Owner-managed since 1995, Schlentzek & Kühn plans, installs, commissions and maintains fire alarm systems, voice alarm systems, smoke and heat extraction and escape-route technology across Berlin, Brandenburg, Sachsen-Anhalt, Thüringen and Sachsen. The firm holds DIN 14675 certification for every phase of fire alarm work — design, installation, commissioning and acceptance, maintenance and modification — together with DIN EN 16763 service-provider status and ISO 9001. Clients include Vattenfall Europe and the Federal Chancellery.