How to read a Psychrometric Chart

it's easier than you think

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

What we Know1. Dry bulb temperature 75 DEG F2. Wet bulb temperature 60 DEG F

Now we look at where the two meet

What we can find outDewpoint is 50 DEG FRelative humidity 42%Enthalpy 27 btu/lb

To sum it upDry bulb temperature 75 DEG FWet bulb temperature 60 DEG FDewpoint is 50 DEG FRelative humidity 42% (yellow)Enthalpy 27 btu/lb