Bertrand Windows and Doors

MB 104


The MB-104 Passive window system with a thermal break, with the highest thermal insulation, meets all requirements for elements used in passive construction.


0.53 W/(m²K)

  1. Modern design.
  2. Windows certified by the Passive House Institute Darmstadt for the SI and Aero versions.
  3. High thermal insulation.
  4. Above-standard tightness and insulation parameters.
  5. Wide glazing range up to 81 mm.
  6. Advanced technological solutions.

The MB 104 system is used to make external architectural elements, e.g. various types of windows, vestibules, shop windows and spatial structures, which are characterized by, in addition to excellent thermal insulation, also very good acoustic insulation, water and air tightness and high structure durability.

The structure of the MB-104 Passive system sections has two variants depending on the thermal energy saving requirements: SI and AERO

The parameters of windows made of elements of the MB-104 Passive system exceed the current requirements of the strictest applicable regulations and standards, which is why the MB-104 Passive system is a system dedicated to energy-saving and passive construction.

Windows in the MB 104 system, SI and Aero versions:


MB 104 SI
MB 104 Aero

Product MB 104 comes in the following versions

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