Bertrand Windows and Doors

MB 86N


A window and door system with very good parameters that allows it to meet the various needs of users. The design of its sections has three variants depending on the thermal energy saving requirements: ST, SI and AERO.


0.8 W/(m²K)

  1. Modern design.
  2. Wide thermal breaks with a new shape.
  3. Two-component central seal.
  4. Airgel insulation – a material with excellent thermal insulation.
  5. A wide range of glazing allows the use of all common types of glass.
  6. Advanced technological solutions.

MB-86 is the world's first aluminum window and door system using airgel - a material with excellent thermal insulation.

The advantages of the MB-86 system also include the high durability of the profiles, enabling the construction of structures of large dimensions and weight. A version of windows with a hidden sash, MB-86US, is also available.


Product MB 86N comes in the following versions

MB 86 SI
MB 86 ST

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