Fire dampers are an important part of a building’s passive fire protection system. They are designed to help stop fire and smoke spreading through ventilation ductwork by closing automatically when triggered. Clean Air 24 Seven recently carried out a fire damper inspection for a customer in London. During the visit, our engineers found multiple dampers that failed to close correctly. The faults were caused by several issues, including debris inside the ductwork blocking one damper from shutting fully.
Quick answer: what is a fire damper inspection?
A fire damper inspection is a safety check carried out to confirm whether fire dampers inside ventilation ductwork are accessible, clean, correctly positioned and able to close as intended. The inspection helps identify failed dampers, obstructions, damaged parts, access issues and other faults that could affect fire safety performance.
The customer’s requirement
The customer required a scheduled fire damper test across their London premises. They needed to confirm that the dampers within their ventilation system could be located, accessed, inspected and tested.
Our role was to inspect each accessible damper, test its operation, record the results and provide a clear report showing which dampers passed, which dampers failed and what remedial action may be required.
What Clean Air 24 Seven carried out
Our engineers attended site and completed a methodical fire damper inspection across the customer’s ventilation system. Each accessible fire damper was visually checked and tested to assess whether it would close correctly.
The inspection included:
- Locating and identifying fire dampers within the ductwork system
- Checking whether access was available
- Inspecting the condition of each damper
- Testing damper operation
- Recording pass and fail results
- Photographing defects and areas of concern
- Reporting obstructions, damage and access issues
- Providing clear findings and recommendations
What did the fire damper inspection find?
During the fire damper inspection, multiple dampers failed for different reasons. One of the main issues found was debris inside the ductwork. The debris was physically blocking a damper and preventing it from closing fully.
This is a serious finding because a fire damper that cannot close may not perform as intended during a fire. If the damper remains open or only partly closes, smoke and fire may be able to travel through the ventilation system into other areas of the building.
Other issues identified during the inspection included dampers that did not operate smoothly, dampers that failed to release correctly and areas where access made inspection more difficult.
Why can debris cause a failed fire damper inspection?
Debris inside ductwork can prevent the damper blades from moving freely. Even a small obstruction can stop a fire damper from closing fully, which means it may fail during a fire damper test and may not provide effective protection in the event of a fire.
Debris can enter ductwork for several reasons, including general contamination, previous maintenance work, building works, poor duct hygiene or objects being left inside the ventilation system.
This case study highlights why a fire damper test should never be treated as a simple visual check. A damper may be installed, but unless it is properly inspected and tested, hidden faults such as internal obstructions can be missed.
The outcome for the customer
Following the fire damper test, Clean Air 24 Seven provided the customer with a detailed report. The report listed the dampers inspected, the test results, the defects identified and the areas requiring attention.
This gave the customer the information they needed to plan remedial works, address the failed dampers and improve the safety and compliance of their ventilation system.
By arranging a planned fire damper inspection, the customer was able to identify important faults before they became a more serious risk.
Why regular testing is important
Fire dampers are often hidden inside ductwork, ceiling voids and risers. This means faults are not always visible during routine building checks. Regular fire damper inspection helps confirm whether each damper is accessible, unobstructed and capable of closing correctly.
A failed fire damper can compromise compartmentation and reduce the effectiveness of a building’s fire safety strategy. Regular inspection helps building owners, facilities managers and duty holders understand the condition of their fire dampers and take action where required.
Common questions about fire damper inspection
How often should a fire damper test be carried out?
Fire dampers should be inspected and tested regularly as part of a building’s fire safety and maintenance programme. The exact frequency may depend on the building type, risk profile, system condition and relevant guidance.
What happens if a fire damper fails inspection?
If a fire damper fails inspection, the fault should be recorded and appropriate remedial action should be planned. This may include removing debris, repairing or replacing the damper, improving access, or arranging further investigation.
Can ductwork debris stop a fire damper from closing?
Yes. Debris inside ductwork can block the movement of a fire damper and prevent it from closing fully. This was one of the key faults found during this London fire damper test.
Is a fire damper inspection only a visual check?
No. A proper fire damper test should include checking access, visually inspecting the damper and testing its operation where possible. This helps identify faults that may not be obvious from appearance alone.
Clean Air 24 Seven fire damper services
Clean Air 24 Seven provides professional fire damper testing services for commercial, industrial and residential buildings across London and the UK.
Our team can support with:
- Fire damper inspection
- Fire damper testing
- Fire damper reporting
- Access panel checks and recommendations
- Photographic defect reports
- Remedial recommendations
- Ductwork hygiene observations
Whether you manage a single property or a large multi-site portfolio, Clean Air 24 Seven can provide clear, practical reporting to support your fire safety and maintenance responsibilities.
Need a fire damper inspection in London?
Clean Air 24 Seven can inspect, test and report on the condition of fire dampers within your ventilation system, helping you identify faults before they become a serious issue.
Contact our team today to arrange a professional survey or to ask about other services such as LEV Testing, Air Ventilation System Cleaning and Laundry Duct Cleaning.