855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 319

Extracted Content

Indoor Environmental Quality Credit

ENHANCED AIR QUALITY

EQc1

1–2 points

INTENT

To design for increased indoor air quality (IAQ) to better protect the health of building occupants.

REQUIREMENTS

Achievement pathways	Points
Commercial Interiors	1–2
Option 1. Increased Ventilation	2
OR
Option 2. Enhanced Indoor Air Quality Design	1
OR
Option 3. Verification of Ventilation and Filtration	1

Design the project to exceed the requirements of ASHRAE 62.1-2022, Section 6. If using the ventilation rate procedure to comply with EQp2: Fundamental Air Quality, use Option 1 or Option 2; if using the indoor air quality procedure (IAQP), use Option 2.

Option 1. Increased Ventilation (2 points)

Increase breathing zone outdoor air ventilation rates by at least 15% above the minimum rates (for 1 point, or 30% for 2 points) as determined in EQp2: Fundamental Air Quality .

Increased outdoor air rates should be provided to 95% of all regularly occupied spaces.

OR

Option 2. Enhanced Indoor Air Quality Design (1 point)

In addition to the design compounds and design limits outlined in ASHRAE 62.1-2022, Tables 65 and 6-6, design and verify enhanced IAQ using the lower design limits listed below in Table 1.

Table 1. Additional design limits for enhanced IA Q design

Design compound or PM2.5	Enhanced IAQP design limit*
PM2.5	10 ug/m3
Formaldehyde	20 µg/m³
Ozone	10 ppb

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 308