The 7STARS system is an exclusive QFort product. It is the ideal option for reducing the energy consumption in your dwelling by using the PlanistarSun glass as standard. In addition, the 7STARS system has an appealing design (classic – straight) provided by the hidden hinges, which are also offered in the standard version.

Other technical specifications:

  • PVC profiles with 7 chambers both in the sill and in the frame
  • width of PVC profiles: 85 mm (mounting depth)
  • thickness of the outer wall of PVC profiles ≥ 2.5 mm
  • class S profile, certified for use even during extreme weather conditions in severe climates
  • galvanized steel reinforcement: 1.25 mm – 3.2 mm
  • three types of gaskets
  • easy to clean
  • very high tightness against wind, rain and dust



The 7STARS system is an exclusive QFort product. It is the i

Thermal and sound insulation


The pleasant atmosphere inside your home also depends on maintaining a comfortable temperature throughout the year. All QFort windows have high thermal insulation properties, thus meeting the most demanding needs.


– windows equipped with double thermal insulating glass (24mm): Ug = 1.0 W/m²K, Uw* = 1.15 W/m²

– windows equipped with triple thermal insulating glass (44mm): Ug = 0.5 W/m²K, Uw* = 0.73 W/m²

* The Uw value is calculated for a standard 1230 mm x 1480 mm window with a surface area of 1.82 m² and a warm spacer


To ensure that the relaxed and wonderful feeling inside your home is not affected by the restlessness of the ever-changing external environment, QFort has a number of soundproofing options that you can take into account. Thus, we recommend choosing windows equipped with glass with sound insulation properties specific to the area where you live.

Values: min. 30dB (-1; -4) max. 41dB (-1; -5)

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