Wallisellen, Zurich

SVTI Schweizerischer Verein f ̧r technische Inspektionen Wallisellen, Zurich

Architect Heinz Zimmermann, founder of HZDS Architektur f ̧r die Arbeitswelt in Zurich/Switzerland, developed the concept of the non-ventilated double skin faÁade (Closed Cavity FaÁade, CCF). Already in 2005 he used RETROLux A in the outer cavity for the faÁades of the mail distribution center in W‰denswil. Since then the Swiss MINENERGY Certification and the building rules have increa- sed the demands for lowering the SHGC-values with the consequence that today it is hardly possible to build fully glazed faÁades in Switzerland anymore.

Heinz Zimmermann has gained excellent experiences with the system RETROFlex in the Bluewin-Tower, an office tower in Zurich. With those RETROFlex louvers he proofed to fulfil the latest regulations even with a fully glazed faÁade. As the investors of the building furthermore asked for an improved visual transmissi- on during active shading the decision was made to use RETROFlex. Due to the horizontal position of the louvers during high angles of incidence the view from inside to outside and reverse is maintained, simultaneously lowest SHGC-values are achieved.