Air Mixing Calculator

Calculate the mixed air temperature and humidity when combining two airstreams. Essential for economizer and makeup air calculations.

Volume flow rate of first airstream.
CFM
Dry-bulb temperature of first airstream.
°F
Relative humidity of first airstream.
%
Volume flow rate of second airstream.
CFM
Dry-bulb temperature of second airstream.
°F
Relative humidity of second airstream.
%

Results

Total Mixed Airflow-CFM
Mixed Air Temperature-°F
Mixed Air Humidity (approx)-%
Percent Airstream 1-%
References: ASHRAE Fundamentals Chapter 1: Psychrometrics; ASHRAE Standard 62.1 Ventilation for Acceptable Indoor Air Quality