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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

Mechanically conditioned space

If you have a MECHANICALLY conditioned space, does it compel you to have MECHANICAL ventilation (not NATURAL)? GH

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Julia Weatherby
President
Weatherby Design & Co. Engineers
LEEDuser Basic Member
67 thumbs up

Mon, 07/29/2013 - 22:12

No, you are definitely not compelled to have mechanical ventilation just because you have mechanical conditioning. An example is a house with an air conditioner that has operable windows for natural ventilation but no outdoor air intake for mechanical ventilation. I have had a project such as this successfully certified.
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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
19 thumbs up

Mon, 07/29/2013 - 22:24

For version 2009 there is no requirement to mechanically ventilate when there is mechanical conditioning. ASHRAE 62.1-2010 however, does not allow for this configuration. I guess they caught on that it didnt really make sense for large office spaces. The next version of LEED therefore, will have to mechanically ventilate.

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