Economizer Energy Savings Calculator

Calculate annual energy savings from air-side economizer operation based on climate and system parameters.

Total system airflow.
CFM
Minimum outdoor air for ventilation.
CFM
Hours per year with cooling load.
hours
Hours when outdoor air can provide free cooling.
hours
Mechanical cooling efficiency.
BTU/Wh
Average temperature difference during cooling.
°F
Cost per kWh.
$/kWh

Results

Additional Economizer CFM-CFM
Cooling Energy Saved-kWh
Fan Energy Penalty-kWh
Net Annual Savings-$
References: ASHRAE Standard 90.1 Section 6.5: Economizers; ASHRAE Fundamentals Chapter 19: Energy Estimating