855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 312

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241-2023, Section 5.1 for compliance with the Resilient Spaces credit Option 2 — Management Mode for Respiratory Diseases treat infectious aerosols, use only systems that have a verified effectiveness according to ASHRAE Standard 241-2023, Section 7.

OUTDOOR AIR MEASUREMENT

With proper outdoor airflow monitoring, facility managers can identify ventilation issues and correct problems before they impact IAQ . This credit requires airflow monitoring for larger systems within the project scope of work (more than 1,000 cfm (472 L/s) of outside air). Airflow monitoring is encouraged for smaller systems but not required.

Specific alarm and system control capabilities are not addressed in this prerequisite and may be designed to suit the project’s specific needs.

Healthcare Projects and Spaces

• Healthcare projects must comply with ASHRAE Standard 170-2021 for ventilation design and filtration requirements. ASHRAE 170, Table 7-1 specifies the minimum outdoor air changes per hour (ACH) and minimum total ACH for each healthcare space type. Both requirements must be met. For space types not covered in Standard 170, use ASHRAE Standard 62.1-2022 .

Entryway Systems

Permanent entryway systems prevent dirt and particulates from entering the building. The entryway system requirement for this prerequisite is intentionally broad to accommodate more project situations and to ensure feasibility as a prerequisite requirement.

Acceptable entryway systems include permanently installed grates, grilles, slotted systems that allow for cleaning underneath, or rollout mats.

Entryway systems are required at all primary exterior entrances within the LEED project scope of work .

PRIMARY VS. NONPRIMARY ENTRANCES Primary exterior entrances are the main designated entry points to the building. These entrances typically have the most visibility and accessibility. Design elements, like canopies or biophilic elements, often attract entry.

Nonprimary entrances are less visible and often have limited access or are used less frequently. A nonprimary entrance includes service access points or lift lobbies, side or

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 301