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855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 188

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Case 3 Plug and Process Load Exceptional Calculation

Case 3 primarily applies to project applications with unique plug and process loads largely unaddressed by Table 3 equipment categories (such as manufacturing or laboratory) or projects where the streamlined methodology from Case 1 and 2 insufficiently reveals magnitude of impact for plug and process efficiency measures implemented for the project. Case 3 cannot be combined with Case 1 or Case 2.

Project analysts must use the ASHRAE 90.1, Section G2.5 exceptional calculation method to demonstrate a minimum percentage improvement in total plug and process energy usage compared to a baseline representative of standard practice for a similar project. Perform a detailed assessment to determine the total estimated annual energy consumption from all new and existing plug and process equipment in the project space, even when regulated under ASHRAE 90.1 :

  • Receptacle equipment

  • Cooking equipment

  • Refrigeration equipment

  • Conveyance equipment including elevators, escalators, or moving walkways

  • Process heating or process cooling (e.g., for manufacturing processes)

  • Data center IT equipment and Electrical Loss Component

  • All other process energy used to support a manufacturing, industrial, or commercial activity other than conditioning spaces and maintaining comfort and amenities for the occupants of a building

For each process efficiency measure implemented in the project, document that the efficiency measure is not conventional practice. Examples include:

  • A recent study with researched tabulations or monitored data establishing standard practice for the given application in similar newly constructed facilities

  • A new-construction utility or government program that provides incentives for the measure

  • A document showing the systems used to perform an analogous function in similar facilities built or reconstructed within the past 10 years

  • Applicable prescriptive requirements from the version of ASHRAE 90.1 or equivalent standard used for EAp2: Minimum Energy Efficiency

Use the conventional practice references to define the baseline systems. Provide detailed calculations and supporting narrative justification for any variations in baseline and proposed energy use.

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 177

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