The CTT Systems Zonal Comfort System has been ordered by Jet Aviation for a Boeing 767-300ER and is being installed as part of a major executive interior completion project by Jet Aviationās Basel, Switzerland facility. The Swedish-built system is designed to maintain a 20-percent humidity level throughout the entire cabin without causing damaging ārain in the planeā condensation between the cabin walls and aircraft skin. Jet Aviation in Basel has already installed the system, made by CTT in Nykoping, Sweden, in a Boeing Business Jet, an executive 747 and another 767.