HXHOPPERS CROSSINGTraining groundBRIGADE TRAINING
TRAINING GROUND / VENTILATION

PPV airflow labEXPERIMENTAL

Change the openings. Follow the flow. Discuss the difference.

Model & sources ↗
00:00
Drag the fan to reposition. Click a door to inspect it.1 grid square = 1 m
Fresh air / flowSmoke loadFire sourceTop-down, mixed-room model
MODELLED FAN INFLOW0.00 m³/s
OPEN EXTERIOR OPENINGS0
SMOKE LOAD0%
Position the fan at an open exterior door and provide an exhaust path.
TRAINING MODEL

Educational model, not a validated fire prediction. Room airflow and smoke movement are illustrative estimates. Active fire may grow when ventilation supplies oxygen. This model does not calculate tenability, flashover or safe entry. Read the assumptions and facilitator notes ↗

Build a ventilation exercise

  1. Start with the example or choose New plan. Upload a PNG, JPEG or WebP floor plan to use as a reference.
  2. Build rooms. Choose Room and drag a rectangle. Rooms snap to a 0.25 m grid. Adjoining rooms must share a wall without overlapping. An irregular room can be represented by separate rectangular compartments with wide openings.
  3. Add openings. Choose Door or Window and click a wall. Use the inspector to change its width, height or open percentage.
  4. Set the scenario. Use Smoke to fill a room or Fire to toggle an illustrative smoke source. Drag the fan outside the entrance and use Direction to aim it.
  5. Run and compare. Try closing the exhaust, reducing fan speed or opening another route. Select an opening and use its open slider while the simulation runs.
  6. Save the exercise. Save locally keeps one scenario in this browser. Export downloads a JSON file that can be shared and imported, including its reference image.

Fan speed scaling and pressure capability are declared modelling assumptions. The manufacturer reference values were measured in an AMCA test arrangement. This is a discussion tool for supervised training, not an incident planning tool.