This screencast covers a method that can be used to build a 3D model in Google SketchUp, and then export the geometry for use in PyroSim using a SketchUp DXF/STL Export Plug-in.

Links:
SketchUp – http://sketchup.google.com/
SketchUp DXF/STL Plugin – http://www.guitar-list.com/download-software/convert-sketchup-skp-files-dxf-or-stl

This is a short demonstration of using a thin obstruction with ‘fan’ surface properties applied to each side to pull gasses from one ‘room’ to another.

Video:

File Links:

PyroSim File for Fan Demonstration | FDS Input File for Fan Demonstration

This brief tutorial demonstrates how to quickly create stairways using the Copy/Move action and editing multiple obstructions at the same time.

This video is a complete walkthrough of a carport model design and simulation. Based on an example problem presented at an SFPE Advanced FDS training course.