Chasm Consulting will soon release the latest version of VentSim Visual (Version 4) that will include many new features to improve fan data input, new import file formats and many othe enhancements - see link to Chasm Software http://www.ventsim.com/news-articles/ventsim-visual-4/ The good news is that current Ventsim maintenance holders will be able to upgrade at no additional cost. In addition, the final beta testing of PumpSim™ has been progressing well and the software is also expected to be available in the near future. Newgrange has been involved in the beta testing and is looking forward to the commercial release of the software.