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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

Trending Acceptable for Mins and Maxs?

Once the outside air has been read and the assumed potential critical zones have been identified, if a building owner/staff is unable to compile the mechancial as-builts in order to determine max (Vdzd) and min (used to determine Ds), is it acceptable to trend those spaces through the building DDC system for a certain period of time in order to determine those values? Any further advice? Thanks in advance.

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Profile picture for user dconnelly
Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Mon, 06/04/2012 - 17:55

Roger, Many times the Max and Min values for a terminal unit are listed as adjustable points in the DDC system. Check there first. Unfortunately, unless you are trending during peak indoor and outdoor conditions and you may not see your maximum flow at your critical zone during a short trending period. Minimums will probably occur more often and would be caught in a trending period of a day or so.

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