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Types of glass

Glasses make windows and doors

It is the glazing that makes an opening a window — or: the model and quality of the glazing are the decisive factors for the functionality of a window. One quality feature of Internorm windows is the glazing manufactured in-house. With three insulating glass lines, Internorm is Austria's largest manufacturer of insulating glass.

The glazing can be used to control the insulating properties of the window and the quality of the relationship between the inside and outside. Internorm achieves the best insulating values with triple glazing as standard glass. But the window can do more: Thanks to the SOLAR+ coating it supplies heat.

Structured glasses prevent a clear view if you do not want anyone to be able to see inside from outside.

Energy-saving glazing

Energy-saving glazing

All good things come in threes


The fact that around 30% of the heat of a house can be lost via the windows is the reason for the increasing demand for high thermal insulation windows. However, it is not generally the glass that creates the thermal insulation properties.

Insulating gap between panes


Heating costs are saved through precious metal coatings that are applied in a wafer-thin layer to the surface of the glass, and noble gases in the gaps between the inner and outer panes. The noble gases used are argon and krypton. They have a much lower heat conductivity than air and thus also reduce the heat loss to the outside. The differences in the thermal insulation value Ug result from different coating structures and noble gases. Furthermore, the thermal insulation values are better with triple glazing than with double glazing.

Triple-pane heat protection glazing


Compared to double glazing, the high insulation properties of the Internorm window systems with triple heat protection glazing allow an increase in glass area of up to 40% without any effect on the heating costs.

The use of this type of insulating glass significantly improves the energy balance and thus keeps the heating costs low. Furthermore, the special SOLAR+ coating allows solar energy gains and therefore additional heating free of charge.

SOLAR+ energy-efficient glass from Internorm

SOLAR+ energy-efficient glass from Internorm

The window as additional heating


The SOLAR+ triple insulating glass has an extremely high thermal insulation. It also has a total energy transmission value (g-value) that can otherwise only be achieved at this level with double glazing. Due to this special relationship between thermal insulation (U-value) and energy transmission (g-value), these glasses are perfectly suited for solar construction. In winter in particular, it utilises the weak solar irradiation optimally and keeps the heat gained in the building. The high g-value allows the gain in passive solar energy to be optimised even if the construction site is not optimal or the glazing is not precisely south-facing.

Here the windows provide the heat


The SOLAR+ triple glazing has an energy transmission that is 20% higher than standard triple glazing. This also increases the solar energy gain by 20%. Free additional heating thanks to the glazing!

The benefit for climate protection


Efficient energy usage is one of the most important measures against climate change. Thanks to the energy-saving triple-pane technology and the innovative special SOLAR+ coating, climate protection windows from Internorm achieve optimal solar gains and guarantee maximum thermal insulation. This reduces the emissions of CO2 and SO2.

More light, more brilliance: SOLAR+


The high light transmission produces a more welcoming brightness inside: an important advantage, particularly in the dark winter months.

Technical values of SOLAR+ triple glazing


Ug values (thermal transmission coefficient of the glass) according to EN 673:

SOLAR+ 36 mm: 4b/12gAr/4/12gAr/b4 Ug 0,8 W/m²K

SOLAR+ 40 mm: 4b/14gAr/4/14gAr/b4 Ug 0,7 W/m²K

SOLAR+ 42 mm: 4b/15gAr/4/15gAr/b4 Ug 0,7 W/m²K

SOLAR+ 44 mm: 4b/16gAr/4/16gAr/b4 Ug 0,7 W/m²K

SOLAR+ 48 mm: 4b/18gAr/4/18gAr/b4 Ug 0,6 W/m²K