: Includes access to worldwide ASHRAE climatic data (from the 2009 Handbook of Fundamentals) and allows for importing custom weather files.
If you cannot get v7 working, here are truly free psychrometric tools: Ashrae Psychrometric Analysis Cd Version 7-- Free
For over a century, the psychrometric chart has been the silent workhorse of the heating, ventilation, and air conditioning (HVAC) industry. It is the Rosetta Stone for understanding the complex relationship between temperature, humidity, and energy in air. However, manually plotting points, drawing lines, and calculating mixed air properties on a physical chart is time-consuming and prone to error. : Includes access to worldwide ASHRAE climatic data