Burglar-resistant ventilation grilles from Metal Quartz combine controlled air supply with proven resistance to manual burglary attempts. They are intended for applications where ventilation is functionally indispensable but the building envelope must at the same time remain protected against controlled attacks, such as data centers, technical rooms, secured warehouses, prison and justice buildings, or access zones with increased risk. The grilles are tested according to EN 1627–1630 and are available in different resistance levels (RC3, RC4, and RC5). The tests are carried out by an accredited laboratory (CNPP), ensuring that the performance level is formally demonstrated.
Standards and performance
The basic performance is burglary resistance in accordance with EN 1627–1630, with classes RC3, RC4, or RC5 depending on the project risk and chosen configuration. These classifications follow fixed test scenarios (static, dynamic, and manual attacks) with defined tool sets and test durations; the result is an objective performance level for the entire grille solution.
Airflow and security function
Not only security is a key consideration, but ventilation is also an important aspect. Depending on the adjusted dimensions and the selected resistance level, the burglar-resistant ventilation grilles achieve an airflow rate of approximately 50% to 70%. This ensures that the necessary air renewal or heat dissipation (for example in a data center or technical shaft) can continue, while the grille forms a controlled barrier against intrusion, destructive manipulations, and tool-based attacks as defined in EN 1627–1630.
Custom dimensions and modular logic
All grilles are custom-made within the ranges specified in the technical data sheet. The internal bar layout differs by class and determines the security and airflow characteristics. By placing multiple elements side by side, an entire wall or façade zone can be adequately protected and ventilated.
Installation variants for every context
The burglar-resistant ventilation grilles are designed for three installation methods: tunnel installation, in-wall mounting, or hybrid construction. Each scheme determines the position of the attack side and the secure side and can be adapted to the architectural context (concrete façade, internal wall, recess). These variants, illustrated in the technical sheet, ensure that designers can choose an appropriate integration without compromising the required class.
Anchoring to the structure
For installations in concrete walls, fastening is done with M12 threaded rods, with the standard nut replaced by a tamper-resistant nut. The exact type and length of the anchors are determined by the installer according to the wall typology.
Burglar-resistant ventilation grilles: Finish and corrosion protection
Depending on the class, different finish options are available. For RC3 and RC4, the data sheet provides galvanization and, if desired, finishing in any RAL color. For RC5, a galvanized (galva) finish is provided. The chosen finish contributes to durability in indoor or outdoor applications and can be aesthetically aligned with the environment.
Integration with other secured building components
The fixed grilles are approved by CNPP for installation in the structure and for integration into other products with equivalent burglary resistance. Examples include steel doors or modular partition walls (Bunkerkit) validated in the same RC class. This results in a coherent total solution where ventilation and access security come together.
Maintenance and inspection of burglar-resistant ventilation grilles
Burglar-resistant ventilation grilles are passive security products. Periodic visual inspections of fastenings, bars, coatings, and joints help ensure integrity over their lifespan. In case of modifications to the structure or installation techniques (e.g., additional cable ducts), it must always be verified that the burglary-resistant envelope remains intact. The general maintenance logic follows the construction and installation guidelines in the data sheet.
Project support and documentation
For tendering and execution, the official test reports and current technical data sheets serve as the reference. They document the class, installation principles, and application limits (dimensions, variants, finishes). In projects where multiple disciplines come together (HVAC, electrical, security), early coordination around grille dimensions, airflow, and installation position is recommended to ensure the intended ventilation and security class are achieved.
FAQ on burglar-resistant ventilation grilles from Metal Quartz
A burglar-resistant ventilation grille is tested according to EN 1627–1630 and withstands defined manual attacks. Standard grilles do not have this tested resistance.
Depending on dimensions and class, the airflow typically ranges from 50% to 70%. This allows sufficient ventilation while maintaining the required security level.
For concrete walls, the data sheet specifies M12 threaded rods with tamper-resistant nuts. Joints < 3 mm are finished with sealant; > 3 mm with cement.
