Fire dampers must comply with which standard?

Fire dampers are critical components in HVAC systems, designed to prevent the spread of fire and smoke through ductwork by closing automatically when a fire is detected. The performance and safety of fire dampers are assessed through testing and certification to ensure they can withstand high temperatures and effectively limit fire passage.

The correct standard that fire dampers must comply with is UL 555. This standard outlines the requirements for the construction and performance of dampers intended to be installed in fire-resistive walls, floors, and ceilings. UL 555 evaluates factors such as fire resistance, operative capabilities, and the ability of the damper to close properly under fire conditions.

Understanding this standard is essential for ensuring proper installation and compliance with building and fire codes, which are crucial for protecting life and property in the event of a fire.