Economizer Changeover Calculator

Calculate economizer changeover point and outdoor air enthalpy control settings.

Temperature of air returning from space.
°F
Relative humidity of return air.
%
Enter 1 for temperature, 2 for enthalpy.

Results

Temperature Changeover-°F
Enthalpy Changeover-Btu/lb
Recommended OA Limit-°F
References: ASHRAE Standard 90.1. Energy Standard for Buildings. Air-side economizer control requirements.