Light-diffusing Triple Insulating Glass with Optimized Ug-value

OKALUX K light-diffusing insulating glass offers numerous advantages: The capillary slab in the cavity allows for an even and shadow-free illumination with daylight deep into the room. The sun and glare-protection are very good, the heat insulation excellent and the transmission values individually adjustable to the requirements.

In comparison to the product variants OKALUX and OKALUX+, OKALUX K achieves an optimized Ug-value thanks to an intermediate pane and a functional layer in combination with a gas-filled cavity.

High Functionality

  • Optimal, even illumination of the room, without hard shadows
  • Effective sun and glare protection
  • High light transmission, light entry can be adjusted individually
  • High colour rendering
  • Good heat and sound insulation
  • Protection from UV rays
  • Bird-friendly solution
  • Fire protection according to requirements


  • Daylight entry reduces amount of artificial light required
  • Reduction of cooling loads in summer
  • Fully recyclable
  • Long-Lasting, maintenance-free and easy to clean

Attractive Aesthetics

  • Attractive appearance
  • Vivid surface with depth effect
  • Capillary inserts can be printed with colour and décor

User Comfort

  • Comfortable daylight atmosphere
  • Effective privacy protection
  • Reduced amount of solar input into the building

OKALUX K – Build-up vertical glazing: Façade

Build-up vertical glazing

OKALUX K – Build-up horizontal glazing

Build-up horizontal glazing

Build-up and principle of function

  • Maximum dimensions: 1,230 mm x 4,000 mm, larger sizes available upon request

  • All technical values, such as light transmission, TSET and Ug-values can be varied by using other constructions and glass types.

  • The Ug-value for the various versions is dependent, among other things, on:
    • the functional coating on surface ##2
    • the outer cavity between panes (8, 10 or 12 mm)
    • the filling gas in the cavity (Air/Argon/Krypton)
    • the thickness of the capillary insert 
  • TSET and light transmission depend on:
    • the design of the light-scattering inserts
    • the functional coating on surface #2


Total Thickness

Ug-value [W/(m2K)]



Triple Glazing mm Krypton Argon Air (%) direct (%) direct

from 30

0.8 1.0 1.2 15 - 38 15-42



Product Family OKALUX: Comparison of Ug-Value depends on Installation

Comparison of the Ug-values depending on the position of installation

References Overview