The solar facade as the new standard? Roger Boltshauser in conversation with Peter Märkli and Tanja Reimer. Shedhalle on the ZWHATT site, Regensdorf 03.07.2024 The solar facade as the new standard? Roger Boltshauser in conversation with Peter Märkli and Tanja Reimer. Shedhalle on the ZWHATT site, Regensdorf Wednesday, July 3, 6-8 p.m. Wednesday, July 3, 6-8 p.m.