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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 compliance

Hi, We´re working on a project that is pursuing IEQ P1 via natural ventilation. The 4% of ventilation surface required could be achieved using operable windows? Or it is mandatory the use of permanent vents? Thanks for the answer Guillermo

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Mon, 01/23/2012 - 18:08

Hi Guillermo: ASHRAE 62.1 clearly states: "Naturally ventilated spaces shall be permanently open to and within 8 m (25 ft) of operable wall or roof openings to the outdoors, the openable area of which is a minimum of 4% of the net occupiable floor area." So the answer to your question would be: yes, operable windows can be used. Hope it helps.

Tue, 01/24/2012 - 01:34

Hi Luis Thanks for the reply. The confusion came up with the term "permanently" i thought that only vents were allowed to satisfy the credit since operable windows could be closed by employees. Thanks again

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