855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 358
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of operation and provide narrative confirmation justifying that ongoing achievement is anticipated at or above the specified level.
OR
EXCLUSION OF DES RENEWABLE ENERGY PROPORTION FROM ANNUAL SITE ENERGY DETERMINATION For each district energy source fueled by renewable energy, exclude this proportion of renewable energy from the annual site energy determination. To be eligible for exclusion, the renewable energy shall either be an Eligible Renewable Electricity Resource Type or an Eligible Tier 3 Renewable Fuel Resource Type per the descriptions above, or shall be classified as renewable energy by national, state, or local policy governing the project location.
For example, for a district heating system fueled by 70% biofuel classified as renewable in the project’s country, include only the 30% of project district heating associated with non-renewable fuel inputs in the annual site energy determination used for credit compliance.
Annual Site Energy Adjustments for District Energy Systems (optional)
For projects where the high efficiency associated with district chilled water generation artificially inflates total estimated site energy consumption, projects may optionally apply either the DES Multiplier or the Virtual DES Efficiency to all District Energy System (DES) sources serving the project:
DES Multiplier
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Multiply total reported site energy consumption for purchased chilled water by 0.325.
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Multiply total reported site energy consumption for purchased heat by 1.2.
Virtual DES efficiency in EAc3 Enhanced Energy Efficiency Projects crediting DES efficiency towards the project performance in EAc3: Enhanced Energy Efficiency by modeling the proposed district energy use as virtual on-site chilled-water and hotwater plants may optionally use the total modeled site energy consumption from this proposed rather than separating out the site energy consumption for purchased chilled water and purchased hot water.
In the energy simulation, use submetering to distinguish fuel used onsite from the modeled fuel use for the district hot water plant. Per the Renewable Attributes, Project Energy Source criteria, either renewable electricity generation or renewable fuel may be applied to the submetered fuel
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 348