Interactive Tool
Visualize how Supply vs. Exhaust airflow relationships create directional pressure gradients. Use the slider to shift between AIIR (Negative) and Protective (Positive) environments.
Slide between negative and positive pressure to see how air moves through the doorway and hallway.
Slide left to simulate an AIIR (negative pressure).
Slide right to simulate a Protective Environment (positive).
Airflow is balanced. No strong directional movement between room and corridor.
This is a conceptual tool – not a CFD model. It’s designed to help explain pressure relationships to clinicians, IPAC teams, and facility staff.
Air is drawn from the hallway into the room, then exhausted. This helps contain infectious aerosols. You should see air “pulling in” at the door in the simulator when you move the slider left.
Clean, filtered air is supplied to the room and pushed out through the door gap. This helps protect immunocompromised patients by keeping corridor air out.
In the field, an isolation room is not just “negative” or “positive” – it is a set of measurable relationships between supply, exhaust and leakage paths. TAB technicians verify that those relationships hold under realistic operating conditions, not just at design.
In those cases, TAB work typically includes a combination of direct airflow measurement, pressure mapping, door testing, and coordination with controls/BAS to develop practical corrections.