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NC-2009 IEQc3.2:Construction IAQ Management Plan—Before Occupancy

Performing testing under Option 2 - number of samples

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Adriana Hansen
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CTE - Centro de Tecnologia de Edificações
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For performing testing under Option 2 (IAQ Testing), for a singular space above 25,000 sf served by several similar AHU systems, could it be acceptable using the “1/25,000 SF or each contiguous area whichever is larger" method to quantify number of samples? Or should we consider one sample for each AHU system? Thanks, Anderson

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Tom Nichols
LEED AP (O+M)
4 Elements Group
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Mon, 05/19/2014 - 23:17

Anderson, Our experience with Option 2, IAQ testing, is you must default to testing the total # of AHU zones, assuming they all provide supply air to separate zones. Otherwise you would have a hard time explaining how you tested all supply air zones byusing the 25,000 sf criteria.
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Adriana Hansen
Manager
CTE - Centro de Tecnologia de Edificações
LEEDuser Basic Member
80 thumbs up

Tue, 05/20/2014 - 12:54

Thank you very much for your fast response, Mr. Nichols. In my specific project, the area of ​​the space described above is around 82,000 sf (single zone without partition walls)being served for 20 AHU systems. Do you think I need to take 20 samples in this space? Thanks again
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Tom Nichols
LEED AP (O+M)
4 Elements Group
LEEDuser Basic Member
34 thumbs up

Tue, 05/20/2014 - 16:44

yes, It seems excessive to test 20 areas. Do each of the 20 AHU supply air to 20 individual zones? A CIR is always an option. I believe you will need to be able to make a case that you are testing the entire space using the default (contiguous floor, 25,000sf, individual supply air unit/zone) as your guide to determine the total # of areas. Sorry I can't be more helpful without knowing the specifics of your mechanical system.

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