HVAC duct penetrations through fire/smoke rated assemblies require listed dampers and control/sensing to limit spread of flame and smoke.
Fire dampers (D) close on heat to maintain the fire-resistance rating of penetrated assemblies.
Smoke dampers (A) limit smoke migration in smoke partitions/barriers and in smoke control systems.
Air-handler shut-down sensors (F) (e.g., duct smoke detectors interfaced with the FA system) stop fans to prevent smoke distribution.
Not required: Balancing dampers (B) (for airflow only); Smoke barrier (C) (a wall/assembly requirement, not a duct device); Variable-volume smoke controls (E) (project-specific engineering, not a base requirement).
PDD refs: IBC Ch. 7 & 9; IMC §§607 (dampers) & 606 (smoke detection in ducts); ARE 5.0 PDD-MEP/fire protection integration.