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855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 324

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For less complex buildings, the prescriptive path offers a streamlined approach to achieving energy efficiency without requiring complex energy modeling by implementing predefined efficiency measures. It is particularly beneficial for projects with limited resources or those that do not require the flexibility of the energy simulation path.

PATH 1. REGULATED LOADS

Path 1 is available to projects that comply with EAp2: Minimum Energy Efficiency using the prescriptive method.

  • Case 1 applies to projects complying with Prerequisite Option 1 using ASHRAE 90.1- 2019, Sections 5–10.

  • Case 2 applies to projects complying with Prerequisite Option 2 using ASHRAE 90.1- 2022, Sections 5–11.

Projects registered beginning January 1, 2028 must use ASHRAE 90.1-2022, and earlier registered projects may use either ASHRAE 90.1-2019 or ASHRAE 90.1-2022 .

For both Case 1 and Case 2, projects must use the protocol in ASHRAE 90.1-2022, Section 11. Additional Efficiency Requirements to achieve energy credits. See guidance from EAp2: Minimum Energy Efficiency and ASHRAE 90.1-2022, Section 11. Additional Efficiency Requirements.

Case 1. ASHRAE 90.1-2019

ASHRAE 90.1-2022, Section 11 energy credits must be achieved from the list of eligible HVAC, lighting, service water heating, or building mass/night flush measures rather than the full list of measures from ASHRAE 90.1-2022, Section 11.5.2.

Use the less stringent ASHRAE 90.1-2019 prescriptive references in lieu of ASHRAE 90.1-2022 prescriptive references for the following measures:

  • H02: HVAC Heating Performance Improvement ( ASHRAE 90.1-2019 11.5.2.2.2 ).

o Refer to the heating equipment efficiencies in ASHRAE 90.1-2019, Section 6.8.1

tables.

  • H03: HVAC Cooling Performance Improvement ( ASHRAE 90.1-2019 11.5.2.2.3 ).

o Refer to the cooling equipment efficiencies in ASHRAE 90.1-2019, Section 6.8.1

tables.

  • L06: Reduce Interior Lighting Power ( ASHRAE 90.1-2019 11.5.2.5.6 ).

o Determine the interior lighting power allowance using the ASHRAE 90.1-2019,

Section 9.6 Alternative Compliance Path: Space-by-Space Method .

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 314

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