Hi , I was about to buy a Mira Honesty shower system but noticed on the installation instructions that it says a flow restrictor MAY need to be fitted when flow is greater than 0.5 bar. We have an unvented system and based on a test I did yesterday , we get 1.7 bar on one outlet (kitchen tap, near where the new shower will be) and 1.2 bar when we have another shower on. I have also been looking at a Hansgrohe E 240 but there is different information on the internet and with Hansgrohe on this system. Minimum of 1.2 bar and 1.8 bar are mentioned in various places. Will I have any issues with the Mira? If so, can anyone recommend what would be a good similar system (exposed bar valve, 2 outlet shower) to suit our unvented system? Thanks in advance.