Outdoor Air Enthalpy Control Calculator

Calculate outdoor air enthalpy for economizer control decisions.

Current outdoor dry-bulb temperature.
°F
Current outdoor relative humidity.
%
Return air dry-bulb temperature.
°F
Return air relative humidity.
%

Results

Outdoor Air Enthalpy-BTU/lb
Return Air Enthalpy-BTU/lb
Economizer Status-
References: ASHRAE Standard 90.1, Section 6.5.1 (Air Economizers)