Psychrometric Chart How To Read [upd] Guide
The temperature of air if it were cooled to 100% relative humidity by the evaporation of water.
To read the chart, you only need . The intersection of these two lines gives you one unique point—the "state point." psychrometric chart how to read
Follow the diagonal lines (usually slanting from top-left to bottom-right) to the scales on the upper-left boundary. The temperature of air if it were cooled