18+ Mixed Air Calculator. 40% percentage of return air (%ra): Calculate the temperature of a mixture of two air streams with different temperatures and percentages.

Enter outdoor and return air conditions, outdoor air percentage, and system parameters to get mixed. Calculate mixed air temperature, humidity ratio, and enthalpy for ventilation systems. A mixed air temperature (mat) calculator is a useful tool for hvac (heating, ventilation, and air conditioning) professionals and enthusiasts.








