855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 122

Extracted Content

• Site energy or source energy metric . (prerequisite only). Apply ASHRAE 90.1-2022, Informative Appendix I. For the source energy metric, use the 90.1-2022 Appendix I5. Methodology for BPF Adjustment to Account for Localized Conversion Factors if the project source energy conversions do not match those listed in Addendum Table I4-1.

  • Appendix G PRM, treatment of on-site renewable energy . Per ASHRAE 90.1, the renewable energy contribution toward meeting PRM requirements is limited to 5% of baseline building performance (BBP).

This varies from EAc2: Enhanced Energy Efficiency, Option 2, which either includes or excludes the entire renewable contribution from determination of credit compliance.

Appendix G PRM, exceptions to mandatory measures For mandatory measures where the savings associated with the measure can be documented in the energy simulation, the modeler may account for the absence of the mandatory measure in the energy simulation in lieu of compliance with the mandatory provisions. Model the BBP per Appendix G requirements and the proposed building performance (PBP) as designed for measures that are not required to be included in the BBP, such as daylighting controls. For measures where Appendix G requires the PBP to match the BBP, model the measure as present in the baseline BBP and absent in the proposed PBP.

Appendix G PRM, modeling shared HVAC and SWH systems For projects with shared base building HVAC or service water heating (SWH) systems, teams may model only the project space instead of following Appendix G PRM, Table G3.2, Additions and Alterations requirements to model the full area served by the shared HVAC systems.

If modeling only the project space, either treat shared CHW and shared hot water as District Energy Systems (DES) or allocate the base building HVAC and SWH to the project space.

Baseline design for projects with shared systems The Baseline HVAC system type must be determined based on the base building parameters unless Section G3.1.1 or additional or adjusted baseline HVAC system types applies to the interiors project space.

Base building parameters include building type, number of floors, conditioned floor area, and building peak cooling load.

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 111