The so-called “concealed sash” system has all features of the basic solution SETH, but simultaneously ensures optimum appearance for this type of solution. An additional advantage of the HAPI system is the possibility to glaze it with glass of any thickness using glazing clips featured in the basic version without the need to change the sash profile. The movable post for the “concealed sash” solution in the minimum version has a visual width of only 111 mm. The system includes fixed posts for the assemblies: sash – sash, sash – fixed glazing, fixed glazing – fixed glazing.

HAPI system parameters:

  • installation depth 88mm
  • max. glass thickness 63mm
  • Uw ≤ 0,9 W/m2*K
  • combination with the movable post 111.5mm
  • frame and sash combination 83mm

14 czerwca 2018


The AMON system, with the so-called “steel look” visual style, is constructed based on the solutions of the SoEasy range. It is also the warmest window system in this category…

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The CHEPRI system resembles visually wooden windows in an old-fashioned style. Based on the SoEasy solutions, it is the warmest window system in this category available on market. The system…

14 czerwca 2018