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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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General: Duct Insulation

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  1.  
    • CommentAuthorPaul_B
    • CommentTimeNov 12th 2007
     
    Afternoon,

    I need to replace the current fan in my ensuite urgently as it is broken and the level of condensation is causing mould. I want to use the existing wall grille and fit a fan to remove this moist air. Currently the ducting is thin flexible plastic (like tumble dryer hose) and passes into the loft which causes lots of condensation.

    Whilst I am fitting the new fan I am thinking of replacing the flexible duct with rigid duct. Therefore, should I use plastic duct, metal duct, pre-insulated duct or insulated sleeving from the likes of Kingspan or Knauf?

    Paul
    • CommentAuthortony
    • CommentTimeNov 12th 2007
     
    There is not much wrong with flexible duct though it can be obtained per insulated but with hardly any thickness used.

    You would be better wrapping it in quilt.

    I have given you the easiest solutions to the problem so far.

    I you want rigid fine again wrapping it in quilt is easiest making a box round it with insulation sheets seems like too much hassel. Also vert difficult to do well.

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