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FAQs about IEQc3.2 :

Should we install furniture and furnishings before IAQ testing or flushout?

The air temperature and/or relative humidity went out of the credit requirement specifications for a portion of the flush-out. What do we do? Can we extend the flush-out for the equivalent amount of time to make up for it?

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

What "floor area" to use

Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Since the credit template is not linked to the Gross Floor area in PIf2 (as it is in other relevant credits), does that mean the floor area in the flushout calcs should be net area, as it is done for IEQp1? It would make sense to only count the area inside the air barrier, but since IEQc4.x credits incorrectly refer to breathable space as "inside of the weather-proofing system", I'm not sure if the reviewer will have a similar view of what should be counted for flushout calcs. With about 2 feet separating the air barrier and "weather-proofing system" in some of our Alaskan walls, should I use gross floor area (which is akin to "inside of weather-proofing system") or should I use breathable space (inside air barrier, which is what is used for ASHRAE 62.1 calcs).

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Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Thu, 10/08/2015 - 20:17

Any input would be appreciated. Bueller?.... Bueller?
Profile picture for user dconnelly
Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Thu, 10/08/2015 - 20:34

I've always used gross. I've never been questioned on it. There isn't even much to fill out in the credit.
Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Thu, 10/08/2015 - 20:40

Thank you, Dylan. Given the thickness of our walls, and the difficulty of keeping the space above 60 degrees during a winter flushout, the ~30 million cf difference between gross and net area makes a difference.
Profile picture for user Dave.Hubka_2
Dave Hubka
Practice Leader - Sustainability
EUA
LEEDuser Expert
510 thumbs up

Thu, 10/08/2015 - 21:15

We also use gross and do not get questioned. A few years back we received the following review comment "please note that all spaces that are occupiable must be flushed out". So technically you could subtract the "non-occupiable" (walls, columns, mechanical shafts,etc.) floor area from the gross floor area and meet the intent of the credit. I'd recommend you clarify the area difference between GSF and area flushed out before submitting to GBCI for review.

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