Hi @randy.carter,
Hope you are well!
It should work in your project as soon as an Air Terminal or other Equipment for that matter has a flow associated to it which is 4x Digests or more. Below are quick samples of settings which you can check and test on your side.
Settings in the Air Terminal Tag (L/s Sample):

Setting in your Project: (Also, L/s Sample. CFM will work exactly the same way)

I hope this helps! 
Rudi Roux
MSc | Digital Engineering Manager
LinkedIn
Revit Mechanical & Electrical Systems 2018 Certified Professional | Revit MEP & Architecture 2015 Certified Professional
AutoCAD 2015 Certified Professional | Autodesk Building Performance Analysis (BPA) Certificate
If this post resolved your issue, kindly Accept as the Solution below. Kudos are always welcome ⇘