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What is the source for the VAV fan power coefficients in the DOE Commercial Reference Buildings?

I know they're not Appendix G values, and I can't seem to find a mention of where they're sourced from. An internal NREL project?

Any help would be appreciated!

What is the source for the VAV fan power coefficients in the DOE Commercial Reference Buildings?

I know they're not Appendix G values, and I can't seem to find a mention of where they're sourced from. An internal NREL project?

Any help would be appreciated!

What is the source for the VAV fan power coefficients in the DOE Commercial Reference Buildings?

I know they're not Appendix G values, and I can't seem to find a mention of where they're sourced from. An internal NREL project?

Any help would be appreciated!

Edit: For reference, here is a Google Sheets plot of fraction of full load fan power versus fan part load ratio for 90.1-2004 Appendix G and the VAV fans in the Commercial Reference Building Large Office ("new", meeting 90.1-2004)