Real Project: Fire damper inspections uncover access restrictions and mechanical defects
Clean Air 24 Seven carried out specialist fire damper testing in central London, inspecting 35 fire damper locations within a commercial building. Our two technicians examined the condition and operation of BSB mechanical fire dampers, identifying defects and access restrictions that required further attention.
Fire dampers play an important role in a building’s passive fire protection system. They sit within ventilation ductwork and close under specified fire conditions to help restrict the spread of fire and smoke. Regular inspections and functional testing help building managers identify potential problems before they compromise the intended operation of these systems.
During this project, our technicians uncovered several issues, including inaccessible dampers, missing fusible links, installation concerns and mechanical obstructions. Some dampers operated correctly, while others failed their inspections or could not undergo full testing because of restricted access.
The findings demonstrate why professional fire damper testing involves more than checking whether dampers are present. Technicians must also assess accessibility, installation condition and mechanical operation to provide building managers with an accurate picture of their fire damper systems.
Project Snapshot
| Project | Details |
|---|---|
| Service | Fire damper testing and inspection |
| Location | Central London |
| Site Type | Commercial premise |
| Technicians | 2 |
| Damper Manufacturer | BSB |
| Damper Type | Mechanical |
| Damper Locations Recorded | 35 |
| Recorded Pass Results | 13 |
| Recorded Fail Results | 22 |
| Key Findings | Restricted access, missing fusible links, mechanical obstructions and installation concerns |
| Outcome | Inspection findings and recommendations documented for further action |
The Situation
Clean Air 24 Seven attended a commercial building in central London to inspect and test its fire dampers.
Our technicians assessed 35 numbered locations, checking the condition, accessibility and operation of the installed equipment wherever access allowed.
Although 13 locations achieved Pass results, the inspection uncovered numerous issues that required attention.
Some dampers proved difficult or impossible to access because of unsuitable ductwork openings, ceiling structures or obstructions from other building services. Others had mechanical defects, including missing fusible links and components that prevented the damper blades from operating correctly.
At one location, our technicians found that the expected damper was not present in the wall. This discrepancy highlighted the need to review the building’s damper location records.
The inspection provided valuable information about the condition of the fire damper system and identified areas where further maintenance, access improvements or corrective works were necessary.
The Challenges
The project highlighted several different issues affecting the building’s fire dampers. Our technicians needed to distinguish between equipment that failed to operate, dampers with installation concerns and locations where restricted access prevented complete testing.
The main challenges included:
- Restricted ductwork access: Several existing access openings did not provide adequate access for inspection or testing.
- Obstructions from building services: Sprinkler components and cable trays prevented technicians from reaching certain dampers.
- Ceiling access restrictions: In some areas, fixed ceiling structures or missing access hatches prevented access.
- Missing fusible links: Two dampers lacked the fusible links necessary for their intended operation.
- Mechanical obstruction: A screw obstructed one damper blade and prevented the damper from closing when the mechanism released.
- Resetting difficulties: Access restrictions prevented technicians from resetting certain dampers.
- Installation concerns: Inspectors found dampers incorrectly fitted into walls and a connection involving flexible ductwork.
- Damper location discrepancy: One scheduled location contained no damper in the wall.
Each issue required a different approach. For example, installing a new access door could resolve an accessibility problem, but it would not correct a missing fusible link or an incorrectly installed damper.
Our Approach
Fire Damper Inspection and Identification
Our two technicians inspected the 35 identified fire damper locations, examining the accessible BSB mechanical dampers and their surrounding installations.
They checked relevant components, including damper blades, fixings, fire stopping and ductwork condition.
The team also took photographs to document the condition of individual dampers and support the inspection findings.
This process helped identify which dampers technicians could assess fully and which locations required improved access or further investigation.
Functional Fire Damper Testing
Where access allowed, our technicians checked the mechanical operation of the dampers and assessed their ability to close and reopen.
They documented the different operating positions and recorded the outcome for each location.
Thirteen damper entries achieved Pass results.
However, the inspection also uncovered several problems that affected damper operation.
At one location, the damper failed to close when the technician released its mechanism. Further inspection revealed a screw obstructing the blade. The team recommended removing the obstruction to allow the damper to operate correctly.
Two other dampers lacked fusible links and required replacements.
Some dampers also presented resetting difficulties because their position or surrounding access arrangements prevented technicians from reaching the necessary components.
These findings reinforced the importance of functional testing. Simply locating a fire damper does not confirm that it will operate as intended.
Identifying Access Limitations
Access restrictions created one of the biggest challenges during this project.
Our technicians encountered several arrangements that prevented them from reaching, inspecting or resetting dampers properly.
These included:
- Ductwork access openings positioned at unsuitable angles.
- Riveted duct panels without suitable inspection doors.
- Ceiling areas without adequate access hatches.
- Sprinkler heads and pipework obstructing inspection points.
- Cable trays restricting access to installed dampers.
- Ceiling tiles that technicians could not remove.
At one location, the existing access opening sat too far from the damper to allow suitable resetting.
Our technicians recommended additional duct access doors, ceiling hatches and improvements to obstructed access arrangements.
By identifying these restrictions, the team helped establish which dampers required further access work before technicians could complete the outstanding inspections.
Identifying Installation Defects
The inspection also uncovered concerns with existing damper installations.
Our technicians identified dampers that did not sit correctly within their wall openings and an installation involving flexible ductwork.
They recommended refitting incorrectly installed dampers and replacing the relevant flexible ductwork connection with suitable metal ductwork.
At another location, the team found no damper in the wall despite its inclusion in the inspection schedule.
The recommendation called for an amendment to the building’s damper location drawings.
These findings highlighted the importance of reviewing both the mechanical operation and the surrounding installation when inspecting fire dampers.
Remedial Recommendations and Reporting
Following the inspection, our technicians documented the individual results and outlined the corrective actions required.
Their recommendations included:
- Installing new duct access doors.
- Repositioning unsuitable access openings.
- Providing additional ceiling access hatches.
- Replacing missing fusible links.
- Removing the screw obstructing a damper blade.
- Refitting or replacing defective dampers.
- Reviewing unsuitable ductwork connections.
- Addressing access restrictions caused by sprinklers and cable trays.
- Replacing specified self-drilling screws with rivets.
- Updating the damper location drawings.
Several dampers achieved Pass results but still required attention to their fixings.
This distinction matters. A damper may operate successfully during a functional test while other aspects of its installation require corrective work.
Our team documented these recommendations so the building’s maintenance team could plan the next steps.
The project covered inspection and testing. The available information does not confirm that the recommended remedial works took place during this visit.
The Result
The inspection gave the building’s maintenance team a clearer understanding of the condition, accessibility and operation of its fire dampers.
Our technicians completed the assessment of 35 numbered locations and documented the findings.
The results included:
- 13 Pass results: These locations achieved satisfactory recorded inspection outcomes, although some still required attention to their fixings.
- 22 Fail results: These included mechanical defects, installation concerns and locations where restricted access prevented full testing.
- Access restrictions identified: The team highlighted dampers that required additional or improved access arrangements.
- Mechanical defects documented: The inspection identified missing fusible links, blade obstructions and resetting difficulties.
- Installation concerns highlighted: The team identified incorrectly installed dampers and unsuitable ductwork arrangements.
- Remedial recommendations provided: The findings outlined the corrective work necessary to address the identified issues.
The inspection did not establish that every damper operated correctly or met all relevant requirements. Instead, it highlighted the satisfactory results, outstanding defects and access limitations that required further attention.
What This Project Demonstrates
This central London project demonstrates why effective fire damper testing depends on both accessibility and mechanical operation.
Although the building contained numerous installed dampers, our technicians could not fully inspect or test every location.
Unsuitable access doors, obstructing building services and restricted ceiling spaces prevented complete testing in several areas.
The inspection also showed why building managers should not assume that every accessible damper operates correctly.
Our technicians identified missing fusible links, mechanical obstructions and installation defects that required corrective action.
For facilities managers, building owners and maintenance teams, professional fire damper inspections provide valuable information about:
- Which dampers have achieved satisfactory functional test results.
- Which dampers have mechanical or installation defects.
- Which locations remain inaccessible.
- What remedial works require attention.
- Which dampers need follow-up inspection or testing.
Accurate inspection findings help building managers prioritise maintenance, plan access improvements and maintain reliable records of their fire protection equipment.
This project also demonstrates the importance of transparency. When a technician cannot fully test a damper, the inspection findings should clearly explain why, rather than suggesting the system has passed.
Fire Damper Testing for Commercial Buildings in Central London
Clean Air 24 Seven provides specialist fire damper testing and inspection services for commercial, industrial and public sector buildings throughout central London and across the UK.
We support facilities managers, building owners, managing agents, maintenance teams and organisations responsible for fire safety arrangements.
Our fire damper inspection services help clients identify mechanical faults, access restrictions, installation concerns and equipment that requires further attention.
We understand that building managers need more than a simple Pass or Fail result. Clear findings and practical recommendations help them understand the condition of their equipment and plan appropriate maintenance.
Alongside fire damper testing, Clean Air 24 Seven offers air ventilation cleaning, HVAC duct cleaning, AHU cleaning and LEV testing through its wider ventilation compliance and cleaning services.
Frequently Asked Questions
1. Why is fire damper testing important in commercial buildings?
Fire dampers help restrict the movement of fire and smoke through ventilation ductwork when they activate under specified conditions.
Regular inspections help building managers identify mechanical faults, installation concerns and access restrictions that could affect their operation.
Professional testing also provides documented findings to support maintenance planning and fire safety management.
2. How often should fire dampers be tested?
BS 9999 recommends testing fire dampers following installation and at least annually thereafter.
Some environments may require more frequent inspections, particularly where dust or contamination could affect damper operation.
Building managers should consider manufacturer instructions, applicable fire safety requirements and site-specific risks when planning inspection schedules.
3. What happens if a fire damper fails its inspection?
The next steps depend on the reason for failure.
During this central London project, our technicians identified several different issues, including missing fusible links, mechanical obstructions and unsuitable access arrangements.
Some dampers could not undergo complete functional testing because technicians could not reach them.
The inspection findings should identify the problem and recommend appropriate corrective action before further testing takes place.
4. What happens if technicians cannot access a fire damper?
If technicians cannot reach a damper, they may be unable to inspect its components, release the mechanism or confirm its operation.
They should document the restriction and identify what prevents access.
Depending on the installation, the building may require a new duct access door, an additional ceiling hatch or changes to surrounding obstructions.
Once suitable access is available, technicians can complete the outstanding inspection or testing.
5. Can a fire damper pass its test but still need remedial work?
Yes.
During this project, several dampers achieved Pass results while our technicians still recommended replacing existing screws with rivets.
A successful functional test does not automatically confirm that every aspect of the installation meets the relevant requirements.
Building managers should review both the test result and any additional recommendations.
6. What should a professional fire damper testing report include?
A comprehensive inspection record should identify each damper location, the equipment inspected, the test outcome and any defects or access limitations.
Photographs can help demonstrate the condition of the equipment and support the recorded findings.
Where technicians identify faults, they should explain the problem and recommend the appropriate corrective action.
This information helps facilities managers plan follow-up works and maintain accurate inspection records.
Need Professional Fire Damper Testing?
Whether you manage a commercial office, industrial facility, healthcare building or public sector property, regular fire damper inspections help you understand the condition and operation of your installed equipment.
Clean Air 24 Seven provides professional fire damper testing, inspections and reporting to help identify mechanical faults, restricted access and maintenance requirements.
Our experienced team works with facilities managers, building owners and maintenance providers to support their fire damper inspection programmes.
Contact our Operations Team to discuss your requirements.
Clean Air 24 Seven – Air Supply Compliance and Cleaning Specialists
Website: https://www.cleanair24seven.co.uk/
Call our Operations Team: 0203 640 8247
Email: info@24sevengroup.co.uk