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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

Requirement of Measurement for a new ventilation system

We are working on an existing factory project. It is mechnically ventilated in most spaces and those have been measured. However, the office spaces were conditioned through untiary ACs without fresh air. After the Level 2 Energy Audit, a desicion to replaced all the untiary ACs with VRFs and Fresh air systems was made to meet the LEED mandatory requirements. This was duly executed and commissioned.

For this credit, in the IAQ Calculator, we have used measured values for the Exhaust fans, but designed CFM values for the Newly installed fresh air systems. We have the design drawings and equipment specifications.

The Reviewer is asking for measured values for the new systems as well. Will not the Design values suffice? considering this is what we do in new building projects. 

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Dave Hubka
Practice Leader - Sustainability
EUA
LEEDuser Expert
510 thumbs up

Fri, 11/22/2024 - 11:57

"Measurements taken at the system level within five years of the end of the performance period" per the credit langauge. GBCI will enforce this for existing systems as well as newly installed systems.  Unfortunately they will not allow design values to be used as is typical in New Construction projects. 

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