Article 17 of the Fire Safety Order, UK wide
Fire Damper Inspections
A fire damper is a hole in a compartment wall that is supposed to close itself. When it does not close, every compartment line the ductwork crosses is defeated at once and nobody sees it happen because the damper sits above a ceiling, behind a duct, behind a plant room door. AL23 Safety inspects, drop tests and records fire and smoke dampers and builds the asset register that makes the next test possible, UK wide.
What is a fire damper inspection?
Proving the thing closes and writing down that it did
A fire damper inspection is a physical examination and functional test of each damper in a building, carried out by a competent person and recorded damper by damper. The test proves that the damper releases on demand and reaches a fully closed, correctly seated position and that the frame, blades, linkages, penetration seal and surrounding fire stopping are intact.
It is not a visual glance through a ceiling tile. A damper can look perfect and still be prevented from closing by three millimetres of grease on the blade edge, a cable tie somebody used to hold it open during commissioning or a duct support fitted through its travel.
Who needs one
Every responsible person with ducted ventilation crossing a compartment line
- Responsible persons under the Fire Safety Order in any building where ductwork passes through fire resisting walls or floors.
- Managing agents and landlords of offices, retail units, hotels and mixed use buildings.
- NHS trusts, care providers, schools and universities with extensive plant and riser distribution.
- Housing providers and accountable persons in blocks of flats with communal extract or smoke control ductwork.
- Facilities managers who have inherited a building with no damper schedule at all.
- Hospitality and catering operators with kitchen extract, where the grease regime and the damper regime meet.
- Anyone whose fire risk assessment carries an open action reading "dampers not tested" that has rolled forward for three years.
The regulations that apply
Your legal framework, in plain terms
The duty is article 17 of the Regulatory Reform (Fire Safety) Order 2005. The responsible person must ensure that the premises and any facilities, equipment and devices provided under the Order are subject to a suitable system of maintenance and are maintained in an efficient state, in efficient working order and in good repair. Fire and smoke dampers are plainly within that description. Article 17 sets no interval and names no standard. The interval comes from your fire risk assessment, informed by the relevant standards and the manufacturer's instructions.
Article 17
The maintenance duty itself. A suitable system of maintenance means a planned regime built on an asset list, not an annual scramble.
Article 9, as amended by section 156 of the Building Safety Act 2022
Since 1 October 2023 the fire risk assessment and the fire safety arrangements must be recorded in full. Your damper testing regime is part of those arrangements so the record has to exist.
Regulation 38 of the Building Regulations 2010
Fire safety information, including damper locations, specifications and maintenance schedules, must be handed over at completion. Missing damper schedules in the regulation 38 pack are the most common reason dampers are never found and never tested.
The Fire Safety (England) Regulations 2022
In force 23 January 2023, imposing separate record and information duties in multi-occupied residential buildings.
Enforcement
Penalties for certain Fire Safety Order offences rose from level 3 to level 5, an unlimited fine, with effect from 1 October 2023.
The standards and what each one is for
BS EN 15650:2010
The product standard for fire dampers in ventilation for buildings, published 30 June 2010. It specifies the requirements, references the test methods and requires automatic closure in response to raised temperature. It covers evaluation of conformity and marking. It excludes corrosive atmospheres.
BS EN 1366-2
The fire resistance test method for fire dampers, sitting under the general requirements of BS EN 1363-1:2020.
BS EN 13501-3
The classification standard for fire resistance performance of products used in building service installations. This is where your damper's E and EI classification comes from, with S added for smoke leakage, for example EI 60 S.
BS EN 12097
Requirements for ductwork components to facilitate maintenance. It governs the provision, size and spacing of access panels so that ductwork and the devices inside it can be inspected, cleaned and tested.
BESA DW145
The Building Engineering Services Association guide to good practice for the installation, design and selection, inspection and maintenance of fire dampers and leakage. It covers the statutory duties in England and Wales and the Fire Safety (Scotland) Regulations 2006, the role of the penetration seal in overall fire stopping integrity and the practical need for maintenance teams to be able to find and reach dampers. We cite the edition current at the date of your survey rather than a version number here.
How often should dampers be tested?
Guidance sets the convention. Your risk assessment sets the duty.
This is where a lot of published advice is more confident than the evidence supports so here is the honest position. BS 9999:2017, the code of practice for fire safety in the design, management and use of buildings, contains routine inspection and maintenance recommendations covering fire dampers. It is a code of practice, not law.
BS 9999 recommends periodic testing of fire and smoke dampers by a competent person. The intervals commonly applied across the industry are one year as a baseline and no longer than two years for standard installations. Dampers serving a critical function or sited in dust-laden, greasy or high-humidity atmospheres, should be tested more frequently than that. We do not quote a specific annex letter and a single figure as though it were a legal requirement because the two positions circulating in the market do not agree with each other and we have not verified which one the standard actually sets out.
What is settled is this. The legal interval is whatever your fire risk assessment and article 17 require, which is a judgement about your building rather than a fixed number. Newly installed dampers should be drop tested at handover as part of commissioning, with the results forming part of the regulation 38 pack. That commissioning test is a separate event from the first periodic test and does not replace it.
The drop test method
The recognised sequence, step by step
- 01
Locate the damper
against the as-built drawings and the damper schedule, then confirm its identity, type, classification and orientation.
- 02
Gain access
through a compliant access panel. Where there is no panel, one must be installed. Cutting an unauthorised hole in fire-rated ductwork or in a fire resisting wall to reach a damper creates a new defect in place of the old one.
- 03
Inspect
the damper, frame, penetration seal, blades, linkages and surrounding fire stopping. Remove debris, dust and grease that would prevent closure.
- 04
Release the damper
by operating the thermal element, the electromagnetic hold-open device or the manual release, depending on type.
- 05
Confirm full closure
The blades must reach the fully closed position and seat correctly, with no obstruction and no partial travel.
- 06
Reset and re-arm
, refitting any fusible link with a new link where the original has been broken or where the manufacturer requires replacement.
- 07
Verify any interface
with the fire alarm, the building management system or the smoke control system, including position indication and any signal to a control panel.
- 08
Reinstate
the access panel and any insulation and fire stopping disturbed during the test.
- 09
Record
the result, pass or fail, with photographic evidence.
This is the industry-recognised methodology drawn from DW145 and general practice. We check it against the current published guidance before each programme rather than working from a laminated card.
Damper types and what the test looks like
Spring return dampers
are held open by a motorised actuator or an electromagnetic device and close under spring force when power is removed or the thermal element operates. Testing means interrupting the power or actuating the control, then watching the blades run to the fully closed position and confirming the actuator re-opens and re-arms cleanly. These are the dampers most likely to be interlinked with the fire alarm so the signal path is part of the test rather than an extra.
Fusible link dampers
are held open mechanically by a link that melts at a set temperature. The link is released to prove closure and replaced afterwards, whether or not it was damaged, where the manufacturer requires it.
Intumescent dampers
work differently and this catches people out. They have no moving parts. A material within the grille or the sleeve expands under heat to block the aperture. There is nothing to drop so there is no drop test. They are inspected instead: correct product, correct installation, no damage or paint contamination, no obstruction of the aperture, intact seal to the surrounding construction. A report that logs a failed drop test against every intumescent damper in a building has misunderstood the asset.
Access and the ductwork cleanliness interface
The single biggest reason dampers are not tested
Grease and dust accumulation is the most common physical reason a damper fails to close. A damper cannot be tested until the duct around it is accessible and a duct cannot be properly cleaned or verified without access panels. The access panel provision required by BS EN 12097 serves both duties at once.
BESA TR19 Air covers internal cleanliness and hygiene management of ventilation systems. BESA TR19 Grease is the specification for fire risk management of grease accumulation in kitchen extract systems, first issued as a standalone document in 2019. Grease in kitchen extract is a fire load and an article 8 and article 17 problem in its own right, before any damper is considered. Combining a TR19 clean with a damper drop test on the same access visit is normal practice and avoids opening the ductwork twice. Where you have both contracts running separately and neither can complete, that is usually the fix.
The finding nobody wants and almost everybody gets
On a first survey, a large share of dampers cannot be found or cannot be reached
The single most common outcome of a first damper survey is that a substantial proportion of the dampers cannot be located or cannot be accessed at all. There is no access panel, the panel is behind a fixed ceiling, a riser has been boarded over or the schedule listing the dampers never made it into the handover pack.
Record those as "not tested, no access", with the reason and the location. An unlocated damper is a live defect on the fire risk assessment action plan, not a blank cell in a spreadsheet. We report them that way deliberately. A return showing 62 per cent tested and 38 per cent inaccessible is an honest position that can be planned and funded. A certificate claiming full completion when a third of the assets were never seen is worse than no certificate at all and it is the document that gets read out at an inspection.
Our process
Find them, reach them, then test them
- 01
Asset discovery
We work from the as-built drawings, the regulation 38 pack and the compartmentation line to build a damper register, then verify it on site.
- 02
Access survey
We identify where access panels are missing or non-compliant and specify what is needed, before anyone books a test day.
- 03
Inspection and testing
Damper by damper, following the recognised method, with the type-appropriate test and photographic evidence.
- 04
Remedials
Failures are graded, priced by discipline and retested after repair rather than signed off on a promise.
- 05
Regime
We set the interval by risk, write it into the fire safety arrangements and align it with the ductwork cleaning programme.
What you get
An asset register and a result per damper
- A damper asset register with a unique reference, location, level, room or riser, type and classification for every damper found.
- A test record per damper: date, tester, method of release used, pass or fail with the closure result and photographic evidence.
- A clear schedule of dampers not tested, with the reason and what is needed to reach each one.
- A remedial schedule split into access works, damper repair or replacement and fire stopping.
- An access panel specification and location plan for the missing panels.
- A recommended testing interval for this building, with the reasoning behind it, ready to drop into your fire safety arrangements.
What we need from you
Drawings, the handover pack and access
- As-built mechanical drawings and the regulation 38 fire safety information pack, if one exists.
- Any existing damper schedule, previous test reports or ductwork cleaning records.
- Access to plant rooms, risers and ceiling voids, plus permits where the work is above height or in a confined space.
- The fire strategy or compartmentation drawings so we know which walls and floors the ducts are crossing.
- A point of contact who can authorise the installation of access panels.
Why AL23 Safety
We report what we could not reach
Accountable
We report what we could not reach as plainly as what we tested. No completion certificate from us covers dampers nobody has seen.
Expert and chartered
Qualified, chartered professionals, reading each damper against the compartmentation line rather than as an isolated asset. Our fire compartmentation surveys and our damper work use the same drawings.
Practical, not just compliant
We scope the work, appoint the right specialist, interpret the results and turn them into an action plan you can actually deliver, sequenced so the access works happen before the test day.
UK wide
We run damper programmes for single buildings and for national estates across the UK.
Find out what you actually have
A drawing review will size the job before anyone attends
Send the mechanical drawings and we will estimate the damper count and the likely access problem. If your existing contractor is already doing this properly, we will say so and leave you to it.
Common questions
Answers, up front
Cannot see your question? Get in touch and we will answer it directly.
Contact usThe law sets no interval. Article 17 requires a suitable system of maintenance and efficient working order and the frequency comes from your fire risk assessment. Industry convention applies one year as a baseline and no longer than two years for standard installations, with more frequent testing in dust-laden, greasy or critical locations. Anyone quoting you a statutory frequency is quoting guidance and calling it law.
It is recorded as not tested with the reason and it becomes an action on your fire risk assessment. The fix is an access panel installed to a compliant specification. Cutting an opening into fire-rated ductwork or a fire resisting wall without a proper panel replaces one defect with another so it has to be specified rather than improvised on the day.
No. They have no moving parts so there is nothing to release. They are inspected for correct product, correct installation, damage, paint contamination, obstruction and the integrity of the seal to the surrounding construction. Any report logging a failed drop test on an intumescent damper has misidentified the asset.
Usually yes. Grease and dust are the most common physical reason a damper will not close and both jobs need the same access panels. Combining a TR19 clean with the damper test on one visit avoids paying twice for access and gives you one set of evidence covering both duties. Our fire safety audits regularly find buildings where the two contracts are running blind to each other.
Cost is driven by damper count, access difficulty, working hours and how much of the estate needs access panels installed before anything can be tested. Access is almost always the bigger number, not the testing itself. A drawing review costs you nothing and gives a realistic count. Send the mechanical drawings and the building size and we will scope it properly.
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