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

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? Wou

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 to meet ASHRAE 62.1-2010 due to design limitations. How much outdoor air must we provide to meet Case 2 instead?

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?

What happened to the IEQ Space Matrix that was available to version 2009 projects? What should I reference to determine how spaces in my building should be categorized for this prerequisite?

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Forum discussion

EBOM-v4 EQp1:Minimum indoor air quality performance

Confirming that ventilation is provided to all spaces

Reference Guide states that the most important is to confirm that ventilation air is provided to all occupiable spaces in the building (especially such as circulation, back of house spaces, and active storage rooms). We have a 100% outdoor air system with single AHU supplying fresh air to multiple zones through diffusers. As we are taking OA flow measurements at the AHU only, how can we prove that ventilation air is provided to all spaces? Thanks!

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Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Fri, 09/01/2017 - 18:50

If you have mechanical plans for the building, the plans should show the distribution of ventilation air to occupiable spaces. But, that said, the reviewers are probably not going to look through all of the HVAC plans to double check every space. Nor are HVAC plans always available. Instead, they'll look to see that the total floor area addressed by the calculations is roughly the same (within 10%) as the gross floor area of the building. Also, they'll look to see that distinct space types such as fitness areas, cafeterias, conference rooms, and so on are addressed by the calculations as well.

Tue, 07/02/2024 - 09:35

 We are working in a similar project where OA flow rate measurements will be only avaiable at AHU. Can the IAQ be populated per total GFA or must be space by space (even if we dont have OA per space) ? We currently dont have ay any floor plans that confirms OA per occupiable space as well.. We only have per system/AHU and air distribution through 5 levels (per floor).   

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