Definition & Operational Usage
Positive Pressure Exhaust Ventilation (PPEV) is a tactical ventilation method that uses fans to create higher pressure inside a structure, forcing smoke and heat out through designated exhaust openings. This technique controls the flow path by pushing contaminants away from firefighters and occupants, improving visibility and reducing thermal hazards. Not to be confused with Positive Pressure Ventilation (PPV) which introduces air, PPEV specifically focuses on enhancing exhaust efficiency during fireground ventilation operations within the National Incident Management System (NIMS) guidelines.
Category context: Core tactics, command, suppression, ventilation, search, and water supply terminology used on the fireground.