LEED v5 O+M Rating System_February 2026 - Page 068

Extracted Content

INDOOR ENVIRONMENTAL QUALITY

Indoor Environmental Quality Prerequisite

VERIFICATION OF VENTILATION AND FILTRATION

EQp1

REQUIRED

INTENT

To understand the amount of outdoor air being delivered by ventilation, exhaust, and filtration systems in comparison with ventilation standards for IAQ.

REQUIREMENTS

Achievement Pathways	Points
Existing Buildings	N/A
Ventilation and Filtration Verification

Meet all of the following requirements to verify the operational quality of ventilation, exhaust, and filtration systems:

• Include information on ventilation system operation and preventative maintenance as outlined in ASHRAE 62.1-2022 (or later), Table 8-1, “Minimum Maintenance Activity and Frequency for Ventilation System Equipment and Associated Component,” in the current facilities requirements and operations and maintenance plan required for compliance with IPp4: Current Facilities Requirements and O+M Plan.

• Investigate local and regional outdoor air quality. Determine the regional air quality status and conduct an observational survey of the building site and its immediate surroundings to identify local contaminants from surrounding areas that will be of concern if able to enter the building.

Meet the following requirements for mechanically ventilated spaces (except for residential units. See Residential section below):

• Calculate the minimum amount of outdoor air required by ASHRAE 62.1-2022 or later. Use simplified calculations from the standard or the ventilation rate procedure.

• Measure the amount of outdoor air being delivered by each ventilation system serving the project. Measurements may be made directly or by installed flow measurement devices in the system that are calibrated per manufacturer recommendations.

U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, November 2025 Edition 62