A family-run Sauerland engineering firm of more than fifty years’ standing, specialising in daylight, ventilation and smoke extraction in industrial buildings, including glass-roof refurbishment on factory halls and periodic RWA inspection and maintenance. It is a ZVEI-certified Errichter und Planer for smoke and heat exhaust systems and is certified to DIN EN ISO 9001, with SCC safety certification and TRGS 519 asbestos competence for refurbishment work.