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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

Operable windows & mechanically ventilated space

For a mechanically ventilated building for which the project team has attempted compliance with IEQc6.2 with operable windows the reviewer has commented at IEQp1 that the project may demonstrate compliance with this prerequisite using a combination of mechanical and natural ventilation. From our past projects experience we have never been asked to prove such a condition in a mechanically ventilated space when operable windows are used not for natural ventilation but simply for thermal comfort control. Has anyone ever had a similar experience? Thanks.

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Tue, 06/28/2016 - 18:51

I have never received this comment. However, I have been denied the ASHRAE 55 credit because I used operable windows for controllability and the reviewer said that since we cannot control the weather, we do not comply with ASHRAE 55.

Wed, 07/13/2016 - 15:44

Thanks Andrew, I guess that submitting a table with all openable windows confirming they exceed 4% of the net occupiable corresponding space would provided the requested clarification. As far as the ASHRAE 55 credit is concerned we have got a very weird comment indicating that operable windows have to be individually operable to count as a means of thermal comfort control. We have discussed this issue under IEQc6.2.

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