Set up up to five state points — dry-bulb plus wet-bulb, relative humidity, dew point or enthalpy — in English (Imperial) units. Each point plots live on the chart, connected process-to-process by a colored line, with its properties read off below its box.
Project
Site conditions
Points after the first are named by the process leading to them, e.g. Process 1 » 2.
ft
Sets atmospheric pressure for all points.
CFM
Constant airflow used to convert each process's differentials into a heat load below the chart.