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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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    • CommentAuthordelprado
    • CommentTimeJun 30th 2017
    Has anyone considered this? I suspect on average ventilations are suboptimal (in the same way they are with windows in the house, when not assisted by wind buoyancy), so why not create a vacuum without a couple of extractors?
    • CommentAuthorgyrogear
    • CommentTimeJun 30th 2017
    Posted By: delpradoso why not create a vacuum without a couple of extractors?


    • CommentAuthortony
    • CommentTimeJun 30th 2017
    Because in so doing you would increase heat losses from your home.
    • CommentAuthordelprado
    • CommentTimeJul 1st 2017
    Tony - I am planning to have the under floor area completely sealed by membranes from the rooms
    • CommentAuthortony
    • CommentTimeJul 1st 2017 edited
    Still if you make it colder under there the heat loss will increase
    • CommentAuthorCWatters
    • CommentTimeJul 1st 2017
    Delprado - Can you explain more about the proposal.

    I see no reason why you couldn't put an MHRV unit under the floor instead of in the loft if that's what you mean.

    Normally you only extract from "wet" rooms (kitchen, bathroom, WC, Utility room) and feed fresh air into the "dry" rooms (living rooms, bedrooms etc). Extracting from the whole ground floor might not make sense.
    • CommentAuthorCWatters
    • CommentTimeJul 1st 2017
    I think some houses in radon risk areas have fans that extract air from under the house.
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