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How we do it here is we manipulate the window heights to adjust the WtWr.

We copy the window heights to an excel spreadsheet, determine a sizing factor based on how much more or less we want the windows to be, and then multiply the window heights by the sizing factor. Then we copy the new window heights back into eQuest.

This obviously has limits in that you can't increase the window height beyond the wall. We use this method mostly for reducing WtWr's for code compliance in a reference building.