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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorringi
    • CommentTimeFeb 10th 2017 edited
    Use a normal MVHR with ducts very likely with the new low resistance flexible ducts and a distribution box. Or redesign the layout..... (I expect a good layout for FreshR would also reduce pipe lengths etc as it helps if all the wet rooms are together.)
    • CommentAuthorcjard
    • CommentTimeFeb 11th 2017
    Though do bear in mind that even coagulating your wet rooms, you still need supply points that are far away; let's say you designed your house like a cartwheel which kitchen and bathroom central and stack atop each other, you'd still need long ducts along the spokes to the rim where the supply points are.. I.e. A certain extent of ducting you can't get away from.. Though if fresher principles are to be believed, maybe they're unnecessary.

    I have to say, gut feeling for me is to either back up VH's claims on freshR, or to say that traditional MVHR layout patterns aren't too important; the house I'm in now is fully ducted for MVHR but I haven't yet installed the roof vents so I don't have the mhr active. I'm not noticing any serious IAQ issues. Meticulously installed AT too, and there are very few draughts (though I haven't done a blower test yet, maybe there really is a gaping hole in the roof.. But then again the electricity bill is 20 quid a week in the current cold snap, and it's providing all energy to a house 5 times the size of the flat I formerly lived in, for half the price, so I probably got something right..). I'm still keen to install it, but I'm starting to think that FreshR's reliance on diffusion gradients would actually be very effective in the right house configuration
    • CommentAuthorgravelld
    • CommentTimeFeb 11th 2017 edited
    They specced five Fresh R units for my house! Not cheap but still a useful alternative to consider.

    I thought it would come down to biting the bullet on internal disruption in fitting MVHR.

    Sorry, taking this off topic into retrofit. As you were!
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