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Is outdoor air quality testing required in a space using natural ventilation?

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NC-2009 IEQp1:Minimum IAQ Performance

Engineered Natural Ventilation with Ceiling Fan

Hi, I have a lobby which has one side is open to outside. But the length of lobby is almost 40ft instead of 25ft. And their are 8 ceiling fans evenly. Could be this the case for engineered natural ventilation in IEQp1?

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Tue, 02/16/2016 - 19:21

If you can document that the air circulation induces OA all the way to the back, then you can submit it. Otherwise, install a small inline fan in the ceiling to meet the requirements of the remaining 15 feet and submit under mixed mode ventilation.
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Harry Flamm
Senior Sustainability Consultant
Stantec Architecture
LEEDuser Premium Member
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Fri, 04/15/2016 - 14:53

Andrew, Regarding your point about installing an "inline fan" to mitigate the 25' distance requirement, is this technique something that LEED has previously accepted? I have an occupied space that is 28' away and see this as a simple solution -- both for my current project, and for future designs.

Fri, 04/15/2016 - 20:25

I have not done this exactly, but I have used mixed mode ventilation successfully.

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