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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?

What options are available to projects outside the US to meet this prerequisite?

Can LEED 2009 projects elect to follow ASHRAE 62.1-2010 for this prerequisite?

Which units should be included in the calculations for this prerequisite?

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NC-2009 IEQp1:Minimum IAQ Performance

Natural Ventilation by Windows

Can an air conditioned space that has operable windows earn minimum IAQ performance prerequisite by demonstrating the compliance with natural ventilation requirements? Kindly advise.

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

Tue, 09/17/2013 - 13:00

Yes, for ASHRAE 62.1-2007, it is permissable. ASHRAE 62.1-2010 however, does not permit natural ventilation of a conditioned space.
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Julia Weatherby
President
Weatherby Design & Co. Engineers
LEEDuser Basic Member
67 thumbs up

Tue, 09/17/2013 - 13:04

Yes. I have taken this approach successfully with a group of LEED certified duplex dwelling units. The air conditioning unit provides heating and cooling. The windows provide the ventilation for LEED certification purposes. We also had continuous bathroom fan ventilation to meet Energy Star ventilation requirements, but the exhaust fan was not the method used to certify for LEED.

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