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Green Building Bible, Fourth Edition
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Energy Assessment: What is this fan used for?

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  1.  
    • CommentAuthortony
    • CommentTimeNov 11th 2008 edited
     
    What is this fan used for?
      forumfan.jpg
  2.  
    i cant quite see your visa card number - got a closer shot?
  3.  
    Testing the new McClaren?
    • CommentAuthorKevinBolan
    • CommentTimeNov 11th 2008
     
    It's a bog standard cased axial fan with what looks like a manual control on the top. Could be used for any one of a number of things.
    •  
      CommentAuthoragu
    • CommentTimeNov 11th 2008
     
    Making pop stars hair on top of the pops move, now up for sale due to the demise of the show?
  6.  
    Paper weight, blowing up ladies skirts...?

    J
    •  
      CommentAuthorfostertom
    • CommentTimeNov 11th 2008
     
    A big thank you to all my fans
    • CommentAuthortony
    • CommentTimeNov 11th 2008
     
    not even close yet! It has handles on it so it can be picked up and moved. Need more clues?
  9.  
    It looks a little bit like the sort of fan used in blower-door tests, minus the tent and the flow control rings - though I seem to recall the one used on our tests was larger than that.

    Am I close?

    Paul in Montreal.
    • CommentAuthortony
    • CommentTimeNov 11th 2008
     
    Perfect! -- It would never get the pressure up to anywhere useful in the UK but it is a German one easily capable of getting their houses to pluss or minus 70Pa.

    Has a computerised control panel built in too.
  11.  
    I suspect not many people in the UK have seen one of these in action. Over here, the fan is always used to depressurize since you can then go around with a smoke pencil and find the incoming air leakage paths - something that would be impossible if the house was pressurized. Depressurization (due to wind) is actually the main driving force for air to leak into a building anyway so the depressurization test is more realistic.

    Paul in Montreal

    p.s. on our first (pre-renovation) test there was the feeling of a hurricane as the fan ramped up to full speed!
    • CommentAuthorstephendv
    • CommentTimeNov 11th 2008
     
    Paul, I saw the smoke test done in a video (posted on this forum somewhere) in Switzerland I think, where they pressurized the house, then blew it full of smoke and stood outside to see where the smoke left the building.
  13.  
    ...so not for blowing skirts up then... :sad:

    J
    • CommentAuthorTerry
    • CommentTimeNov 11th 2008
     
    Have to agree Tony, the one I saw pictures of looked to be significantly bigger - going by the credit card held alongside(is it a credit card?)
    Will have some more concrete evidence in a couple of months when we get our place tested
  15.  
    Posted By: stephendvPaul, I saw the smoke test done in a video (posted on this forum somewhere) in Switzerland I think, where they pressurized the house, then blew it full of smoke and stood outside to see where the smoke left the building.


    Ouch, that sounds like it would use much more smoke than the depressurization method - let alone the difficulty in seeing smoke coming out from inaccessible places! Still, with a seive-like house it must be fairly dramatic!

    Paul in Montreal.
    • CommentAuthorTerry
    • CommentTimeNov 11th 2008
     
    dragons be here :bigsmile:
  17.  
    Posted By: stephendv: Paul, I saw the smoke test done in a video (posted on this forum somewhere) in Switzerland I think, where they pressurized the house, then blew it full of smoke and stood outside to see where the smoke left the building.

    That kind of smoke test I believe is often used in larger buildings i.e Industrial units. A smoke pencil in a larger building is pretty much useless.

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