What is the primary purpose of a positive-pressure ventilation system?

The primary purpose of a positive-pressure ventilation system is to remove heat and smoke from a structure. This method aids in improving conditions for firefighters and victims by clearing hazardous smoke, which can be detrimental to visibility and breathing. By introducing a high-pressure airflow into the building, the system effectively pushes smoke and heat out through designated openings, enhancing the overall safety and effectiveness of firefighting operations.

While cooling down a fire, preventing the spread of fire, and creating inward airflow can be associated goals or benefits of ventilation techniques, they do not represent the main objective of positive-pressure ventilation. The focus is specifically on the removal of the contaminated air, thereby helping to control the environment within the structure and allow for safer operations. Ventilation must always ensure that toxic gases and excessive heat are being expelled to maintain an effective attack strategy on the fire.