PSYCHROA THERMODYNAMIC PROPERTIES TOOL
SEA LEVEL · 14.696 psi

INTERACTIVE AIR PROPERTY TOOL

Psychrometric workspace.

Plot air conditions. Read the physics. Understand the process.

SaturationRelative humidityState point
PSYCHROMETRIC CHART

Moist air at standard pressure

IMPERIAL
32405060708090100110120030609012015018021020%40%60%80%RoomSupplyOutsideDRY-BULB TEMPERATURE (°F)HUMIDITY RATIO (grains/lb dry air)Click anywhere below the saturation curve to add a point
STATE POINTS

Your plotted conditions

3 POINTS
CONDITIONDRY-BULBREL. HUMIDITYHUMIDITY RATIOWET-BULBDEW POINTENTHALPYACTIONS
Room73.4 °F50%61.2 gr/lb61.3 °F53.6 °F19.5 Btu/lb
Supply57.2 °F82%57.1 gr/lb53.6 °F51.8 °F14.9 Btu/lb
Outside87.8 °F58%114.9 gr/lb76.2 °F71.2 °F31.5 Btu/lb
Room
DRY-BULB73.4 °F
REL. HUMIDITY50.0%
WET-BULB61.3 °F
HUMIDITY RATIO61.2 gr/lb
DEW POINT53.6 °F
ENTHALPY19.5 Btu/lb
Supply
DRY-BULB57.2 °F
REL. HUMIDITY82.0%
WET-BULB53.6 °F
HUMIDITY RATIO57.1 gr/lb
DEW POINT51.8 °F
ENTHALPY14.9 Btu/lb
Outside
DRY-BULB87.8 °F
REL. HUMIDITY58.0%
WET-BULB76.2 °F
HUMIDITY RATIO114.9 gr/lb
DEW POINT71.2 °F
ENTHALPY31.5 Btu/lb

Selected: Room — click another row or chart point to inspect a different condition.

AIR PROCESSES

Connect states & calculate capacity

0 CONNECTIONS
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Choose two state points and an airflow to calculate the process capacity.

Sensible = 1.08 × CFM × ΔT · Total = 4.5 × CFM × Δh · Latent = Total − Sensible. Positive values add heat; negative values remove heat.