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