pivoting windows are closed by means of four-sided fittings, which lock into their outer frames all around and tighten on all sides. This was the only way to achieve sufficient wind suction protection and [...] correspondingly poor thermal insulation, all windows were replaced in the 1980s by better insulated, plain tilt-and-turn windows. Faithfulness to the original As the formerly highest building in Bavaria, the high-rise [...] the commitment of the Swiss company, which was prepared to develop a testable prototype. This not only made it possible to present the client from the N-ERGIE Aktiengesellschaft with a functioning window