855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 223
Extracted Content
RESIDENTIAL PROJECTS OR PROJECTS WITH DWELLING UNITS
Projects with residential spaces are required to provide minimum ventilation in every dwelling unit. This is unique for residential spaces. Two pathways are available for flexibility in compliance. Projects are encouraged to go beyond the requirements of this prerequisite and to comply with ASHRAE 62.2-2022 [101] when possible.
OPERABLE WINDOWS
For this pathway, the project must demonstrate that at least one operable window is in each bedroom of the dwelling unit. Calculate the window openable area using the bedroom floor area to demonstrate that the minimum requirement is met. Additionally, confirm sufficient operation and cleanliness of the window(s). Follow the guidance of the Visual Opening Inspections section above.
MINIMUM OUTDOOR AIR RATES PER UNIT
For this pathway, the project must demonstrate that the dwelling unit’s ventilation meets or exceeds minimum rates.
Calculate the minimum required rate using the equation in the rating system and then measure outdoor airflow. Follow the guidance of Measured Outdoor Airflow section. The calculations come from ASHRAE 62.2-2022, Section 4.1. [102] Sampling procedures for the measurement are acceptable.
Bathroom Exhaust
Each full bathroom within the dwelling unit must exhaust to the exterior.
Carbon Monoxide Monitoring
A carbon monoxide (CO) monitor must be hard-wired on each floor of the dwelling unit and have battery backup. There are no exceptions to this requirement even when residential units may not have permanently installed CO-generating equipment. CO monitors are mandatory in all types of units as a basic life safety measure.
Common areas in residential projects or projects with dwelling units must meet the requirements for non-residential spaces.
101 ASHRAE, “The Standards for Ventilation and Indoor Air Quality,” n.d., https://www.ashrae.org/technical- resources/bookstore/standards-62-1-62-2. 102 ASHRAE, “The Standards for Ventilation and Indoor Air Quality,” n.d., https://www.ashrae.org/technical- resources/bookstore/standards-62-1-62-2.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 213