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ANSI/AMCA Standard 208, Calculation of the Fan Energy Index, Available for Free Download

Energy Efficiency

ANSI/AMCA Standard 208, Calculation of the Fan Energy Index, Available for Free Download

Throughout 2019, Air Movement and Control Association (AMCA) International Inc. is making ANSI/AMCA Standard 208, Calculation of the Fan Energy Index, available for download at no cost in its online store.

The ratio of the electrical power of a reference fan to the electrical power of an actual fan, both calculated at a given airflow and pressure duty point, FEI “levels the playing field,” enabling meaningful comparisons of many different fan types. It was developed by AMCA and its members to replace fan efficiency grade (FEG), the metric introduced in 2010 in ANSI/AMCA Standard 205, Energy Efficiency Classification for Fans.

“FEI is superior to FEG because it includes motors and drives, not just the bare-shaft fan, which is consistent with regulations covering pumps and air compressors,” AMCA Senior Director of Global Affairs Michael Ivanovich said. “It will help to save energy by taking efficient motors and drives into account.

“Additionally, FEI will be easier to enforce because the sizing/selection window needed for FEG is eliminated, and, unlike with FEG, FEI ratings are direct indicators of fan energy use,” Ivanovich continued. “FEG ratings remained consistent with fan size, so inherently inefficient smaller fan sizes had disproportionately high FEG ratings.”

Addendum AO to ANSI/ASHRAE/IES 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, which contains FEI requirements proposed for Standard 90.1, is nearing completion and is expected to be considered for publication by ASHRAE in June. Additionally, a proposal to replace FEG with FEI in the 2021 edition of the International Energy Conservation Code is in place, and FEI is being considered by the California Energy Commission for California’s Title 20 appliance-efficiency regulation.

“With these FEI proposals in place, AMCA is making AMCA 208 available at no cost to assist regulators and code officials,” Ivanovich said.

To learn more about FEI, visit AMCA’s FEI microsite at To browse AMCA publications and standards in AMCA’s online store, visit

About AMCA International

Air Movement and Control Association (AMCA) International Inc. is a not-for-profit association of manufacturers of fans, dampers, louvers, air curtains, and other air-system components for commercial HVAC, industrial-process, and power-generation applications. With programs such as certified ratings, laboratory accreditation, verification of compliance, and international standards development, the association’s mission is to advance the knowledge of air systems and uphold industry integrity on behalf of AMCA members worldwide. For more information about AMCA, visit

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