Six closed air chambers inside the window profiles ensure very high thermal insulation, which has so far been unattainable without the use of additional, costly solutions. By replacing old windows with energy-saving Corona SI 82 windows, the current energy consumption can be reduced by at least 29%. Thanks to modern technology, Corona SI 82 windows eliminate the problem of drafts and water condensation on the window surface.

The high strength of the material from which the energy-saving Corona SI 82 windows are made is not the only advantage of this system. Excellent thermal insulation properties do not negatively affect the appearance of the windows. The frame profiles remain elegant and narrow, allowing much more light through the windows.

Thanks to three independent sealing planes, energy-saving Corona SI 82 windows also provide excellent protection against noise and unfavorable weather conditions. Very high thermal insulation is a guarantee of comfortable well-being. Even during the harshest winter, the temperature on the inner surface of the profiles does not noticeably drop below the room temperature.