The CFD Engine of SMARTFIRE is built on robust numerical algorithms and is designed to be as future proof as possible. The numerical engine incorporates a whole host of interaction tools including monitoring and plot-line graphs, 2D slice visualizations, data explorer, function solver, results output and many configuration options that can all be accessed by simply halting the CFD processing. The CFD Engine is now available in 32 bit and x64 bit varients, as well as a parallel version which can use multiple PCs and/or multiple cores.