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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?

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

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NC-2009 IEQp1:Minimum IAQ Performance

Natural Ventilation Compliance - ASHRAE 62.1 2007 for LEED

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Marina Andrade
Sustainability Consultancy Services
Cushman & Wakefield
LEEDuser Basic Member
11 thumbs up

Hi! the only method to check compliance is this? - Based on Space Floor Area – Both Interior and Perimeter Spaces - Limitation on Distance of Interior Spaces from Perimeter Openings And...when i have a industrial building (hangar), I must analyze only the openings area? It's impossible to compliance the distance of openings in a environment like this. Thank you very much!

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Wed, 08/07/2013 - 16:20

Pablo, take a look at table 6-4. I believe you could group a hangar in there with a parking garage (especially since they typically do not fire the engines inside the hangar). This would make a hangar an exhaust only space. Note C would allow you to delete the exhaust requirement if you have two sides that are at least 50% open.
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Marina Andrade
Sustainability Consultancy Services
Cushman & Wakefield
LEEDuser Basic Member
11 thumbs up

Wed, 08/07/2013 - 16:39

Sorry, the hangar that've mentioned is like a storage, and not a garage. But, my question is....if i need to compliance the percentage of openings (4% of area), how can i use the table 6-4 to calculate these openings? thanks!

Wed, 08/07/2013 - 16:41

You are confusing the natural ventilation requirement with an exhaust requirement. If the area needs to be exhausted then that is your method of ventilation. If it is a storage space and is not an occupiable space then neither exhaust nor natural ventilation are necessary.
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Marina Andrade
Sustainability Consultancy Services
Cushman & Wakefield
LEEDuser Basic Member
11 thumbs up

Wed, 08/07/2013 - 16:49

Andrew, thanks again!
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Marina Andrade
Sustainability Consultancy Services
Cushman & Wakefield
LEEDuser Basic Member
11 thumbs up

Wed, 08/07/2013 - 17:03

Andrew, i'm confused about one thing. If my storage is an occupiable area i need exhaust or natural ventilation. To exhaust i'll use the rate of table 6-4. If i consider natural ventilation and not mechanical exhaust, i need to use just the percentage of total openings area?

Wed, 08/07/2013 - 17:10

Pablo, if you are storing hazardous material then you need to exhaust it. If it is just dry storage then you can use natural ventilation. In that case I would only apply the requirement to the area that is being occupied. For instance, if you have a desk type work area with a huge storage area behind it then apply the calculation to the desk area.
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Marina Andrade
Sustainability Consultancy Services
Cushman & Wakefield
LEEDuser Basic Member
11 thumbs up

Wed, 08/07/2013 - 17:19

Now i know much better. tks!

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