Fire Damper Maintenance Checklist

A fire damper is installed where ductwork penetrates a fire-rated wall or floor to maintain the fire compartmentation of the building. It operates passively via a fusible link that melts at a defined temperature (typically 72°C), allowing a spring or curtain mechanism to close the damper blades and prevent fire spreading through the duct opening. Fire dampers are a regulatory requirement and must be inspected and drop-tested regularly.

There are two common mechanical types: curtain (folding-blade) dampers, which drop a stack of interlocking blades across the duct, and multi-blade (louvre) dampers driven by a spring. Both rely on a thermal fusible link rather than any electrical signal, which is the key difference from a motorised smoke damper. Where ductwork passes through a compartment line, the damper only works if the surrounding fire-stopping and the damper's fixing into the construction are intact — so fire damper maintenance is inseparable from checking the penetration seal around it.

This page is the maintenance and inspection reference: the physical drop test, fusible link, blade condition and fire-stopping checks an engineer carries out on site. Working out how often each damper is due, and against which risk class, is a scheduling question — use the linked drop test scheduler for next-due dates and an audit-ready record template, and keep this checklist for the work itself.

This checklist is one of 16 in our fire safety maintenance checklists, covering fire dampers, alarms, emergency lighting, sprinklers, risers and fire doors — the statutory checks and their records.