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855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 183

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INCREMENTAL ENERGY CREDITS Projects must achieve incremental energy credits above the minimum required for prescriptive method compliance. These incremental energy credits must be from the list of eligible HVAC, lighting, SWH, or building mass/night flush measures rather than the full list of measures from ASHRAE 90.1-2022, Section 11.5.2. To assess achievement of incremental energy credits (ECinc):

o Identify the minimum energy credits required by ASHRAE 90.1-2022, Section 11

(ECreq).

  • Determine the total combined energy credits achieved using ASHRAE 90.1- 2022, Section 11 from eligible measures and from noneligible measures (ECtotal).

o Determine the total combined energy credits achieved from the list of eligible

measures. (ECeligible).

o The quantity of incremental energy credits achieved is equal to the lesser of the

energy credits from eligible measures, or the total combined energy credits minus the energy credits required by ASHRAE 90.1-2022, Section 11.

inc eligible total req EC = Minimum (EC, EC - EC ) Example 1: Substantial alteration retail project in climate zone 4A All energy credits from eligible measures.

ASHRAE 90.1-2022, Section 11 requires 25 energy credits, determined by multiplying the 50% factor for substantial alterations referenced in ASHRAE 90.1, Section 11.5.1(c) by the 50 energy credits required for retail in climate zone 4A from ASHRAE 90.1-2022, Table 11.5.3-6 (ECreq = 25).

The project documents achievement of 52 total energy credits per ASHRAE 90.1-2022, Section 11, all of which are from measures eligible for LEED points.

  • H02: HVAC Heating Performance Improvement. 20% or greater weighted average improvement in ASHRAE 90.1-2022 heating efficiency achieves 28 energy credits.

  • L04: Increased Daylighting Control Area. 65% of total daylighting area with continuous daylight dimming achieves 4 energy credits.

  • L06: Reduce Interior Lighting Power. 10% or greater improvement in ASHRAE 90.1- 2022 regulated lighting power achieves 20 energy credits.

ECtotal = ECeligible = EC_H02 + EC_L04 + EC_L06

ECtotal = ECeligible = 28 + 4 + 20 = 52

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 172

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