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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Ducting
I am looking to install an extractor fan in a newly created internal
kitchen. The problem I have is that the nearest point to which to extract (i.e. external wall) is some 4m away. I will be fitting a 6" extractor as per Building Control instructions. The ducting, together with the waste from the sink, will run behind a new partition wall in the adjacent room. I would like to keep this new wall as close as possible to the existing wall as the room is quite narrow already. I intend to use a standard wall mounted fan - something like this one: http://www.screwfix.com/app/sfd/cat/...23262&id=24840). My question is: will it be OK to run 4" ducting for it along the 4m span? Can I use something like this: http://www.screwfix.com/app/sfd/cat/...23473&id=14118 ? It would make my life much easier as I will only need two flat-to-round adaptors on either end, and I would lose less of the room. It seem much harder to find adaptors, etc for the 6" flat one ( http://www.screwfix.com/app/sfd/cat/...23473&id=59769). Considering that these fan are only designed to work to their full capacity with straight ducting of 2-3m according to the manufacturer (mine will be a pretty messy 4-5m), I just thought that I could get away with using smaller ducting. Is the only drawback the drop in performance, or is there anything else I need to consider? I should probably add that I am not too concerned with the performance of the fan, as it is only there to satisfy the BCO demands, and I will happily live without the fan altogether (personal choice, I know). Many thanks in advance for your thoughts. J. |
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