Option
Historic box windows are magnificent, multi-faceted components that have survived over a century due to their material quality and repairability and have shaped the cityscape of Vienna. Their worth of preservation is also due to the modular structure with the potential for building physical optimization.
Retrofit - the combination of old and new
By supplementing modern technologies with the WienerKomfortFenster, historic box windows can largely be preserved and made competitive again with regard to energy efficiency, comfort and sound insulation. The box window is essentially preserved. Only the inner sash is replaced by a modern wooden interior window element. Installation is quick and unproblematic. Resource consumption and environmental pollution for new production, disposal and transport can be saved and the useful life is extended by further decades.
