855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 127
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numerically identified in ASHRAE 90.1 [59] from Zone 0 (extremely hot) to Zone 8 (subarctic). Moisture zones are designated with letters: A (humid), B (dry), or (C) marine.
Projects with vacancy For the following building types, ESPM requires minimum occupancy averaged across the annual reporting period to be eligible for an ENERGY STAR® score:
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Office/Bank/Courthouse/Financial Office . At least 55% occupied, with no more than 45% of gross floor area vacant
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Hotel . Annual average totaling at least 60% of hotel rooms occupied daily
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Multifamily . At least 80% of residential units leased or sold
District energy for ENERGY STAR® scored buildings ENERGY STAR® Portfolio Manager (ESPM) includes guidance on inputting meters from purchased district chilled water, hot water, or steam plants. [60] Using ESPM, teams must identify the energy associated with the source on their own meter.
For projects in a campus environment, where the building owner also owns the district energy system, instead of entering district energy meters, projects may prorate the fuel and electricity used to generate thermal energy in the campus plant to the project based on the proportion of district energy consumed by the project. These should be reported as separate electric and fuel meters from the building meters.
Option 2. Energy Use Intensity Targets
Option 2 requires projects to achieve an energy use intensity (EUI) less than EUI targets for the project’s building activity and climate. The ASHRAE 100-2024, Appendix B EUI targets are similar to an ENERGY STAR® score of 60, requiring lower energy use than 60% of similar buildings. [61] The ASHRAE 100 EUI targets referenced in Option 2 address many more property types (or building activities) than the ENERGY STAR® score referenced in Option 1. However, ASHRAE 100 only normalizes for large variations in operating shift hours and does not adjust for other property details like ESPM.
At least 75% of the GFA must be associated with building activities referenced by ASHRAE 100-2024 to be eligible to apply Option 2.
59 ASHRAE, “ASHRAE Standards Addenda, ERRata, and Interpretations,” n.d., https://www.ashrae.org/technicalresources/standards-and-guidelines/read-only-versions-of-ashrae-standards. 60 ENERGY STAR Portfolio Manager (ESPM), “How do I enter energy district steam, district hot water, and/or district chilled water?”, April 12, 2023, energystar.my.site.com/PortfolioManager/s/article/How-do-I-enter-district-steam-district-hot-water-and-or- district-chilled-water-1600088551444. 61 ASHRAE, “ANSI/ASHRAE/IES Standard 100,” n.d., https://www.ashrae.org/technical-resources/bookstore/standard-100.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 117