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Extractor fan back draught shutter - one flap or two?
Having felt a cold incoming draught from the bathroom extractor fan I'm
looking at adding a back draught shutter to the pipe run. As usual, nothing is easy. I can have one flap or two. Advantages of one over the other? Cheers Dave R -- AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
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