An interactive app for plotting HVAC processes on-the-go. While the full version may have a cost, some versions or "Lite" editions (like the Duct Fitting Database Lite) are free in the App Store .
This is why pros love it. You can generate a professional PDF report showing the psych chart, your points, and the calculated loads (e.g., "Total cooling required: 48,200 Btu/hr"). Ashrae Psychrometric Analysis Cd Version 7-- Free
: Allows users to plot typical processes (cooling, heating, humidification) and perform automated energy calculations. An interactive app for plotting HVAC processes on-the-go
Downloading software without a license is technically piracy. However, because ASHRAE has removed v7 from sale and offers no support, many educators treat it as freeware. If you are a student, ask your professor for a lab copy. If you are a professional, consider buying the current version to support the society—but if budget is zero, v7 is widely available. You can generate a professional PDF report showing