Schulungsgebaude HWK, Koln

Arch. Sch ̧rmannSpannel AG Bochum

The Chamber of Crafts is characterised by an integrated planning process of HVAC- and daylight technology.The extremely low SHGC-value of 0.07 for the high summer sun is achieved even without solar protection glass and Retro louvers in horizon- tal position within the outer cavity of 3-layer glass. High summer sun without sun protection coating. The low-e coating is located on Pos. 3 and 5. The space between the glass panes is filled with argon. In areas which have been designed for moveable blinds the system RETROLux 50 mm is used.

Window sizes of 3m x 4 m made of two inserts coupled with a central H-profile. The support- ing profiles have an elevation width of 9 mm, the coupling profile of approximately 15 mm. The large glazing is installed into the frame profiles with a suction harnes.

The visual transmission between the 12 mm louvers is 65 %. However, due to the miniatur- ised size the systems appear even more transparent than the RETROLux 50 mm blind with 75 % visual transmission.The vertical support profiles have a distance of only 38 cm.

Spans up to 53 cm are possible. An otherwise necessary sun protection coating of the glasses was not needed. The outer glass panes are made of extra-clear low-iron glass. The excellent SHGC-values (0.07) result from the precise light guiding of the light redirecting profiles and a reflectivity of 96 % of the upper louver side for short-wave light and long-wave length.