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FAQs about IEQp1 :

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

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?

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Forum discussion

EBOM-2009 IEQp1:Minimum IAQ Performance

Option B Calculator

Haley Duncan

Project Manager

Silver Oak Cellars

LEEDuser Basic Member

7 thumbs up

September 16, 2015

Where can I find the Option B Calculator that is used to calculate compliance with 10 CFM per person for AHU's unable to meet ASHRAE 62.1-2007?

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Trista Brown

Project Director

WSP USA

LEEDuser Basic Member

381 thumbs up

Mon, 01/25/2016 - 22:59

Hi Haley, there's no official calculator for this option. You can create your own spreadsheet listing out the following for each AHU complying via Case 2: - the number of occupants (system level) - the required outside air per Case 2 (e.g. occupants x 10 cfm) - the measured outside airflow This will let GBCI easily compare the required OA per Case 2 against the measured OA.

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