar working pressure when opening...

Hi All, Does anybody have experience in installing boilers bought in Germany in UK? It seems that Viessmann UK market is lacking some models available in continental Europe. I am mainly interested in the Viessman 222-w or 300-w. Is there a lot of difference in piping, certification etc...