| Select | | 360° Test Labs | Test Lab | 4 Executive Plaza | Yonkers | New York | USA |
| Select | | 3M Company | Test Lab | 3M Center | Maplewood | Minnesota | USA |
| Select | | 3M Company (Filtrete) | Test Lab | 3M Center | Maplewood | Minnesota | USA |
| Select | | AAF Flanders KY | Test Lab | 9920 Corporate Campus Drive, Suite 2200 | Louisville | Kentucky | USA |
| Select | | ABB Motors and Mechanical Inc. | Test Lab | 5711 R.S. Boreham Jr. St. | Fort Smith | Arkansas | USA |
| Select | | Acme Engineering & Manufacturing Corporation | Test Lab | 1820 N York St | Muskogee | Oklahoma | USA |
| Select | | Acuity Brands Lighting | Test Lab | 1 Acuity Way | Decatur | Georgia | USA |
| Select | | adamant technical services inc | Test Lab | 26851 miles rd | cleveland | Ohio | USA |
| Select | | Aerospace Testing Technology (Shenzhen) Co., Ltd. | Test Lab | 3/F, Block A1, No.5, 8th Road, Shapu Yangyong Indu | Shenzhen | Guang Dong | China |
| Select | | Air Cool Industrial Co., Ltd. | Test Lab | Chen Jiang Administrative District, Bai Yun Shan, Luo-Qun Village | Chen Jiang, HuiZhou | Guangdong | China |
| Select | | Air Movement and Control Association, International (AMCA) | Test Lab | 30 West University Drive | Arlington Heights | Illinois | USA |
| Select | | AirPro Fan & Blower Company | Test Lab | 425 W Davenport St | RHINELANDER | Wisconsin | USA |
| Select | | AirScape, Inc. | Test Lab | 625 Charles Way | Medford | Oregon | USA |
| Select | | Alarco, Inc | Test Lab | 13000 San Fernando Rd Ste 8 | Sylmar | California | USA |
| Select | | Alfred Kärcher SE & Co. KG | Test Lab | Alfred-Kärcher-Strasse 28-40 | Winnenden | Baden-Württemberg | Germany |
| Select | | Alliance Laundry Systems LLC | Test Lab | Shepard Street P.O. Box 990 | Ripon | Wisconsin | USA |
| Select | | Alto-Shaam Inc | Test Lab | W164 N9221 Water St | Menomonee Falls | Wisconsin | USA |
| Select | | American Coolair Corp | Test Lab | 3604 Mayflower Street | Jacksonville | Florida | USA |
| Select | | American Power Conversion Corp. | Test Lab | 132 Fairgrounds Road | West Kingston | Rhode Island | USA |
| Select | | Ametek Prestolite Power | Test Lab | 875 Dearborn Drive | Columbus | Ohio | USA |
| Select | | AMTRAN VIETNAM TECHNOLOGY COMPANY LIMITED | Test Lab | No.115,East-West Road,VSIP Hai Phong Township, | Hai Phong City | Hai Phong | Vietnam |
| Select | | Anhui Lanjie Intelligent Home Appliance Co.,LTD | Test Lab | No.26,Laifu Road,Xinqiao International Industrial | Huainan | Anhui | China |
| Select | | AnTek Certification, Inc. | Test Lab | 7F., No 351, Yangguang St. | Neihu District | Taipei | Taiwan |
| Select | | Apple, Inc. | Test Lab | One Apple Park Way | Cupertino | California | USA |
| Select | | AQM SRL | Test Lab | Via T.edison 18 | Provaglio D Iseo | Italy - BS | Italy |
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