SOG 17-02 Positive Pressure Ventilation

Question 1

SOG 17-02 Positive Pressure Ventilation

9 steps of PPV

Answer 1

1. Determining Ventilation profile
2. ensure the fire is under control
3. fan operations should be coordinated
4. fan placement should allow for complete airflow coverage of inlet
5. Exhausted shall be created as necessary to ensure controlled smoke removal
6. air flow from PPV must be controlled
7. a systemic approach focusing on the positive pressure created by the fan shall be used by personnel when clearing rooms/areas of smoke
8. An ongoing hazard risk assessment shall be conducted
9. consider discontinuing the use of the fan when checking for extension

Question 2

SOG 17-02 Positive Pressure Ventilation

Consider when exhaust locations shall be created

Answer 2

• as one area is cleared of smoke, it may need to be sealed off and another exit created in another area of structure to direct air flow into the next area to clear

Question 3

SOG 17-02 Positive Pressure Ventilation

Air flow from PPV must to be controlled throughout the operation. numerous openings or exit points reduce the effectiveness of PPV.

Answer 3

In some cases, windows and doors that are already open may, need to be closed to direct the air flow into fire area, or the most densely affected smoke area