LEED v5 BD+C Rating System_November 2025_clean - Page 157

Extracted Content

Indoor Environmental Quality Prerequisite

FUNDAMENTAL AIR QUALITY

EQp2

REQUIRED

New Construction

INTENT

To design for above-average indoor air quality to support occupant health and well-being.

REQUIREMENTS

Achievement Pathways	Points
New Construction and Core and Shell	N/A
Investigate Regional and Local Air Quality
AND	AND
Ventilation and Filtration Design	Ventilation and Filtration Design
AND	AND
Entryway System Design	Entryway System Design

Investigate Regional and Local Air Quality

Investigate outdoor air quality in accordance with ASHRAE Standard 62.1-2022, Sections 4.1– 4.3.

AND

Ventilation and Filtration Design

Meet the requirements of ASHRAE Standard 62.1-2022, Sections 5 and 6. Use the ventilation rate procedure, the IAQ procedure, the natural ventilation procedure, or a combination thereof. Where the ventilation rate procedure or IAQ procedure are used, comply with the following additional provisions:

• Filtration: Each central HVAC system that supplies outdoor air and/or recirculated air to regularly occupied spaces must meet one of the following:

  • Minimum efficiency reporting value (MERV) of 13, in accordance with ASHRAE Standard 52.2–2017 ; OR

  • Equivalent filtration media class of ePM1 50%, as defined by ISO 16890-2016, Particulate Air Filters for General Ventilation — Determination of the Filtration Performance ; OR

  • In-room air-cleaning systems;

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, November 2025 Edition 150