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FAQs about IEQp1 :

What if after our Preliminary Review we have to re-work the ventilation rate procedure calculations and find that we need to make corrections to the system in order to meet the prerequisite? Can we redo the outside air testing after making corrections? Wo

What if our systems do not meet the required outside air when systems are tested at worst-case conditions?

Our building has a single fan that supplies outside air to multiple AHU’s. Do we need to perform outside air testing at the supply fan or at all AHUs?

We have a VAV system where single AHUs serve multiple zones. Do we need to take outside air measurements at each VAV box?

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EBOM-2009 IEQp1:Minimum IAQ Performance

Ez for projects unable to meet ASHARE 62.1-2007?

Hello. Is it necessary to consider the zone air distribution effectiveness (Ez) for projects unable to meet ASHARE 62.1-2007 when calculating 10cfm/person minimum ventilation? Thanks in advance,

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

Fri, 03/21/2014 - 16:16

No, you do not need to consider Ez for air handling units unable to meet ASHRAE 62.1-2007. The 10 cfm/person is as measured at the AHU outdoor intake. However, you do need to evaluate each AHU separately to determine whether it can meet ASHRAE 62.1-2007, prior to using the 10 cfm/person alternative. You may need to submit some AHU's through the ASHRAE 62.1-2007 path while others in the same building use the 10 cfm/person route.

Mon, 03/24/2014 - 01:21

Thank you very much, Julia!

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