Fusible links on fire damper assemblies shall be replaced at least _________ or more frequently as necessary.

Fusible links on fire damper assemblies shall be replaced at least _________ or more frequently as necessary.

• A. Quarterly
• B. Semiannually
• C. Annually
• D. Monthly

Answer: (B)

Fusible links are safety devices that hold a fire damper open and melt at a specific temperature to allow the damper to close during a fire. Because these links are exposed to duct conditions and can corrode, vibrate, or deteriorate over time, they must be replaced regularly to ensure reliable operation when needed. Replacing them at least every six months provides a practical balance between safety and maintenance cost, helping prevent a degraded link from failing to activate the damper in a fire. If an inspection shows corrosion or damage, replace sooner. Monthly or quarterly replacements are not typically required, and an annual schedule could miss early degradation.

Fusible links are safety devices that hold a fire damper open and melt at a specific temperature to allow the damper to close during a fire. Because these links are exposed to duct conditions and can corrode, vibrate, or deteriorate over time, they must be replaced regularly to ensure reliable operation when needed. Replacing them at least every six months provides a practical balance between safety and maintenance cost, helping prevent a degraded link from failing to activate the damper in a fire. If an inspection shows corrosion or damage, replace sooner. Monthly or quarterly replacements are not typically required, and an annual schedule could miss early degradation.