I asked the same question to my advisor and no one had a answer, more importantly how does one turn it on or off?
Mick - click on the a/c custom button, and the hepa control is the last on as shown in this picture:
Got it Thanks Frank
Two filters involved with the system.
I'd think that the HEPA filter is always used for filtering, the bioweapon mode just closes the cabin and maximizes the airflow to clean the air inside. No?