855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 339

Extracted Content

CORE AND SHELL Case 1. ASHRAE 90.1-2019 : If the prerequisite was documented using ASHRAE 90.1- 2019 Appendix G PRM, use Building Performance Factors from Core and Shell Table 4. 90.1-2019, Equivalent Building Performance Factors for a Future Source Energy Metric.

Case 2. ASHRAE 90.1-2022 : If the prerequisite was documented using ASHRAE 90.1- 2022 Appendix G PRM, use Core and Shell Table 5. 90.1-2022, Equivalent Building Performance Factors for a Future Source Energy Metric. Future source energy less than or equal to the Performance Index Target automatically achieves three points without crediting on-site renewable energy (Path 1), or two points when counting on-site renewable energy (Path 2).

Treatment of on-site renewable energy The Performance Index Target ( PIt) for EAc3: Enhanced Energy Efficiency omits the ASHRAE 90.1-2022 4.2.1.1 PRE adjustment for prescriptively required on-site renewable energy, matching the ASHRAE 90.1-2019 equation for PIt:

PIt = [BBUE + (BPF x BBRE)] / BBP

To determine the Performance Index (PI), either fully exclude the renewable contribution for Path 1, or fully include the renewable contribution for Path 2.

PATH 1. PERCENTAGE REDUCTION EXCLUDING ON-SITE RENEWABLE CONTRIBUTION

Path 1, the default energy simulation path, focuses solely on energy efficiency, requiring energy savings at or near achievable technical potential for maximum achievement of points.

This path does not recognize any on-site renewable contribution for the project (striking out ASHRAE 90.1 G2.4 on-site renewable energy guidance). Calculate the proposed building performance with total proposed design energy for all electricity, fuel, and district energy use, regardless of whether this energy is purchased or generated from on-site renewable systems.

PATH 2 PERCENTAGE REDUCTION INCLUDING ON-SITE RENEWABLE CONTRIBUTION

Path 2 applies primarily to project types that have limited opportunities for incremental energy savings beyond the referenced standard, such as unconditioned warehouses; and to projects that generate a large proportion of total building energy from on-site renewables.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 329