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/lb61.2 °F53.7 °F27.2 Btu/lb
Supply57.2 °F82%57.1 gr/lb54.0 °F51.8 °F22.6 Btu/lb
Outside87.8 °F58%115.0 gr/lb75.8 °F71.2 °F39.1 Btu/lb
Room
DRY-BULB73.4 °F
REL. HUMIDITY50.0%
WET-BULB61.2 °F
HUMIDITY RATIO61.2 gr/lb
DEW POINT53.7 °F
ENTHALPY27.2 Btu/lb
Supply
DRY-BULB57.2 °F
REL. HUMIDITY82.0%
WET-BULB54.0 °F
HUMIDITY RATIO57.1 gr/lb
DEW POINT51.8 °F
ENTHALPY22.6 Btu/lb
Outside
DRY-BULB87.8 °F
REL. HUMIDITY58.0%
WET-BULB75.8 °F
HUMIDITY RATIO115.0 gr/lb
DEW POINT71.2 °F
ENTHALPY39.1 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.