855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 487

Extracted Content

Indoor Environmental Quality Credit

ENHANCED AIR QUALITY

EQc1 New Construction (1 point)

INTENT

Impact Area Alignment

• Decarbonization

Quality of Life

Ecological Conservation

and Restoration

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

REQUIREMENTS

Achievement pathways	Points
New Construction and Core and Shell	1
Option 1. Increased Ventilation	1
OR
Option 2. Enhanced Indoor Air Quality Design	1

Design the building 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 IAQ procedure, use Option 2.

Option 1. Increased Ventilation (1 point)

Increase breathing zone outdoor air ventilation rates by at least 15% above the minimum rates (for 1 point, or 30% for exemplary performance) 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 indoor air quality 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 Building Design and Construction, April 2025 Launch Edition 477