Since humans feel comfort based on a mix of temperature and humidity, the chart helps designers find the "sweet spot" for indoor environments.
Find your Dry Bulb value on the bottom axis and move vertically. Then, find your Relative Humidity curve. Where these two lines intersect is your "State Point." 3. Trace to Other Properties how do you read a psychrometric chart
Before we read the map, we need to understand the territory. Air is a mixture of dry air and water vapor. Since humans feel comfort based on a mix