_positive-pressure-ventilation-ppv-deployment.jpg "Positive Pressure Ventilation (PPV) Deployment from wcd Video Screenshot Preview")
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⏲ Duration: 39 sec
✓ Published: 28-Mar-2013
✓ Published: 28-Mar-2013
Description:
The video above demonstrates the efficacy of this tactic in mitigating the wind-driven spread of heat and smoke. Without the use of PPV, you will observe that the smoke and heat enters into the stairwell. When a firefighter activates the PPV fan, the positive pressure created by the fan pushes the smoke back into the hallway of the fire floor, increasing visibility, and reduces the temperature inside the stairwell.
The video above demonstrates the efficacy of this tactic in mitigating the wind-driven spread of heat and smoke. Without the use of PPV, you will observe that the smoke and heat enters into the stairwell. When a firefighter activates the PPV fan, the positive pressure created by the fan pushes the smoke back into the hallway of the fire floor, increasing visibility, and reduces the temperature inside the stairwell.
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