Fred D

So you went branch not radial? I think that would help me by reducing the number of pipes in a very confined space including not needing a manifold.

Olf - many thanks for your thoughts. If i sort out the front door, once this work is complete the ground floor will be pretty airtight - we are on 3 floors but every window is a replacement double glazed unit. Biggest source of air leakage will be the loft spaces. One of the requirements for replacing trickle vents is 'always on' so that there is a background constant replacement of air - are there standard extractors that function this way? You mentioned single room MVHR for the kitchen, which was my original plan, but there is quite literally no external wall to accommodate a flue. I couldn't find a single room MVHR unit that can vent vertically through a flat roof - do they exist? Thanks again

Hi everyone We are remodelling our terraced house to create a larger kitchen space and to add a utility room. As part of the process we will be installing new sliding doors at the rear, and the type we have is frameless meaning that they do not have trickle vents. In addition, the utility room has no windows and therefore no ventilation. Lastly, we have a downstairs loo that was previously vented through the rear of the house - a route that is no longer available. My proposed solution is an MVHR system, with the caveats that this is only for a few rooms and that being a victorian house it's a bit leaky. My questions are: - is MVHR the best solution, or is there an alternative mechanical venting solution that is more fit for purpose? - if I go MVHR, am i better off using a branch solution given that i have incredibly limited access/space, and roof joists that pretty much all run in the least helpful direction - i need to extract from kitchen, utility and loo. If i have those 3 extraction points, can I then just supply into utility and kitchen, or even just one of the two? - Exhaust/Intake can't be through an outside wall as there isn't one accessible on the ground floor - any issues with exiting via a flat roof void and then vertical flue? Thanks in advance for any assistance you can all provide

Will start a thread in the main area

Hi everyone, Live in London, and I'm currently having our Terraced house remodelled (downstairs, anyway). I will post a project summary and some questions in the main forums. Thanks