What does Thermal Protective Performance for Structural PPE measure?

Thermal Protective Performance (TPP) for Structural Personal Protective Equipment (PPE) specifically measures the amount of heat transfer that occurs within the layers of the garment when exposed to thermal conditions. This measurement is crucial for ensuring that firefighters are protected from excessive heat during firefighting operations. A higher TPP rating indicates that the garment provides better insulation against heat, helping to prevent heat stress and thermal injury for the wearer.

Understanding how heat transfer works within the layers of PPE is essential for making informed choices about gear that can maintain a firefighter's safety and operational effectiveness under extreme conditions. The effective management of thermal energy can enhance the survivability and performance of firefighters when battling fires.