From MAP (Blackpool, Lancashire, UK), CAD-Duct is a bolt-on application for AutoCAD Releases 14 and 2000 that provides the user with a host of functions to draw 3-D ductwork on to a building layout drawing. All ductwork drawn can be coordinated with other services and construction items. Items drawn with CAD-Duct are stored as 3-D models meaning that the drawing can be worked on from any elevation to aid coordination.