United States calculator
Mix outdoor and return air by airflow
Calculate mixed-air dry-bulb temperature, humidity ratio and outdoor-air percentage from two airstreams.
air-stream mixing box
Project inputs
Mixed Air Calculator results
How this Mixed Air Calculator works
Dry-bulb temperature and humidity ratio are independently airflow-weighted.
Important: A full HVAC design may require enthalpy, pressure, infiltration and psychrometric analysis.
What assumptions should I verify?
Check every entered quantity, unit, rate and rule against the current U.S. source that applies to your project. The calculator does not silently substitute worldwide conventions.
Is information sent anywhere?
No. Calculations run locally in the browser and the module contains no analytics, remote requests or stored personal data.