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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.

Buy individually or both books together. Delivery is free!

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    • CommentAuthorborpin
    • CommentTimeSep 6th 2017
    A friend of mine is looking at MVHR for a new build and is looking for a supplier. As my supplier went bust and I would not recommend them anyway, are there any suppliers that are worthy of a recommendation?

    House will be in central belt of Scotland.
    • CommentAuthortony
    • CommentTimeSep 6th 2017
    I use Genvex or Boulder. Is this materials or supply and fix?
    I had a good experience with Green Building Store (Yorkshire based) in terms of system design - they also supply and produced an itemised schedule etc. for ordering.

    Install, commissioning etc. is a separate service so I can't comment on that as we are going for someone more local to us.
    • CommentAuthordelprado
    • CommentTimeSep 6th 2017
    Does anyone have any experience of Zehnder?
    • CommentAuthorgravelld
    • CommentTimeSep 6th 2017 edited
    BPC get lots of recommendations for design and supply (they aren't the manufacturer).
    • CommentAuthorsnyggapa
    • CommentTimeSep 6th 2017
    Used these about 6 years ago, very happy: http://www.thebuiltenvironment.co.uk/acatalog/index.html

    They used to offer various packages - for us they did design & supply, a half day training for our builder and then the commissioning after the builder installed it.

    I used ADM Systems about six or seven years ago and they were very helpful.
    • CommentAuthordelprado
    • CommentTimeSep 7th 2017
    What does everyone think of Ommi? They use Zehnder which I mentioned above
    • CommentAuthorconverse
    • CommentTimeSep 8th 2017
    I now go direct to the manufacturers and install/commission ourselves, mostly because it makes it easier to coordinate stuff on site like that, but also because I have very little confidence in the average installer's ability to follow drawings, building regs, and make airtight joints. Ventaxia and Silavent will both design a system for you - then take it to your favourite merchants and get them to quote against the design.
    • CommentAuthorborpin
    • CommentTimeSep 8th 2017
    Great thanks folks.
    • CommentAuthorsnyggapa
    • CommentTimeSep 22nd 2017
    Tony - I'd be interested on your opinions on Boulder stuff. This is for a retro fit of a 140m2 house, so looking at the DHV-20B or 25

    Any thoughts - they seem to be a sensible price point, but at the cost of poor documentation and accreditation from what I can see (no fan power SPF charts or exchanger efficiency charts)

    I am trying to put together a spreadsheet that equates fan power efficiency and heat recovery efficiency because I could spend 50% more on a silavent or over double on a vent axia.. I do care about efficiency but if it's not going to pay back I am better spending the money on other measures


    • CommentAuthorcjard
    • CommentTimeSep 23rd 2017
    BPC supplied my ventaxia, good guys to deal with

    It doesn't really "pay back" in the sense of "I installed an MVHR and halved my heating costs so it paid for itself in just 2 years" - it's more intangible than that. You pay some money for a house that feels fresh nearly all the time, and isn't stuffed full of insects; your wife is overjoyed that there are no more farty kids bedrooms or mouldy bathrooms. The cost of this joy is relatively cheap.. Look to ebay for second hand or similar units if you need to save a few shekels, of course never losing sight of the fact that it's a fan in a box. My kit was 2500 quid I think, and I regard it money well spent, if only for the fact that the bedroom supply bent is in the wardrobe and makes the clothes smell like the outside air all the time. This wife acceptance factor, coupled with not having to buy litres of Lenor, is approximately the same worth :)
    • CommentAuthorsnyggapa
    • CommentTimeSep 23rd 2017
    Thanks, yes. We installed a vent axia kinetic BH in our current house but that was a new build to all intents and purposes and I entirely agree with the intangibles you list - which is why were looking at retrofitting it into the new house we are renovating. The new place has terrible damp problems too so ventilation should in theory help whilst we work out what the real cause of the damp is (I suspect a combination of lifestyle, penetrating and unsuitable building materials for an old stone house. Someone from mike wye is coming round to take a look next week)

    The bit that sticks is "1800 quid for 2 fans in a box" - so the intended question is whether paying 700 quid for 2 fans in a box (boulder) is false economy over 1800 for 2 fans in a box :)
    Just going through a list of suppliers myself:

    Green Building store
    System Air (Now Domus ventilation?)
    Paul Heat Recovery
    *EcoFlow ventilation
    ADM systems
    *SolarCrest (they tend to sell you all their other services at the same time also)
    The built environment

    Most are ones people on here and on BH have used/recommended. Those with an asterix, I don't know much about.

    Then if you know what system you are after, there is always Fleabay.

    Just had one quote through for unit £1500 and then another £2700 on top for semi rigid ducting!! Not sure how inter-changeable ducting is across different units?
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