What term describes the stratification that occurs in a room based on temperature, gas density, and pressure?

The term that describes the stratification that occurs in a room based on temperature, gas density, and pressure is thermal layering. This phenomenon occurs during a fire event, where different layers of air and smoke form at varying heights in a room due to the differences in temperature and density. Warmer gases, which are less dense, rise to the ceiling, while cooler gases collect nearer to the ground. This stratification can significantly influence firefighting tactics and the behavior of fire, as firefighters need to be aware of these thermal layers to avoid dangerous conditions, such as flashover, and to effectively locate victims or the seat of the fire.

Thermal layering highlights the critical need for awareness of the environment during fire operations, as situational awareness can determine the success of rescue and firefighting efforts. Understanding this concept is essential for effective decision-making in emergency scenarios.