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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

Measured rates far exceeding ASHRAE requirements

Just compared the OA rates measured at each AHU by the TAB contractor with our ASHRAE calculations. For some of the AHU's the actual OA (as measured by the TAB guy) far exceeds the min OA required of the AHU per ASHRAE. Technically this credits requires that you have no less than the minimum, but has anyone had an issue with the reviewer complaining about over ventilation of the spaces?

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

Tue, 09/03/2013 - 21:29

Nena, No LEED issue with providing more than the minimum. However, there is an energy cost associated with providing more than the minimum amount of OA. Consider having the TAB contractor reduce the OA to the minimum if the amount is way too much.

Wed, 09/04/2013 - 16:04

Dylan, Thank you for the response! Yes, I agree makes no sense to over ventilate spaces so much - waste of energy and $.

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