Which considerations guide the placement of a containment cabinet inside a room to minimize cross-contamination and ensure proper airflow?

• A. Place cabinets in areas with clean air supply first, maintain sufficient clearance to walls, avoid turbulence-inducing obstacles, ensure cabinet exhaust is properly vented and not recirculated, and maintain proper airflow directions.
• B. Place cabinets in areas near doors and vents to maximize access.
• C. Stack cabinets on top of each other to save space.
• D. Place cabinets directly against walls with no clearance.

Answer: (A)

The key idea is controlling how air moves through and around the containment cabinet so contaminants don’t spread and the cabinet’s ventilation works as intended. Placing the cabinet where the room’s clean air supply is available helps ensure the intake isn’t pulling in contaminated air. Keeping sufficient clearance to walls and other objects prevents flow disturbances and dead zones, allowing the cabinet’s intake, work zone, and exhaust to function with a smooth, predictable air pattern. Avoiding turbulence-inducing obstacles like traffic, equipment, or close proximity to doors preserves laminar-like flow and reduces the chance of contaminants being drawn into the work area. The exhaust must be properly vented or filtered and not recirculated back into the room, so contaminants are not released. Finally, the room’s airflow should be directed so clean air moves toward the cabinet intake and away from the user and surrounding surfaces, maintaining a protective barrier around the work area. Near doors or vents creates drafts, stacking cabinets compromises airflow, and placing a cabinet directly against a wall with no clearance can block intake/exhaust and promote recirculation, all of which undermine containment.