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CTT Systems AB (publ) is a Sweden-based technology company specializing in humidity control systems for the aviation industry. Incorporated in 1991 and headquartered in Nyköping, it develops, manufactures, and sells innovative products that address moisture issues in aircraft, enhancing passenger comfort, crew well-being, and operational reliability while reducing environmental impact. Its portfolio includes the Zonal Drying System to prevent condensation, Cair for moisture management and cabin humidification, Crew Humidifiers for rest areas, and Cair VIP tailored for private jets under the Humidifier Onboard brand. The company operates through business units like CTT Systems for core humidity solutions, Bribo Mekaniska for stamped metal components, and Catron Elektronik for communication equipment. Serving over 50 major airlines and collaborating with giants like Boeing and Airbus, CTT Systems supplies systems for new aircraft production and retrofits existing fleets. With a focus on aftermarket services matching the 20-year aircraft lifecycle, it holds niche dominance in long-haul aircraft humidifiers and anti-condensation technologies, employing around 85 people and driving sustainable aviation advancements.