Didn't see an existing thread for this one, so I'll start one here. I am including this on a couple different projects and getting ready to submit one for review now. This has been a "not quite..." on some of my projects but an easy innovation point for others that were originally designed to ASHRAE 2016 and/or designed with infection control in mind. Nice to be rewarded for meeting a higher standard when the IEQ prereq is a few versions behind and doesn't address filtration. 

It seems that the documentation prepared for the IEQ prereq + Commissioning prereq/credit should be enough to show compliance here (unless you also need to do the 1C calculation) but I'll report back post-review if it's not.