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FAQs about IEQp1 :

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

For a space designed to be naturally ventilated, can operable windows or vents be used to satisfy the 62.1-2007 requirements?

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NC-2009 IEQp1:Minimum IAQ Performance

CFD based air changes vs mechanical exhaust.

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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
19 thumbs up

Hey andrew. Do you know how natural ventilation compares to mechanical flow rates? For example, if I had a bathroom with 100 cfm of required exhaust, does the 4% openings requirement match the ach equivalent to 100cfm?

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Tue, 02/17/2015 - 13:45

The 4% opening will not likely be equivalent to the required exhaust rate in most cases. It is possible if you leave the windows open and you are putting air into the room. That being said, the 4% does meet the 2007 requirements.

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