Definition & Operational Usage
Positive Pressure Ventilation (PPV) employs mechanical fans or blowers to introduce high-velocity fresh air into a structure, thereby elevating the internal pressure and expelling smoke, heat, and toxic gases through strategically placed exhaust openings. This technique is particularly effective in improving visibility and conditions for both firefighters and occupants during active firefighting operations. Not to be confused with natural ventilation, which relies on ambient wind and thermal effects, PPV is a proactive approach that aligns with Incident Command System (ICS) protocols.
Category context: Core tactics, command, suppression, ventilation, search, and water supply terminology used on the fireground.
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