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I have typically taken the second approach, adjusting/reducing the height of all windows on all faces to get the model down to the 40% limit. We have an excel file that determines the reduction needed and calculates the new heights that can be pasted back into eQuest. [Also handy because it checks & adjusts for the requirement for a Chapter 11 model.] I am potentially missing something, but the first approach would require both creation of new windows and a decent number of calculations to determine the WWR by fa├žade; yes? Not a criticism, but a question since I typically am in eQuest and not OpenStudio [yet - diving in soon though!]. Thanks for any insight into this approach