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FAQs about IEQc3.2 :

Is it possible for the flush-out start date to vary by ventilation zone?

Should a parking garage be included in a flush-out, if it is in a basement and not fully open to the outdoors?

Do the outdoor air minimum quantities have to be met for each individual space, or for the building square footage as a whole?

Do non-regularly occupied areas such as bathrooms and corridors have to be flushed-out?

For LEED NC addition projects, do existing non-renovated areas need to be flushed-out or tested?

For IAQ testing, how many sample points are necessary in non-mechanically ventilated spaces?

Can testing be done over various days?

I'm confused about the 11/1/2011 LEED addendum that removed the "1/25,000 SF or each contiguous area whichever is larger" language from the credit requirement. How do we determine the number of sampling locations for testing?

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CI-2009 IEQc3.2:Construction IAQ Management Plan—Before Occupancy

Option 1 - Path 2

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Nancy Henderson
Managing Member
ArchEcology, LLC
LEEDuser Basic Member
67 thumbs up

I just had a mechanical engineer point out that the partial flush-out option does not include the requirement to maintain 60 degree temperature and 60% humidity. It seems to me that this requirement would be the same for both flush-out paths, but it really does not say that. Does anyone know if the temp and humidity requirements should be included in this path?

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Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Sat, 07/28/2012 - 01:07

It does appear that your mechanical engineer has found a technicality. I would venture to guess that it is an oversight in the credit language and that the 60/60 rule was not specifically excluded in option 2. You'd likely be jeopardizing your chances of getting the credit if you don't make an effort to stay within the required ranges because the LEED review is likely to take the same stance. The ranges are there for a reason. Supplying low temperatures for a long period of time would be uncomfortable for people finishing up the construction (minor work usually continues after the construction and installation of all finishes is complete). Supplying air with high humidity could cause moisture build up and eventually mold - leading to poor IAQ.

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