A Baden-Württemberg specialist contractor covering smoke extraction, fire protection and daylight technology from design through installation to round-the-clock maintenance. It holds VdS certification to EN 12101-2 for natural smoke and heat exhaust devices, a separate VdS Errichteranerkennung for stairwell smoke extraction systems, and the ZVEI Errichterzertifikat for smoke extraction systems; it was the first business in Baden-Württemberg certified to DIN ISO 9001 for RWA design, installation and maintenance. Around 3,600 active maintenance customers are on its books.