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ZAbluefin certified for new AMCA fan energy index

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FEI is a wire-to-air, design-point metric emphasizing compliant fan selections based on operating points
Ziehl-Abegg is the first company worldwide to certify a product range (ZAbluefin) for the new fan energy index (FEI). In 2018, Air Movement and Control Association (AMCA) International introduced FEI to save energy, reduce operating costs, and accelerate decarbonization.

FEI is an energy-efficiency metric for fans inclusive of motors and drives. The calculation method for the new metric is defined in ANSI/AMCA Standard 208, Calculation of the Fan Energy Index. This metric provides a standardized and consistent basis for comparing fan energy performance across fan types and sizes at a given fan duty point. FEI also considers the effects of motors and drives, when included in fan-rating tests.  

FEI has several uses. Fan specifiers can use it to understand and communicate fan-efficiency design intent, while legislative and regulatory bodies can use it to define energy-efficiency requirements of fans. The standard has been written to support the fan industries entrance into energy and construction codes and standards and to support utility rebate programs.  

FEI is a replacement for fan efficiency grade (FEG), a metric currently referenced in model energy codes and standards such as ANSI/ASHRAE/IES 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings; ANSI/ASHRAE/USGBC/IEC 189.1, Standard for the Design of High-Performance, Green Buildings Except Low-Rise Residential Buildings; and the International Energy Conservation Code and in federal regulations in several Asian countries. FEI will replace FEG in energy codes, standards, and regulations as it is adopted through change proposals as part of routine revision cycles.  

Twenty-seven ZAbluefin centrifugal fans with GR modules in several combinations using different motors are certified as are the former product range Cpro and C. Ziehl-Abegg has operated the world's largest combined measurement and test chamber for fans in Künzelsau since 2008. Ziehl-Abegg believes that state-of-the-art, high-precision measuring instruments and regular training for employees, combined with routine inspections by external organizations such as AMCA and TÜV, are essential to continuing to inspire customers’ total confidence in its products.  

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, its 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 www.amca.org.


Ziehl-Abegg (Kuenzelsau, Germany) is one of the leading international companies in the field of ventilation, control and drive technology. In the 1950s, Ziehl-Abegg developed the basis for modern fan drives: external rotor motors, which are still seen as state-of-the-art worldwide. Another area of business is electric motors which provide the power for elevators, CT imaging equipment and deep-sea underwater vehicles, among other applications. With the introduction of the ZAwheel in 2012 the company established itself in the sector of electro-mobility as part of the Ziehl-Abegg Automotive Team.  

The high-tech company has an impressive innovative capability. Ziehl-Abegg employs 2,250 personnel in its production plants in southern Germany. The company has a global workforce of 4,100 spanning 16 production plants, 29 subsidiaries and 111 sales locations. The products, approximately 30,000 in all, are sold in more than 100 countries. Turnover in 2018 totaled 583 million euros, with exports accounting for three quarters of the figure.  

Emil Ziehl founded the company in Berlin in 1910 as a manufacturer of electric motors. After WWII the company’s headquarters were relocated to southern Germany. Ziehl-Abegg SE is a family-owned company. For more information go to www.ziehl-abegg.com