Smoke Damper Maintenance Checklist

A smoke damper prevents the spread of smoke through ductwork and ventilation systems during a fire. It is activated by a signal from the fire alarm system or a dedicated smoke detector, closing (or, in a smoke-control system, opening) automatically to contain or extract smoke within the fire strategy for the building. Smoke dampers are a key element of the building's life safety strategy and must be tested regularly to ensure reliable operation.

Unlike a fire damper, which closes passively on a heat-activated fusible link, a smoke damper is motorised and driven by the fire alarm or smoke-control panel — so its maintenance is as much about the actuator, wiring and signal interface as it is about the blades. Many modern installations use combined fire/smoke dampers, which must satisfy both the mechanical (thermal) and the electrical (alarm-driven) regimes. The page below covers the physical inspection and functional maintenance tasks; for working out next-due test dates against your building's risk class, use the linked drop test scheduler.

The most common reason a smoke damper fails its test is not the damper itself but the chain around it: a seized actuator, a corroded linkage, a wiring fault on the fire interface, or simply a damper buried above a plasterboard ceiling with no access panel. A good smoke damper maintenance regime checks all of those, not just the blade stroke, and records each result in the fire safety log book.

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.