Psychrometric chart

Heat and moisture

States of moist air and the processes applied to it: mixing, heating, cooling and adiabatic humidification.

Psychrometric calculator

The psychrometric chart for moist air: computes the properties and models air treatment processes.

Psychrometric chart

Comfort zone10%20%30%40%50%60%70%80%90%100%0510152025-10°C0°C10°C20°C30°C40°C50°CHumidity ratio d, g/kgTemperature t, °C
Current state
Air treatment process
Comfort zone
Temperature
20.00°C
Humidity
50.00%
Humidity ratio
7.25g/kg
Enthalpy
38.51kJ/kg

Additional parameters

Dew point
9.3°C
Wet bulb
13.7°C
Density
1.199 kg/m³
Partial pressure
1167 Pa

Air conditions

Air treatment process

Comfort zone

Correction needed
  • • Dehumidification required down to 45%
To GOST 30494-2011 “Residential and public buildings”

Help

Psychrometric chart — a graphical representation of the thermodynamic properties of moist air.

Humidity ratio (d) — grams of water vapour per kilogram of dry air.

Enthalpy (h) — the total heat energy of moist air.

Dew point — the temperature at which moisture begins to condense.