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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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Renewable Energy: Outstanding solar thermal collector performance too good to be true?

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    • CommentAuthorJeremy S
    • CommentTimeFeb 11th 2013
     
    in response to scepticism about Navitron performance, I've attached the EN12975 test report - see p7 for n0=0.561, a1=1.61, a2=0.004, for aperture area.
    • CommentAuthorEd Davies
    • CommentTimeFeb 11th 2013
     
    Indeed, that's the report for the Navitron panel I've used before. However, you are using the figures for aperture area which really aren't all that illuminating. No areas are interesting unless you're short of roof space in which case it's the gross area which matters.

    However, converting the Kingspan numbers to gross area from aperture makes the difference larger. I'm puzzled.
  3.  
    I have Wagner & Co Flat Plate Panels installed on my office - L20AR is the model and they give fantastic performance. No plastic, solid aluminium and glass (aparantley you can walk on them but not tried!) which for me is very important in terms of durability.

    Would highly recommend.
    •  
      CommentAuthorSteamyTea
    • CommentTimeFeb 12th 2013 edited
     
    Posted By: greenshootsWould highly recommend.
    I would not recommend walking on a FP, especially if it is raining, they get slippy :wink:
  5.  
    Only walk on them?

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