Three-floor casino HVAC system with dedicated air handling units (AHU-1, AHU-2, AHU-3) serving panoramic restaurant, main gaming floor, and underground security levels. Supply ducts distribute conditioned air through zone-specific diffusers while return and exhaust ducts remove stale air via vertical risers integrated into the elevator shaft. Kitchen and bar exhaust systems include dedicated hoods with sealed sewer vent connections and pressure relief ducts to maintain building pressurization. This architecture isolates critical security areas with independent air handling while maintaining comfort in public spaces and kitchen zones. Fork this diagram on Diagrams.so to customize duct sizing, add damper controls, or adapt for your facility's unique layout and occupancy requirements.