EN 1366-2 is a European test standard for the fire resistance of fire dampers. It describes how a damper should be installed in a test wall or floor, how the furnace exposure is applied and how the performance is evaluated over time. EN 1366-2 is not a product standard or a certification label by itself, but the results from the tests are used for classification under EN 13501-3 and for CE marking under EN 15650.
Understanding EN 1366-2 is important for correctly interpreting fire damper documentation and for making sure that the selected product and installation details match the intended use in a given building project.
What is tested in EN 1366-2?
In an EN 1366-2 test, the fire damper is mounted in a representative section of wall or floor. The duct, supporting construction, fixings, insulation and other details are all specified so that they reflect realistic installation conditions. The assembly is then exposed to a standardised fire curve in a furnace.
During the test, several criteria are monitored, for example:
- integrity (E): whether flames or hot gases pass through the damper or around it
- insulation (I): whether the temperature on the unexposed side rises above the permitted limits
- the ability of the damper to open and close, if required
- deformation, leakage and other functional aspects
The damper must perform acceptably for the declared fire resistance period, such as 60 or 90 minutes. The exact conditions of the test, such as wall type, thickness, orientation and duct size, are documented in the test report.
From EN 1366-2 test to EN 13501-3 classification
The test results from EN 1366-2 are then used to classify the damper according to EN 13501-3. The classification might look like EI 90 (ve ho i↔o), indicating the fire resistance time, the type of supporting construction and the permitted orientations and duct configurations.
This classification is important for designers, because it defines:
- the maximum fire resistance time the damper can be used for
- whether it can be installed in walls, floors or both
- which construction types and details are covered by the test evidence
Only installations that fall within the scope of the classification can be considered documented by the test.
How EN 15650 and CE marking relate to EN 1366-2
EN 15650 is the harmonised product standard for fire dampers. It sets out the requirements for performance, durability, marking and the content of the Declaration of Performance (DoP) that is needed for CE marking under the Construction Products Regulation.
As part of this process, the manufacturer must have the damper tested in accordance with EN 1366-2 and classified in accordance with EN 13501-3. The test and classification results are then referenced in the DoP and used to define the declared performance of the product.
How designers and installers should use EN 1366-2 information
For designers and installers, EN 1366-2 is mainly relevant through the product documentation. When working with a specific fire damper, it is important to:
- check which tests and classifications the product is based on
- verify that the intended installation situation matches the tested and classified conditions
- follow the installation instructions for wall or floor type, orientation, clearances and fixings
- ensure that any system-specific conditions, such as pressure, medium or temperature, are within the documented limits
If the planned use falls outside the scope of the documented testing and classification, the designer must obtain additional evidence or choose a different solution.
How FireSep uses EN 1366-2 in product documentation
FireSep fire dampers are CE marked in accordance with the Construction Products Regulation (CPR 305/2011/EU) and manufactured in compliance with EN 15650. The fire damper has been fire tested in accordance with EN 1366-2 and classified in accordance with EN 13501-3. Documentation and classification are based on tests carried out by the Danish Institute of Fire and Security Technology (DBI).
This product documentation in accordance with harmonised European standards forms the basis for the design and documentation of fire safety solutions in buildings, including buildings designed in compliance with the Danish Building Regulations (BR18), provided the actual application and installation are within the scope of the documented testing and installation conditions. FireSep supplies the necessary documentation so that designers, installers and building owners can verify that the selected damper type is correctly applied in each project.