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# Air - Maximum Moisture Carrying Capacity

## Maximum water content in humid air vs. temperature.

The maximum moisture content possible in air - at saturation - varies with temperature. The table below indicates maximum moisture content in a cubic metre of air at various temperatures:

Air - Maximum Moisture Carrying Capacity
TemperatureMax.
Water Content
(oC)(oF)(10-3 kg/m3)(10-3lb/ft3)
-25 -13 0.64 0.040
-20 -4 1.05 0.066
-15 5 1.58 0.099
-10 14 2.31 0.14
-5 23 3.37 0.21
0 32 4.89 0.31
5 41 6.82 0.43
10 50 9.39 0.59
15 59 12.8 0.8
20 68 17.3 1.07
30 86 30.4 1.9
40 104 51.1 3.2
50 122 83.0 5.2
60 140 130 8.1
• 10-3 kg/m3 = g/m3

### Example - Moisture Carrying Capacity in Heated Air

Air is heated from 20oC to 50oC.

• from the table above the maximum moisture content in air at 20oC is 17.3 g/m3, and
• the maximum moisture content in air with temperature 50oC is 83 g/m3

The increased ability to carry moisture can be calculated as

100 % ((83 g/m3) - (17.3 g/m3)) / (17.3 g/m3)

= 380 %

This dramatic change is important to explain why heated air is so much more effective than cold air in drying processes.

## Related Topics

• ### Air Psychrometrics

Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

## Related Documents

• ### Air - Humidity Ratio

The mass of water vapor present in moist air - to the mass of dry air.
• ### Air - Moisture Holding Capacity vs. Temperature

The moisture holding capacity of air increases with temperature.
• ### Compressed Air - Water Content

Saturation pressure and maximum water content in compressed air.
• ### Dehumidification - Removing Moisture from Air

Dehumidifying by cooling, adsorption or absorption.
• ### Dry Bulb, Wet Bulb and Dew Point Temperatures

Dry Bulb, Wet Bulb and Dew Point temperatures can be used to determine the state of humid air.
• ### Humid Air - Heating

Enthalpy change and temperature rise when heating humid air without adding moisture.
• ### Humid Air and the Ideal Gas Law

Pressure, temperature and volume in a perfect ideal gas like moist air (air with water vapor).
• ### Moist Air - Cooling and Dehumidifying

Cooling and dehumidifying processes of moist and humid air - sensible and latent cooling.
• ### Moist Air - Degree of Saturation

Humidity ratio of moist air to humidity ratio of saturated moist air.
• ### Moist Air - Density vs. Water Content and Temperature

Density of the mix of dry air and water vapor - moist humid air.
• ### Moist Air - Enthalpy

Sensible and latent heat of moist air.
• ### Moist Air - Partial Pressure and Daltons Law

The pressure in a mixture of dry air and water vapor - humid or moist air - can be estimated by using Daltons Law of partial pressures.
• ### Moist Air - Properties

Psychrometric table with humid air properties like saturation pressure, specific volume, enthalpy and entropy.
• ### Moist Air - Relative Humidity

Relative humidity in moist air is the ratio of partial vapor pressure to air pressure.
• ### Moist Air - Specific Volume

Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air
• ### Moist Air - Water Vapor and Saturation Pressure

Saturation pressure of water vapor in moist air vs. temperature.
• ### Required Air Flow to Remove Moisture

Air flow required to remove vapor production from a room.
• ### Wood Species - Moisture Content and Weight

Weight of green and air-dried fire wood.

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## Citation

• The Engineering ToolBox (2008). Air - Maximum Moisture Carrying Capacity. [online] Available at: https://www.engineeringtoolbox.com/maximum-moisture-content-air-d_1403.html [Accessed Day Month Year].

Modify the access date according your visit.

7.8.15

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