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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

Testing Exhaust Fans

Does anyone have advice for a building where we are unable to find the drawings which specify the Design CFM for some of the exhaust fans? We have exhausted the search and can not find the drawings.

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Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Wed, 10/02/2013 - 16:36

If you are planning to reuse the existing system it would be beneficial to know how much air flow is being provided to each space and it is critical to know the amount of outside air provided by the AHUs. I'd recommend hiring a testing and balancing contractor.

Wed, 10/02/2013 - 19:45

Thank you. We have done air testing but dont we need to show that we are within 10% of the design CFM for the exhaust fans to show that they are performing as designed.
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Julia Weatherby
President
Weatherby Design & Co. Engineers
LEEDuser Basic Member
67 thumbs up

Tue, 10/15/2013 - 19:02

I think you could estimate the appropriate air flow for the exhaust fans. If you do not have someone on your project team already who is comfortable with this, try contacting an HVAC engineer.

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