855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 129
Extracted Content
referenced dataset used to establish the EUI targets. The multiplier is greater than one for longer operating hours and less than one for shorter operating hours. For mixed-use buildings, the operating shift multiplier is determined separately for each building activity prior to calculating the weighted average EUI target.
Equation 2. Weighted average EUI target for mixed-use building
𝐸 𝐸𝐸_𝑇 𝑇 𝑇 =
𝑇 𝑇 𝑇 ∑�𝐺 𝐺 × 𝐸 𝐼 × 𝑆 �𝑓 𝑓 𝑎 𝑎 𝑏 𝑏 𝑏 𝑏 𝑎 𝑎 𝑎 𝑎 𝑎
𝑇 𝑇 𝑇
∑(𝐺 𝐺 ) 𝑓 𝑓 𝑎 𝑎 𝑏 𝑏 𝑏 𝑏 𝑎 𝑎 𝑎 𝑎 𝑎
Projects with vacancy At least 70% of the project must be occupied to pursue Option 2. For projects with partial vacancy, refer to ASHRAE 100-2024, Section 7.2.4 Energy Use Intensity Targets for Vacant and Partially Vacant Buildings [65] for further guidance.
Option 3. Performance Relative to Historical Baseline
For property types ineligible for an ENERGY STAR® score, teams can prove compliance by comparing the current reporting period to a historical baseline.
HISTORICAL BASELINE
The historical baseline represents a consecutive 12-month period occurring no more than eight years before the end of the current reporting period. At least an 8% reduction, in either site energy use or source energy use, must be demonstrated for compliance with the prerequisite unless the project is a high process load building.
The historical baseline must have similar operational attributes, like quantity of occupants, schedule of operations, and percentage of vacant space. If these are more than 10% higher in the historical reporting period than the current reporting period, teams must select a new historical reporting period that aligns more closely with the current reporting period operations, or provide further justification to support that the differences would not significantly affect project energy use.
Normalization Teams may opt to normalize historical data against the reporting period for operational variables that affect energy consumption such as weather, production throughput, quantity of major events for an event venue, or addition of new functionality. Justification must be provided for each variable that is normalized. The following resources provide guidance on normalization:
65 ASHRAE, “ASHRAE Standards Addenda, Errata, and Interpretations,” n.d., https://www.ashrae.org/technical- resources/standards-and-guidelines/read-only-versions-of-ashrae-standards.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 119