What is a type of fire door that automatically closes on its own?

A self-closing fire door is specifically designed to close automatically after being opened, either through the use of a spring mechanism or a hydraulic closer. This feature is crucial for maintaining compartmentalization during a fire, as it helps to limit the spread of smoke and flames, thereby enhancing the overall safety of the building. The self-closing mechanism ensures that the door returns to its closed position, creating a barrier that complies with fire safety regulations.

In contrast, sliding fire doors operate differently and may not automatically close without manual assistance or another system in place. Double action fire doors can swing in both directions but do not inherently possess the automatic closing feature unless specifically designed with that capability. Manual fire doors require human intervention to close, which would not fulfill the essential safety function of automatically sealing off areas from fire and smoke. Therefore, the self-closing mechanism makes this type of fire door vital for effective fire protection.