How does the emergency zone inspection visit actually unfold?
The visit takes place in two stages: a documentary review, followed by a physical inspection of the building and installations. The emergency zone (hulpverleningszone) officer generally begins by consulting the technical file provided by the installer (diagrams, operating instructions, test reports) before visiting the site to verify consistency between the plans and the actual situation on the ground.
On site, they walk through the building following the evacuation routes, check the positioning of detectors, manual call points and sirens, then go to the technical room to examine the fire detection control panel. They often request a triggering demonstration to observe the actual behaviour of the installation (signalling, time delays, alarm transmission) rather than limiting themselves to the documents. The duration of the visit depends on the size of the building and the number of detection zones.
What documents does the emergency zone request during the inspection?
The emergency zone systematically requests the complete installation file: detector and control panel layout plans, zoning diagram, operating instructions and installer's certificate of conformity. This file must make it possible to identify, for each detection zone, the type of detector installed and its addressing.
They also request the test reports carried out during acceptance of the installation, in accordance with the requirements of standard NBN S21-100-1 relating to the design and installation of fire detection. Added to these are the building's safety register, equipment technical data sheets (with, where applicable, their BOSEC certification), and the maintenance contract required by standard NBN S21-100-2. The absence of a single one of these documents is often sufficient to postpone validation of the visit, with the officer then requesting their submission within a deadline they set themselves.
What tests are carried out on site during the visit?
On-site tests aim to verify that the installation actually works, not just on paper. The officer generally triggers an automatic detector and a manual call point in different zones, to check the correct display of the alarm zone on the control panel and the effective triggering of sirens or audible devices.
They also check the operation of information transmissions (fault indicators, transmission to a central station if provided), the good condition of the control panel's backup batteries, and sometimes the shutdown of certain functions linked to detection such as smoke extraction or ventilation shutdown, when these interlocks exist. These tests make it possible to compare the actual operation of the installation with what is described in the operating instructions provided by the installer.
What are the most common non-conformities identified in the field?
The most common non-conformities generally do not concern the design of the installation itself, but its daily operation and installation details. They recur from visit to visit, regardless of the type of building.
| Type of non-conformity | Concrete example |
|---|---|
| Display and instructions | Evacuation instructions absent or not updated near manual call points |
| Accessibility | Detector obscured by furniture, false ceiling or storage |
| Safety register | Register not kept up to date, periodic tests not recorded |
| Signage | Control panel not signposted or technical room difficult to locate |
| Maintenance | Absence of maintenance contract compliant with NBN S21-100-2 |
| Undeclared modification | Extension or refurbishment of building without adaptation of detection zoning |
These findings often lead the officer to make minor remarks rather than complete refusal, but their accumulation can lead to an unfavourable opinion.
What happens after the visit if non-conformities are identified?
After the visit, the emergency zone drafts a report listing the findings and, if necessary, an opinion with remarks or conditions to be resolved. This report generally distinguishes blocking points, which prevent commissioning or operation, from minor points to be corrected within a deadline set by the officer.
The operator must then submit evidence of compliance (photos, installer's certificate, update of the safety register) for the file to be closed. In some cases, a follow-up visit is scheduled to verify concretely that the requested corrections have been made, particularly when the non-conformities concerned the actual operation of the detection system.
Who must be present during the inspection visit?
The presence of the building manager or their prevention advisor (preventieadviseur) is expected during the visit, as they know the organisation of the premises and can provide the requested documents on the spot. Their absence often slows down the visit, with the officer having to return to certain points for lack of an authorised contact person.
The presence of the fire detection system installer is also recommended, particularly for the first visit after commissioning, as they can operate the control panel, explain the chosen zoning and answer the officer's technical questions about interlocks (smoke extraction, ventilation shutdown). This three-way organisation (operator, prevention advisor, installer) generally makes it possible to deal with remarks directly on site rather than multiplying exchanges afterwards.