To download the Auto Demo,please open the following. http://www.pyramid-techno.com/cf_soft.html We have covered the following Models in theCentrifugal Fan in this package 1.Density of Media 2.Impeller3.Casing 4.Performance Curve 5.Thickness Calculation 6.Shaft Design 7.Testing 8.Hub. 9.Coupling. 10.Keys. 11.Foundation design. 12.Costing Drawings: The 2D manufacturing drawings will be generated instantly, along with the basic design.The Centrifugal Fan package will automatically select appropriate type of construction according to design.Package provides following types of construction according to which user has to enter the inputs.User mode:In auto drafting package provides such facilities by which user can modify desired drawing parameters as well as can generate drawing by his own design. Sincerely Swapnil Bhate 9371460739