Foto: Wohnhaus der SolarCity

Development of a Window for Passive-Housing Featuring an Integrated Sun Shield

Development of a laminated wooden/aluminum window for a passive-housing featuring an integrated sun shield in the shape of blinds or of folding net curtain.

Content Description

Status

finished

Summary

According to the values measured, three different types of laminated wooden/aluminium windows with integrated sun shield can be distinguished:

   ed[it]ion4
one-glazing

ed[it]ion4
zero-glazing

ed[it]ion4 passiv
one-glazing
U-value PHI Feist 0,98 0,92 0,88
U-value measuring ift 0,95 0,89 0,85
g-value 0,55 0,48 0,48
z-factor Jalousie 0,10 bis 0,18 0,09 bis 0,17 0,09 bis 0,17
z-factor Faltstore 0,07 0,07 0,07
Sound absorption 43 dB 43 dB 43 dB

According to the Passiv Haus Institut of Wolfgang Feist a window with an U-value below 0,80 with coating of the inner side of the outlying pane is feasable. Due to the coating a U-value of 0,74 instead of 0,88 respectively 0,78 instead of 0,92 can be reached. Internorm does not, however, offer this product, since the coatings - at present technical standards - lead to streaks during cleansing. The further development of the coating technology is observed carefully by Internorm.

Advantages and disadvantages of the new window

Advantages

  • More effective in ordering, assembly, and maintenance
  • Shorter period of construction
  • Minimizing thermal bridges due to the ommission of an exterior sun shield
  • Essentially higher lifetime due to integration in window
  • High sound absorption (43 dB)
  • More cost-effective because of the omission of the exterior sun shield, however somewhat higher costs for the laminated window
  • Significantly lower cleaning maintenance of the sun shield
  • Casement and strength of frame are minimized and no wider than they have been
  • Can be applied to facades under monument protection
  • Blinds regulate the incidence of light much more precisely than shutters can do
  • Contrary to exterior blinds, they also work in strong winds

Disadvantages

  • Integrated shading may not be as efficient as outside shading but very close to it.
  • Due to physical reasons in combination with certain climatic conditions there can be dew water or mist on the inner side of the outlying pane.

Naming of edition 4

The naming of the new window system is based on the plattform edition by Internorm. The appendix 4 staands for the four technical advantages:

  • Thermal insulation
  • Sound absorption
  • Sun protection
  • Protection against insight

Project Partners

Project manager: DI Thomas Walluschnig
Internorm Fenster International GmbH
Partners:
  • DI Helmut Schöberl
    Schöberl & Pöll OEG
  • Univ. Ass. DI Dr. Thomas Bednar
    TU-Wien, Institut für Baustofflehre, Bauphysik und Brandschutz, Fachbereich Bauphysik
  • DI Peter Bauer
    Werkraum ZT OEG,

Contact

DI Thomas Walluschnig
Internorm Fenster International GmbH
4050 Traun, Ganglgutstraße 131
Tel.: 07229/770/3188
Fax: 07229/770/3151
E-Mail: thomas.walluschnig@internorm.com

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