The diagonal lines sloping downward from left to right. What it is: These lines represent evaporative cooling potential. They typically follow the same angle as the enthalpy lines (discussed below) but are slightly offset. How to read: If you have a Wet Bulb temperature, you follow these diagonal lines to find your state point.
Understanding a psychrometric chart is a fundamental skill for HVAC technicians, engineers, and building scientists. While it may look like a chaotic web of overlapping lines, it is actually a precise map of how air and water vapor interact. By mastering this tool, you can predict how air will behave when it is heated, cooled, or humidified. What is a Psychrometric Chart? how do you read a psychrometric chart
Reading the chart is essentially a game of "connect the dots." Follow this process to find the state of your air: 1. Identify Your Known Points The diagonal lines sloping downward from left to right
Once you have your point, trace lines to each axis to extract data: How to read: If you have a Wet
Follow the to find the Wet Bulb temperature.