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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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EBOM-2009 IEQp1:Minimum IAQ Performance

Zone population

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Billy Nguyen
Facilities Engineer
LEEDuser Basic Member
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Hi all, I was doing the calculation for my office, and this confused me about the zone population because my office has 2 zones, office zone and conference rooms. Both are served by separate AHUs with separate OA supply. What should i put in the zone population? Because people cannot occupy the office & conference room at the same time, so is there any ratio i can apply on the total design population? Thank you, Billy

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Billy Nguyen
Facilities Engineer
LEEDuser Basic Member
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Tue, 06/05/2012 - 02:52

Maybe my question is not clear enough... Let's say i have 10 meeting rooms with capacity of 10 seats/room, so maximum number of occupants is 200. Should i put this number as the design population? Because i believe you will never see the rooms being occupied 100%.
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Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
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Tue, 06/05/2012 - 19:48

Billy, In your case (2 zones, 2 separate systems) both zones need to separately account for the design maximum occupancy. You need to create calculations for each ventilation system separately. If the same system was serving both the offices and the conference room you could take into account some design population diversity based on your judgement or the FTE.
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Billy Nguyen
Facilities Engineer
LEEDuser Basic Member
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Tue, 06/19/2012 - 15:18

Thank you, Dylan... Hope i can get enough for the IEQp1 requirements.

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