European fire standards have gradually taken over from national standards and are now the reference for fire testing and classification.
The reference for fire resistance testing of doors, closures and windows is the European standard EN 1634-1.
The resistance class is expressed in minutes, which corresponds to the duration of the fire tests (from 15 to 240 minutes).
The success of fire tests is subject to different categories of criteria, depending on the country:
- fire tightness (E)
- Insulation (I) subdivided into 2 categories: I1 and I2
- radiation (W).