Per CDC Guidelines and ASHRAE/FGI requirements adopted into NFPA 99, airborne infection isolation (AII) rooms must maintain negative pressure relative to adjacent areas and provide a visual pressure monitoring mechanism (e.g., manometer, electronic monitor).

A: HEPA/UV is supplemental, not a universal requirement.

B: Minimum is 12 air changes per hour, not 20.

C: Anterooms may be provided but are not universally required.