CTT Systems AB (publ) designs, manufactures, and supplies humidity control products for aircraft worldwide. The company offers humidifiers and dehumidifiers for passenger cabins, flight decks, crew rest compartments, and VIP/business jets; and active moisture control systems, as well as anti-condensation protection. It serves commercial airliners and private jets. CTT Systems AB (publ) was incorporated in 1991 and is based in Nyköping, Sweden.