Although they’re often installed in the same duct systems, fire dampers and smoke dampers serve very different purposes — and selecting the wrong type is a common cause of non-compliance.
Fire Dampers
Fire dampers are designed to stop flames spreading through ductwork. When temperatures reach a trigger point (typically 72°C), a fusible link melts and the blades close, restoring the fire resistance of the wall or floor.
- Tested to AS 1530.4
- Installed in accordance with AS 1682
- Used at fire compartment boundaries
- Require regular inspection under AS 1851
Smoke Dampers
Smoke dampers restrict the movement of smoke, not fire. They are usually linked to the building’s smoke detection or HVAC system and are activated electrically or mechanically.
- Tested for leakage under AS/NZS 1668.1 and AS 1530.7
- Used in pressurisation and smoke control systems
- Typically not fire-rated
Combination Dampers
Some systems combine both functions. These fire/smoke dampers are tested for fire resistance and smoke leakage, and are commonly used in hospitals, high-rise buildings, and public facilities.
Ceasefire PFP Approach
Ceasefire verifies that the correct damper type is installed at each location, and that all sealants, clearances and supports meet the manufacturer’s specifications. Every damper installation is photographed and referenced in our compliance documentation.
Common mistakes include:
- Installing a smoke damper where a fire damper is required (or vice-versa)
- Failing to maintain fusible links or actuators
- Poor sealing around damper frames
- Lack of access for inspection
