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FAQs about EQp1 :

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

Our building has a single fan that supplies outside air to multiple AHUs. Do we need to perform outside air testing at the supply fan or at all AHUs?

What if after our Preliminary Review we have to revise 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?

My building has 80 AHUs providing ventilation to building spaces. Do I have to do the ventilation calculations and conduct outdoor air measurements for each one?

Our system cannot provide enough outdoor air due to design limitations. What should we do?

What if our systems do not meet the required outside air when systems are tested at worst-case conditions?

The outdoor air intake for our ventilation system is not accessible, and it’s not possible to measure the outdoor airflow directly. How can we determine the outdoor airflow for this system?

How do I find whether my project is located in a non-attainment area for particulate matter or exceeds the prerequisite ozone requirements?

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EBOM-v4.1 EQp1:Minimum Indoor Air Quality

Systems Unable to Meet Required Outdoor Airflow Rates

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Dang Thi
ESD Engineer
GreenViet Consultancy Company
LEEDuser Basic Member
3 thumbs up

I have a question,  compare to LEED v4 EBOM, in the new version 4.1, the case 2 of this credit is removed. That mean in this version 4.1, all occupiable room/space must be comply with ASHRAE 62.1-2016. Is it right?

Because, if it is right, our project must be add new ventilation equipment to comply Standard without reach to the minimum setpoint in case 1 and not less than 5l/s of outdoor air per person.

Otherwise, our project is a office building so this addtional is difficult for owner because of physical constraints of the existing ventilation system.

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Thu, 09/28/2023 - 14:51

Hi Dang, That's right, the total building area must equal the ventilated area shown in the calculator. The only exception is large spaces that are accessible only for equipment retreival suh as mechanical rooms or inactive storage. If your predominant building use is "office" you may use one single row in the "single zone system" tab, with Ez=1.

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