Can California Projects utilize LI #10480 for LEED V4.1?

v4.1 references 90.1-2016 so this interpretation clearly does not apply. I have not seen one yet but assume there will be an updated interpolation at least comparing 90.1-2016 to Title 24 2016. I would guess that they would likely be deemed equivalent so that would not require an interpolation table.

The CEC did not create as detailed a study for the T24-2019 cycle to compare it to 90.1-2016 per the Energy Policy Act 1992's state code certification. As such USGBC doesn't believe an equivalency table is possible without someone doing more of a PNNL-type comparison which was in the prior T24-2016 report to the DOE.

The T24-2019 filing with the DOE is here: https://www.energycodes.gov/sites/default/files/2020-06/California_Certification_of_Com_Codes_Standard90.1-2016.pdf

It largely states: our 2019 is 10.7% better than our 2016 code and 90.1-2016 is only 7.9% better than 90.1-2013; therefore, we still comply with EPAct-1992. Good day sir.

v4 projects under T24-2019 can continue using ID 10480, but are stuck with the lower equivalency values from the prior code equivalency. v4.1 won't have anything but with the whole BPF change in v4.1, I am unsure if PNNL or anyone has done a study comparing new Appendix G methodology to another state code.