855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 331

Extracted Content

To be eligible to apply EAc3: Enhanced Energy Efficiency, Option 1, Prescriptive Path, Path 1. Regulated Loads, projects using an ASHRAE 90.1 -equivalent standard must use a prescriptive method from the equivalent standard: compliance must be demonstrated per category of building systems (building envelope, HVAC, lighting, service water heating, etc.), without tradeoffs between system categories.

For projects that use a standard other than ASHRAE 90.1 or International Energy Conservation Code (IECC) for prerequisite compliance, projects must apply the methodology in ASHRAE 90.1-2022, Section 11 to achieve points under Path 1:

• Case 1 . Prescriptive values from the ASHRAE 90.1-2019 -equivalent standard for efficiencies such as lighting power density allowance or equipment efficiency may replace ASHRAE 90.1-2022, Section 11 referenced values.

• Case 2 . Four New Construction points or two Core and Shell points are automatically rewarded for prescriptive compliance with an ASHRAE 90.1-2022 -equivalent standard. For additional points, projects must document achievement of ASHRAE 90.1-2022 Section 11 credits, including:

o The minimum required credits for the project type and climate zone AND

o Incremental credits above the minimum required from the list of eligible measures.

For projects that use the International Energy Conservation Code (IECC) prescriptive method for prerequisite compliance, energy credits from IECC-2024, Section C406 Additional Efficiency Renewable and Load Management Requirements may directly replace energy credits from ASHRAE 90.1-2022, Section 11 Additional Efficiency Requirements. Projects must exclusively use either ASHRAE 90.1-2022 or IECC-2024 to document achievement of energy credits. Eligible measures from IECC-2024 C406 are limited to HVAC (H01 to H05), Lighting (L01 to L06), and Service Water Heating (W01 to W10).

• Case 1 : Implement additional efficiency credits calculated per IECC-2024 C406 from the list of eligible measures. Prescriptive values from IECC-2021, Sections C402–C405 such as lighting power density allowance and equipment efficiency may replace IECC-2024, Section 11 referenced values.

• Case 2

o Four New Construction points or two Core and Shell points are automatically

rewarded for compliance with IECC-2024, Sections C402–C406 .

o Implement incremental C406 credits, above the minimum required from the list of

eligible measures.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 321