A manufacturer of glazed and aluminium louvre windows for façades, used both for natural ventilation and as natural smoke and heat exhaust ventilators. Under its SmoTec designation the window and drive combinations are tested and certified as NRWG to DIN EN 12101-2, with each drive certified in combination with the specific profile system; the ventilation range carries the AirTec mark to EN 14351-1. Systems are made to order for façade and roof geometries.