855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 125
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district energy sources serving the project, derive these purchased energy rates and/or conversion factors as follows:
o Purchased chilled water (CHW) . Multiply the utility rate or source energy
conversion factor for electricity by a factor of 0.325 to estimate the CHW utility rate or source energy conversion factor.
o Purchased heat from district hot water (HHW) . Multiply the utility rate or
source energy conversion factor by a factor of 1.5 for the predominant fossil fuel source used to generate the district hot water or natural gas if unknown.
o Purchased heat from district steam . Multiply the utility rate or source energy
conversion factor by a factor of 1.7 for the predominant fossil fuel source used to generate the district hot water or natural gas if unknown.
Summary of EA credit linkages to EAp2: Minimum Energy Efficiency
| Col1 | Option 1 ASHRAE 90.1-2019 | Option 2. ASHRAE 90.1-2022 |
|---|---|---|
| Applicability | Limited to projects registered prior to January 1, 2028. | Available to all projects. Required for projects registered on or after January 1, 2028. |
| Linked Credits: | ||
EAc2: Enhanced Energy Efficiency | EAc2: Enhanced Energy Efficiency | EAc2: Enhanced Energy Efficiency |
Prescriptive Method (Option 1, Paths 1 and 2 of the credit) | Required as precondition to document points for additional efficiency. (See Path 2, Case 1) | 3 points automatically awarded for prerequisite compliance using Prescriptive Method. (Path 1) Further points for additional efficiency using either Case 1. Systems Optimization or Case 2. Additional efficiency requirements beyond_ASHRAE_ 90.1-2022. |
| Appendix G PRM (Option 2 of the credit) NOTE**:** Treatment of on-site renewable energy varies from prerequisite. | Incremental performance improvement documented using the future source energy metric earns points. | Points awarded for improvement beyond a 90.1-2019 equivalent-baseline using the future source energy metric. Performance target for prerequisite and credit determined separately using simple calculation adjusting referenced BPF. |
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 114