Calculate the resulting temperature and humidity of two mixed air streams.
Air Stream 1
°C
%
cfm
Air Stream 2
°C
%
cfm
Calculation Results
Enter parameters to calculate
About this calculator
Overview
In HVAC systems, mixing two air streams (usually outdoor air and return air) is a common process. The properties of the resulting mixture depend on the mass flow rates and properties of the individual streams.
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Pro Tips
Ensure flow units are the same for both streams.
The mixed temperature will always be between the two source temperatures.
For more precise results in high-pressure systems, use mass flow instead of volumetric flow.
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Fun Facts
"Air mixing is used in 'economizer' cycles to cool buildings using cool outside air without using compressors."
"The 'Mixing Ratio' is technically the mass of water vapor per unit mass of dry air."
