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EBOM-v4 EQp1: Minimum indoor air quality performance

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Simplified VRP Calculations

Project location: United States

April 5, 2021

Natalia Alvarez

Project Engineer
Pepper Construction

LEEDuser Basic Member

Project location: United States

April 5, 2021

We are working on a building built in the 50's, and the project team has elected to follow LEED Interpretation 10472 - Simplified VRP Calculations. Has anyone submitted a project using this method before? Does this require creating own calculator instead of using the Minimum Indoor Air Quality calculator provided by USGBC?

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Catarina Costa Goncalves

LEEDuser Basic Member

2 thumbs up

July 3, 2024 - 11:20 am

Natalia, did you had to provide evidence to demonstrate ventilation to all occupiable spaces?

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FAQs about EQp1:

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?

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

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?

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?

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?

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

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 AHUs. 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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