MB 79N

Thermal insulation

Window and door systems with thermal insulation. Extremely low heat transfer coefficient. This system is primarily used for the manufacture of external architectural elements such as: different types of windows, doors, vestibules, shop fronts and spatial structures.


Profile design for slim and resistant window and door structures. Such depths of leaf and frame sections result in a single surface effect on the outside when shut when it comes to windows and an effect of uniform leaf and frame surfaces when it comes to doors.

Standard benefits package

  • Thermal insulation
    The MB-79N system characteristics include a low U heat transfer coefficient value. Omega shaped profiled thermal breaks perform an additional sealing function at the meeting point of the section and interlayer and ridges separating the chamber between internal and external aluminium sections into three parts.
  • Versatility
    A variety of functions, different window and door opening solutions tailored to customer’s needs. A large choice of door options with a variety of threshold designs.
  • Anti-burglar
    Windows and doors up to RC1 – RC3 class can be constructed.
  • Colour options
    A large selection of colours from the standard pallet mean that the requirements of even the most discerning customers can be satisfied. Colours are applied by powder coating or anodising methods.

Technical specification

MB 79N


  • three-chamber
  • window section depths: 70 mm (frame) and 79 mm (leaf) and doors: 70 mm and 70 mm accordingly
  • omega shaped thermal breaks
  • EPDM central gasket

Glazing units

  • between 21 mm and 57 mm in window leaves and 12 mm to 48 mm in fixed windows and doors
  • gaskets made from EPDM synthetic rubber guarantee resistance to ageing throughout many years of usage


  • Siegenia fittings