1. How to read a Psychrometric Chart
it's easier than you think

2. What information you need. Any 2 of the 6 air measurements below
• dry bulb temperature • moisture content
• wet bulb temperature • dew point temperature • enthalpy
• relative humidity

3. What we Know 1. Dry bulb temperature 75 DEG F 2
What we Know 1. Dry bulb temperature 75 DEG F 2. Wet bulb temperature 60 DEG F

4. Now we look at where the two meet

5. What we can find out Dewpoint is 50 DEG F Relative humidity 42% Enthalpy 27 btu/lb

6. To sum it up Dry bulb temperature 75 DEG F Wet bulb temperature 60 DEG F Dewpoint is 50 DEG F Relative humidity 42% (yellow) Enthalpy 27 btu/lb