Pressure relief dampers are crucial components in HVAC systems, designed to automatically release excess pressure to maintain a balanced and safe environment. These dampers are typically installed in ductwork or ventilation systems to prevent over-pressurization, which can cause damage to the infrastructure and pose safety risks. By opening and closing based on pressure changes, pressure relief dampers help in regulating airflow, ensuring that the system operates efficiently and effectively. They are essential in both commercial and industrial settings, where maintaining optimal pressure levels is critical for the safety and performance of the HVAC system.