What is the purpose of a pressure relief device in HVAC systems?

The primary purpose of a pressure relief device in HVAC systems is to relieve excessive pressure. These devices are critical safety components designed to prevent potential damage to equipment and reduce the risk of hazardous situations. When the internal pressure of the system exceeds safe operating limits—due to factors like thermal expansion, blockages, or system malfunctions—the pressure relief valve opens and allows excess pressure to escape. This function helps maintain safe operating conditions and prevents failures like ruptures or leaks that could lead to property damage or personal injury.

While monitoring temperature, controlling airflow, and enhancing energy efficiency are important aspects of HVAC operation, they do not directly relate to the specific function of pressure relief devices. Instead, they are managed by other components and systems within the HVAC framework.