855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 227

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Additional considerations

For projects with multiple building types, the minimum required credits and credits achieved are weighted by the gross floor area of each building type.

Minimum required Energy Credits are adjusted lower than the default thresholds in Table 11.5.1.1-1 for certain project applications:

Core and Shell projects with central HVAC or service water heating must achieve 50% of the credits from Table 11.5.1.1-1. Other Core and Shell projects must achieve 33% of these credits.

Major renovations, referred to as substantial alterations in ASHRAE 90.1, must achieve 50% of the credits referenced in Table 11.5.1.1-1.

Projects without roof availability for PV or meeting Section 10.5.1 exceptions may use the referenced equation to adjust required credits below the default threshold per Section 11.5.1(e).

Unconditioned spaces, semi-heated spaces, and parking garages must achieve 50% of the credits referenced for other building types in Table 11.5.1.1-1.

ASHRAE 90.1 4.2.1 COMPLIANCE PATH: ENERGY COST BUDGET (ECB) METHOD

This approach compares the annual energy cost of the proposed design to that of a budget building. The budget building is essentially a clone of the proposed design but adjusted to meet the prescriptive requirements. The proposed design achieves ASHRAE 90.1-2019 compliance if the energy cost doesn’t exceed the budget. For ASHRAE 90.1-2022, on-site renewable must be included in the budget building model when prescriptively required and meet an additional improvement below the energy cost budget based on an adjustment referencing the prescriptively required energy credits from Section 11. Refer to the Building Envelope Backstop section referenced below for further guidance addressing limitations on envelope trade-offs when applying the ECB Method.

Avoid using the ECB Method to demonstrate improved regulated energy savings for EAc3: Enhanced Energy Efficiency.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 217