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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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Products: Balanced single room heat recovery ventilation unit through roof or ridge tile?

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    • CommentAuthorShevek
    • CommentTimeJun 18th 2014 edited
     
    Does anyone know of a balanced single room heat recovery ventilation unit that can be ducted through a roof or ridge tile? And preferably with a summer time by-pass.

    The only ones I've found are through-wall.
    • CommentAuthorbarney
    • CommentTimeJun 18th 2014
     
    Do you have a void to fit the unit- ie flat bit of ceiling below the ridge ?

    The Ventaxia range (100R) for example can do about 18l/s and are fully spigoted for supply and extract sides.

    You can use connections to standard ridge vents

    Regards

    Barney
    • CommentAuthorShevek
    • CommentTimeJun 18th 2014 edited
     
    Ha, thanks Barney, I just got off the blower to someone from i-sells.co.uk recommending this unit. (Mind you a person I spoke to at Vent Axia never mentioned this product for whatever reason).
    http://www.vent-axia.com/product/hr100r.html

    Right within our price range too :smile:

    The guy at i-sells said it would probably be *just* enough to ventilate the square meterage we have (12 m2 bedroom + 2.5 m2 en suite, at 2.1 m high.)

    We do have enough space because we're double-framing for 270 mm roof insulation.

    He said it doesn't have a summer bypass but that if we really wanted to we could take the heat exchanger out over summer, although he reckoned it wouldn't be worth it.
    • CommentAuthorbarney
    • CommentTimeJun 18th 2014
     
    OK - it was a unit I came across that we considered for a few small "fishbowl" type managers offices in a large open plan floor plate solution.

    We just connected the supply and extract to the main ventilation via an "air gap" and let each room do it's own thing (there was an occupancy shut off involved so we didn't want anything more complex other than relatively stable fresh air that wasn't "too" cold

    I would have thought it would be OK based on actual volumes of "fresh" for the occupancy - even if it doesn't quite get to BR compliance based on area

    Regards

    Barney
    • CommentAuthorShevek
    • CommentTimeAug 14th 2014
     
    The overflow/condensation on this ventilation unit (and our boiler) is just a little bit bigger than 21.5 mm overflow/condensation pipes. So how are you meant to connect the two?

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