Question-and-Answer Resource for the Building Energy Modeling Community
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The AFN objects are wrapped in the OS SDK, but I can't recall of a measure that does it for you. So you're probably looking at creating your own measure for it (or use a scripting language to add it to your model).
There are a couple of examples of usage on the OpenStudio-resources repo, here are the link to the Ruby versions but you'll find a Python equivalent:
