MB-86N EI

The MB-86N EI system is a comprehensive solution for fire-rated windows, doors, and partitions with thermal insulation, designed for use in exterior fire separation assemblies. It enables the construction of operable windows, doors, and fixed glazed partitions, offering fire resistance classes EI30, EW30, and EI15, as well as EI60-rated doors, in accordance with EN 13501-2. Developed on the MB-86N platform, the system provides excellent thermal and acoustic performance, combined with high levels of air and water tightness.

MB-86N EI integrates the functionality of a conventional window and door system with the specialized performance of fire-rated barriers. It delivers strong results in terms of thermal efficiency, durability, usability, and manufacturing technology. Installations executed using this system comply with applicable regulatory and normative requirements—particularly those related to energy efficiency and environmental protection—while ensuring a high level of fire safety. The system is classified as non-fire-spreading (NRO).

Key advantages of the MB-86N EI system:

• Three-chamber aluminum profiles featuring a central insulating chamber positioned between thermal breaks measuring 43 or 42 mm,
• Fire insulation elements integrated into the internal chambers of the aluminum profiles, supported by dedicated accessories and materials used in the interface between the profiles and the glazing,
• EI₂-rated doors do not require fire insulation inserts within the profile chambers, enabling faster fabrication and reduced system costs; in glazed façade applications, inserts are required in frame and transom profiles,
• A broad range of allowable glazing thicknesses supports the use of various insulating glass units, including triple glazing units,
• MB-86N EI windows are supplied as standard with RC2-rated burglary-resistant hardware.