ASHRAE released an app for iPhone, iPod touch, and iPad that allows you to perform comprehensive minimum ventilation calculations for a wide variety of commercial buildings based upon Standard 62.1, using either I-P or SI units. This app is based upon the 62MZCalc.xls. Now, you can make calculations at a meeting and know if your project meets the prerequisite or extra credit, EQc2. http://itunes.apple.com/us/app/hvac-ashrae-62-1/id375374905?mt=8