Both metrics are climate-dependent, with allowable thresholds varying across the 19 ASHRAE climate zones to account for geographic differences in cooling demands. Relation to Standard 90.1
You can find the ASHRAE 90.4 standard in PDF format through various sources: ashrae 90.4 pdf
The International Code Council (ICC) sometimes offers standards like ASHRAE 90.4 for free online viewing (non-downloadable) as part of their "Get Free Access" initiative. You cannot save the PDF, but you can search and read it. Both metrics are climate-dependent
"Plotting a cycle on a T-s diagram and forgot how to read entropy?" Thorne grumbled. ashrae 90.4 pdf