Share Email Facebook Twitter LinkedIn MEPAnalyticalSystem.GetAirSystemData Method Returns the air system data, null if not available. Namespace: Autodesk.Revit.DB.MechanicalAssembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0) Syntax C# public AirSystemData GetAirSystemData()Return ValueAirSystemData See AlsoReferenceMEPAnalyticalSystem ClassAutodesk.Revit.DB.Mechanical Namespace