855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 180

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For initial buildouts and substantial alterations, any ASHRAE 90.1-2022, Section 11.5.2 efficiency measures may be used to achieve the minimum energy credits required by ASHRAE 90.1-2022, Section 11 for the project’s type and climate zone. However, per ASHRAE 90.1- 2022 11.5.2, the combined contribution of renewable and load management measures is limited to 60% of the total required energy credits.

PATH 2. REGULATED LOADS

For projects that comply with EAp2: Minimum Energy Efficiency using the prescriptive method, Path 2 rewards further energy efficiency for the lighting, HVAC, and SWH systems installed in the project scope of work.

Case 1. Additional Efficiency — System Optimization

APPLICABILITY Case 1 primarily applies to projects documenting prerequisite compliance using ASHRAE 90.1-2019, Section 5–10 and to limited scope alterations of existing buildings complying with Path 1 above using ASHRAE 90.1-2022 .

Case 1 has limited applicability to substantial alterations and interior buildouts required to achieve energy credits by ASHRAE 90.1-2022, Section 11, because only strategies incremental to those used to achieve minimum required energy credits in ASHRAE 90.1, Section 11 may be used to show compliance:

o The lighting strategy cannot be used when measure L06: Reduce Interior Lighting

Power contributes toward minimum required energy credits ( ASHRAE 90.1-2022 11.5.2.5.6 ).

o The cooling, heating, and SWH efficiency strategy cannot be used when ASHRAE

90.1-2022, Section 11 measures H01, H02, H03, or W03 addressing HVAC and SWH equipment efficiency contribute toward minimum required energy credits.

o The fan power strategy cannot be used when measure H06: Dedicated Outdoor Air

System contributes toward minimum required energy credits ( ASHRAE 90.1-2022 11.5.2.2.6).

SYSTEM OPTIMIZATION STRATEGIES For projects pursuing Path 1. ASHRAE 90.1-2022 above, refer to the prescriptive requirements of ASHRAE 90.1-2022 for each strategy.

For other projects registered prior to January 1, 2028, refer to the prescriptive requirements from ASHRAE 90.1-2019 for each strategy.

Projects can combine multiple strategies to earn up to four points for all implemented strategies.

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 169