A must have for HVAC & R engineers! This is an interactive and intelligent psychrometric chart program designed for thermodynamics-related industries, especially HVAC and refrigerating. It helps engineers calculate, analyze, draw, edit, print, and export the states and processes of moist air quickly and accurately. This product provides the most accurate and reliable data which strictly comply with 2005 ASHRAE Handbook - Fundamentals. It includes a completely customizable chart on which you can draw many kinds of objects. And all these objects are editable. You can insert this chart into other applications easily.