New guidance has been issued for LEED v4 projects regulated by energy performance standards that are more stringent than the LEED v4 referenced standard, ASHRAE 90.1-2010.
This guidance allows projects regulated by these standards to easily demonstrate additional energy performance improvement under the LEED v4 Energy and Atmosphere (EA) credit Optimize Energy Performance.
- Title 24-2016—LEED Interpretation #10480 provides projects in California with a streamlined pathway for documenting additional energy performance improvement in LEED v4 using energy models developed for compliance with Title 24-2016.
- ASHRAE 90.1-2013 or IECC 2015—LEED Interpretation #10481 provides projects regulated by these standards a streamlined pathway for documenting additional energy performance improvement in LEED v4 using ASHRAE 90.1-2013 Appendix G.
What this means for project teams
These interpretations were created to significantly reduce effort and costs for teams by enabling them to use an energy model developed for local code compliance to document energy savings in LEED. Projects can now adapt the energy model developed for code compliance to document additional energy percentage savings over the LEED v4 referenced standard ASHRAE 90.1-2010 Appendix G, using the tables provided in the published LEED interpretations. See the Resource section of these LEED Interpretations for streamlined documentation associated with these compliance paths.
The pilot ACP Alternative Performance Rating Method allows projects to use the ASHRAE 90.1-2016 Performance Rating Method to document credit compliance. The Building Performance Factors (BPF) published for that path are aligned with ASHRAE 90.1-2010 performance, allowing significant additional credit for projects that comply with the more stringent 90.1-2016 BPF.
USGBC and the LEED Committees will continue evaluating additional energy performance standards as alternatives to ASHRAE 90.1-2010, to further streamline documentation requirements for projects.