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Fire Dampers

If the building you manage has heating, ventilation and air conditioning (HVAC) systems, then the same ductwork that channels air to keep an environment healthy and comfortable, become routes for hazardous gases, smoke, hot air and flames to pass through if a fire breaks out. This is where the fire damper plays an important role.

What are fire dampers?

Fire dampers are louvre-like devices installed where ventilation ductwork crosses a fire-resistant wall, door or curtain. In normal conditions the dampers remain open to allow airflow, but automatically close on the detection of heat or smoke. They are designed to impede the spread of fire, buying invaluable time to evacuate the building.

Effective fire dampers save lives and must be tested by a competent person after they have been installed and at regular intervals using a method known as ‘drop testing’. Previously, under BS:9999 2008, fire dampers were categorised according to their type; a small number needed to be drop tested only every two years; now all fire dampers must be drop tested and cleaned annually.

The big problem is that many buildings have no records of where fire dampers were originally installed, so the building owner or manager is given no clear idea of how many, or where dampers have been installed. To add to that confusion buildings are often altered over several years which, can unwittingly obstruct access to the dampers. Hence fire damper maintenance often falls into non-compliance.

What we do

The Meritas Fire and Security Damper Service:

  • Conduct detailed site survey to identify and locate each fire damper
  • Modify any inaccessible hatches and remove obstructions
  • Carry out fire damper testing, cleaning, fire damper drop test and reset each fire damper
  • Identify any problems and recommend remedial action
  • Carry out remedial work as necessary
  • Certify testing – provide accurate records of fire damper drop testing and cleaning, including before and after photographs of cleaning

More Information

Meritas carry out inspection, testing and remedial works on fire and smoke dampers as well as motorised fire and smoke dampers (MFD’s). Where the MFD’s are linked to the fire alarm system and building management system (BMS) we will carry out a test and inspection to make sure the ‘Cause and Effect’ meets the fire strategy and building regulations.

 We also carry out Fireman’s Override Panel tests to establish the Cause and Effect and whether it meets the Fire Strategy for the building.

Fully Certified

Our customers know that they’re in safe hands with Meritas Fire & Security Protection. We’re fully certified and approved to the highest quality standards.

Learn More

Speak to us today for expert advice or to arrange a quotation

If you have any questions or would like more information about Meritas, then why not contact our friendly team of experts.

Call for expert advice

01621 770 834

Alternatively, email us


Meritas Fire & Security Protection Limited

18 West Station Yard





Find out more information about each of our other active and passive fire protection services.


Fire Compartmentation

Fire Compartmentation is an important part of Passive Fire Protection.


Fire Doors

Fire Doors form part of Passive Fire Protection and are designed to stop the spread of smoke and fire from on fire compartmentation zone to another.



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