The highest level of computerized psychrometric analysis involves the ability to display a complete psych chart on the computer screen. Not only are state point properties automatically calculated, but any psychrometric process desired can be simulated. Points can be labeled as necessary, and lines connecting points are automatically drawn as required by the selected process. Additional advantages include perfect accuracy, the ability to automatically adjust for any elevation, and the ability to print psych charts in full graphic detail. Such sophisticated analysis renders conventional psych charts obsolete.
Some psychrometric software is actually free of charge.
Carrier, Trane, and York have their psychrometric software as parts of a larger software package. Carrier calls their software HVAC Utility programs and Trane calls theirs Applications Engineering Toolbox. Elite Software offers two psychrometric programs. Even though software can take the drudgery out of performing psychrometric calculations, a fundamental understanding of psychrometrics is still required before such software can be profitably used. Unfortunately, the majority of hvac service technicians do not fully understand psychrometrics.