ANSI/AMCA 220-05 (rev. 2012) Laboratory Methods of Testing Air Curtains for Aerodynamic Performance Ratings is available on the AMCA Website for no charge (for a limited time only) at the AMCA bookstore.ANSI/AMCA 220-05 (rev. 2012) Laboratory Methods of Testing Air Curtains for Aerodynamic Performance Ratings is available on the AMCA Website for no charge (for a limited time only) at the AMCA style="font-size:11.0pt">AMCA publishes its own standards for equipment testing and rating. We also participate in the development of codes and standards published by others. Currently, national codes and standards bodies, and the U.S. Dept. of Energy, are in the process of adopting fan-efficiency requirements.

For an overview and timeline of these initiatives, read the article Fan Efficiency Regulations - Where Are They Going?, by Michael Ivanovich, Director of Strategic Energy Initiatives, AMCA International.

Below are reports and links to supporting information regarding codes/standards activities where AMCA is active in the U.S. market:


AMCA Standard 205: Energy Efficiency Classification for Fans

ANSI/AMCA Standard 205-12 defines the classification for fans. The scope includes fans having an impeller diameter of 125 mm (5 in.) or greater, operating with a shaft power of 750 W (1 hp) and above, and having a total efficiency calculated according to one of the following fan test standards:

  • ANSI/AMCA 210 / ANSI/ASHRAE 51 Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating
  • ANSI/AMCA 230 Laboratory Methods of Testing Air Circulating Fans for Rating and Certification
  • AMCA 260 (induced-flow exhaust fans) (coming soon)
  • ISO 5801 Industrial fans -- Performance testing using standardized airways
All other fan types are excluded. The standard only applies to the fan, not the fan drive or the fan system

AMCA 205 can be used by legislative or regulatory bodies for defining the energy efficiency requirements of fans used in specific applications.

ANSI/AMCA Standard 205-12
is available from the AMCA bookstore at no cost for electronic copies (PDF files). To order hardcopies or to download PDFs, click here.

To download a free copy of the current version of AMCA 205, click here:

Translations of the original 2010 version of AMCA 205 are available at no in three languages:

Manufacturers can estimate FEG ratings for their fan lines in accordance with AMCA 205 and provide FEG ratings data in catalogs and electronic product-selection software. They also can have FEG ratings certified through the AMCA Certified Ratings Program, which was expanded in March 2011 to include Fan Efficiency Grades. AMCA Publication 211-05 – Product Rating Manual for Fan Air Performance describes how fans are certified to bear the AMCA seal for Fan Efficiency Grade (FEG).  

 AMCA 205 and ASHRAE 90.1  ASHRAE logo

AMCA International collaborated with the ASHRAE SSPC 90.1 Committee and its Mechanical Subcommittee,  and TC5.1 Fans to develop a fan efficiency requirement in the ANSI/ASHRAE/IES Standard 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildings.

The provision is written around ANSI/AMCA 205-12 Energy Efficiency Classification for Fans. It
specifies a fan efficiency grade (FEG) 67, and that the fan shall be sized and selected within 15 percentage points of its peak total efficiency. A number of exemptions are granted, including fans with motors <= 5 HP; fan arrays with an aggregate motor HP <= 5 HP; powered roof/wall ventilators; fans installed in equipment bearing certifications for air or energy performance; fans that operate only during emergencies; and fans that are not within the scope of AMCA 205.

A detailed technical article about the fan efficiency requirement in ASHRAE 90.1-2013, authored by John Cermak, PhD, and Michael Ivanovich, was published in the April 2013 issue of ASHRAE Journal.  A PDF of the article can be downloaded at no cost from the AMCA website by clicking on the bibliographic citation below.

Fan Efficiency Requirements for ASHRAE 90.1-2013, by John Cermak, PhD, ACME Engineering; and Michael Ivanovich, AMCA International, ASHRAE Journal, April 2013. 

Fan Efficiency Grades and the International Energy Conservation Code (IECC)

Following the approval of a fan efficiency requirement for ASHRAE 90.1-2013, ASHRAE and AMCA collaborated on code change proposals that seek to insert equivalent language the 2015 International Energy Conservation Code (IECC) with two important differences: fan efficiency grades for applicable fans would have to be "approved" and "labeled." These two measures would facilitate compliance checking and field inspections.

To help facilitate compliance checking with this requirement, AMCA has developed the FEG Finder utility to help engineers, code officials, and building owners to quickly find fan models that have AMCA-certified FEG ratings. Click here to go to the FEG Finder web page.

Two interconnected proposals were
unanimously approved at the IECC  (Group B) Committee Action Hearings in Dallas on April 27, 2013. The first, proposal CE234-13, adds most of the language associated with the fan efficiency provision. CE55-13 supplements CE234-13 with a definition for powered roof/wall ventilators, which are explicitly exempted from the provision.

STATUS: Nov. 7, 2013: The AMCA proposals did not receive any public comments, so they were moved to the Consent Agenda at the ICC Final Action Hearings for Group B code changes and approved. 

Fan Efficiency Grades and the International Green Construction Code (IgCC)

The 2012 International Green Construction Code is the first code or standard for energy efficiency or green construction to reference AMCA 205 Energy Efficiency Classification for Fans. AMCA International initiated the code change proposal and successfully defended it at the final action hearings in Phoenix in 2011. View the Code Change Proposal here (starting on page 17 of the PDF).

The 2012 IgCC is available for sale at the ICC online store.

The following is the language for fan efficiency in the 2012 IgCC:


607.2.2.3 Minimum fan efficiency. Stand-alone supply, return and exhaust fans designed for operating with motors over 750 watts (1hp) shall have an energy efficiency classification of not less than FEG71 as defined in AMCA 205. The total efficiency of the fan at the design point of operation shall be within 10 percentage points of either the maximum total efficiency of the fan or the static efficiency of the fan.

Add new definition as follows:



FAN EFFICIENCY GRADE (FEG). A numerical rating identifier that specifies the fan’s aerodynamic ability to convert shaft power, or impeller power in the case of a direct driven fan, to air power. FEGs are based on fan peak (optimum) energy efficiency that indicates the quality of the fan energy usage and the potential for minimizing the fan energy usage.

STATUS: July 15, 2013:  AMCA is developing a code change proposal for IgCC-2012 toward the 2016 version. Proposals are due January 6, 2014.  Click here for the schedule for the ICC "Group C" code cycle.

AMCA 205 and other codes and standards

International Association of Plumbing and Mechanical Officials (IAPMO)

STATUS: As of July 15, 2013: 
The 2014 Green Plumbing and Mechanical Code Supplement, published by IAPMO as an overlay to the Uniform Mechanical Code and the Uniform Plumbing Code, will contain a fan efficiency requirement that is based on the language and requirements in Addendum u to ASHRAE 90.1-2010.

ANSI/ASHRAE/USGBC/IES 189.1 Standard for the Design of High-Performance, Green Buildings Except Low-Rise Residential Buildings

AMCA International has submitted a continuous maintenance proposal (CMP to the SSPC 189.1 committee for a fan requirement that is identical to the Standard 90.1 requirement, except that instead of having a sizing/selection window of 15 percentage points, the window is a more-stringent 10 percentage points.

STATUS: As of Nov. 7, 2013: An AMCA Continuous Maintenance Proposal was submitted to Working Group 7 - Energy Efficiency; it is currently working its way through that subcommitee.

Air Curtains and IgCC

The 2012 International Green Construction Code adopted language referencing AMCA 220-05 Laboratory Methods of Testing Air Curtains for Aerodynamic Performance Ratings, allowing air curtains to be used in place of vestibules.

To aid engineers, architects, and code officials with applying air curtains in compliance with the IGCC, AMCA has made AMCA 220-05 and AMCA publication 222-08, Application Manual for Air Curtain Units, available on its Website at no cost to members and the public through the following links:

AMCA Standard 220-05, Laboratory Methods of Testing Air Curtains for Aerodynamic Performance Ratings

AMCA Publication 222-08, Application Manual for Air Curtain Units

Air Curtains and IECC

A code change proposal, CE192-13, toward the 2015 International Energy Conservation Coe (IECC) was submitted by AMCA, which was approved at the ICC  (Group B) Committee Action Hearings in Dallas on April 27, 2013 and approved at the Final Action Hearings in Atlantic City in October 2013. The proposal added a new exception to section C402.7 for vestibules (i.e., Exception 6). The entire section reads as follows:

C402.4.7 Vestibules. All building entrances shall be protected with an enclosed vestibule, with all doors opening into and out of the vestibule equipped with self-closing devices. Vestibules shall be designed so that in passing through the vestibule it is not necessary for the interior and exterior doors to open at the same time. The installation of one or more revolving doors in the building entrance shall not eliminate the requirement that a vestibule be provided on any doors adjacent to revolving doors.

Exceptions: Vestibules are not required for the following:
1. Buildings in Climate Zones 1 and 2.
2. Doors not intended to be used by the public, such as doors to mechanical or electrical equipment rooms, or intended solely for employee use.
3. Doors opening directly from a sleeping unit or dwelling unit.
4. Doors that open directly from a space less than 3,000 square feet (298 m2) in area.
5. Revolving doors.
6. Doors that have an air curtain with a minimum velocity of 2 m/s at the floor, have been tested in accordance with ANSI/AMCA 220 and installed in accordance with manufacturer's instructions. Manual or automatic controls shall be provided that will operate the air curtain with the opening and closing of the door. Air curtains and their controls shall comply with Section C408.2.3.

ANSI/AMCA 220-05 (rev. 2012) Laboratory Methods of Testing Air Curtains for Aerodynamic Performance Ratings is available on the AMCA Website for no charge (for a limited time only) at the AMCA bookstore.

U.S. Dept. of Energy Proposed Rulemaking  DOE logo


On June 28, 2011, the U.S. Dept. of Energy published a "proposed rulemaking" in the Federal Register signaling their intent to develop energy efficiency standards for commercial and industrial fans, blowers, and fume hoods. (Read the entire DOE proposal here) (For a printer-friendly PDF, click here).  

On July 29, 2011, AMCA submitted comments with a position that is generally supportive of the proposed rulemaking (i.e., DOE has the authority to do so), and suggested that DOE adopt existing standards where applicable for fan terminology and testing.

On December 20, 2011, AMCA representatives met with the U.S. Dept. of Energy Appliance Standards program to make introductions across the respective teams and to exchange information about fan-efficiency standards and regulation. As required for federal openness rules, AMCA submitted an "ex parte" memorandum to DOE to memorialize the meeting, which is now posted on the DOE website; click here to download a PDF of the memo.

On May 7, 2012, John Cymbalsky, who supervises the DOE Appliance and Equipment Standards Program, spoke at the AMCA Midyear Meeting, where he described the rule-making process in great detail. Click here for Mr. Cymbalsky's slides.

On January 28, 2013, DOE published the Framework Document for public comment and industry response to 109 questions seeking input and clarification. The Framework Document presents DOE's current understanding of the fan market, its thinking regarding scope of coverage, possible approaches to regulating energy efficiency, and a description of DOE's process for developing a regulation and analyzing costs and benefits. 

The deadline for written comments to the Framework Document has been extended to June 3, 2013.

Download a PDF of the Framework Document here.
Information on submitting comments and attending the public hearing are on the DOE website here.

On February 21, 2013, DOE held a public hearing at DOE Headquarters in Washington, DC. At the hearing, DOE presented a PowerPoint slide show that described the Framework Document and sought feedback to most of the 110 questions in the Framework Document.

AMCA sent a delegation consisting of Tim Kuski and Aaron Gotham, Greenheck Fan Inc.; Dan Hartlein, Twin City Fan; Mark Bublitz, New York Blower Co.; Robert Valbracht, Loren Cook Fan; Wade Smith, Mark Stevens, and Michael Ivanovich, AMCA International. Consultant Rob Boteler also participated on behalf of AMCA International. At the hearing, AMCA delegates responded orally to most of the questions presented by DOE and DOE's contractors, and used PowerPoint slides to support some of their answers and positions.

Download a PDF of the Public Hearing PowerPoint slides presented by DOE (3 MB)
To download a PDF of the transcripts from the public hearing, click here.
To download AMCA's PowerPoint slides, click here.

On May 29, 2013: AMCA submitted written comments to the DOE Framework Document. All comments were due June 2. Comments were submitted by a number of other oganizations as well, including Air-Conditioning, Heating and Refrigeration Institute (AHRI), Edison Electric Institute; Trane, ebm papst, Morrison Products, and non-governmental organizations such as American Council for an Energy Efficient Economy (ACEEE). To see all comments from all organizations, visit the DOE Docket for the Fans and Blowers rulemaking.

Status as of July 15, 2013
: DOE is processing the framework comments. The next public milestone is the release of the Preliminary Technical Support Document and the Notice of Proposed Rulemaking for a Fan Efficiency Test Standard. Those documents are expected some time in mid-2014.

Please send comments and suggestions regarding this page to Michael Ivanovich, Director of Strategic Energy Initiatives, AMCA International.