Psychrometric + Duct Calculator is a precise application suite for HVAC&R (Heating, Ventilation, Air Conditioning and Refrigeration) engineers. The psychrometric chart included in this bundle utilizes ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) equations. It supports both metric and imperial systems. Psychrometric + Duct Calculator can load and save data for each input grid. It can also load all previously entered data every time you need to start the tool. Psychrometric + Duct Calculator uses the IAPWS-IF97 equation for water/vapor properties calculations. The humidity and dry bulb temperature ratio axis can be easily changed, with efficient automatic chart generation that can be exported as bmp and wmf files and printed easily. The Program supports normal and eastern (China) styles. Duct Calculator has features that calculate round/rectangle and air/liquid cross sections, and environmental heat changes, as well as adiabatic effect and duct flow resistance. Psychrometric + Duct Calculator is a complete software suite with valuable features for engineers.