| MEMonroe Environmental CORP | Monroe | MI | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MPMorrison Products Dallas | Mesquite | TX | Machinery Manufacturing333412 | 100-499 | ◐ LIKELY ACTIVE |
| NFNorthland Filter International LLC | Oswego | NY | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| PCPollution Control INC. | Hampton | AR | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| PSPollution System Solutions INC | Oak Ridge North | TX | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| RFRobinson Fans Florida | Lakeland | FL | Machinery Manufacturing333412 | 20-99 | ◐ LIKELY ACTIVE |
| SCScfm Corporation | Anaheim | CA | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| SMSolberg Manufacturing INC. | Itasca | IL | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
The New York Blower Company | Leitchfield | KY | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| TATrion - ASC | Sanford | NC | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| TCTwin City Fan Companies LTD. | Brookings | SD | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| TCTwin City Fan Companies: Plymouth | Minneapolis | MN | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| WWWm W Nugent & CO INC | Skokie | IL | Fabricated Metal Product Manufacturing332420 | — | ◐ LIKELY ACTIVE |
| ALAaf Louisville Cartridge Plant | Louisville | KY | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| CFCincinnati Fan and Ventilator Company | Mason | OH | Machinery Manufacturing333412 | — | ◐ LIKELY ACTIVE |
| CSCoalogix Scr-tech | Charlotte | NC | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
Greenheck Fan CORP | Schofield | WI | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
Greenheck Fan CORP | Tulsa | OK | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
Greenheck Fan CORP | Schofield | WI | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
Greenheck Fan CORP. Kentucky | Frankfort | KY | Machinery Manufacturing333412 | — | ◐ LIKELY ACTIVE |
Greenheck Fan Corporation - Facility 18 | Schofield | WI | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
Hartzell Fan INC - S. Main Piqua | Piqua | OH | Machinery Manufacturing333412 | — | ◐ LIKELY ACTIVE |
| IUIfil USA | Harrisonville | MO | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| MAMercer Area Jr Sr High Sch | Mercer | PA | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| NFNational Filter Media | Salt Lake City | UT | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| TCTwin City Clarage, INC. | Birmingham | AL | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| ZIZiehl-abegg, INC | Winston Salem | NC | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| AFAAF Flanders Atlanta | Duluth | GA | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| AFAAF Flanders Bartow | Bartow | FL | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| AFAAF Flanders Columbia | Columbia | MO | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| AFAAF Flanders Smithfield | Smithfield | NC | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| ARAborlan Rock LLC | Overton | NV | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| AIAbsolent, INC. | Raleigh | NC | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| AIAirbox, INC. | Statesville | NC | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| AIAireSafe International | Janesville | WI | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| AFAir Filtration Co Inc. | Lancaster | CA | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| AMAir Management Solutions, INC. | Powder Springs | GA | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| AFAirPro Fan & Blower co. -EAST | Rhinelander | WI | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| AFAirPro Fan & Blower co. -NORTH | Rhinelander | WI | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| AFAirPro Fan & Blower co. -WEST | Rhinelander | WI | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| AFAirPro Fan & Blower co. -WY | Cody | WY | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| ATAir Technology Solutions LLC | Princeton | WI | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| BABeth-el America LLC | Sunrise | FL | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| BABig Ass Fans-Lexington | Lexington | KY | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| BABig Ass Fans - Texas | Fort Worth | TX | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| BVBrandon, VT | Brandon | VT | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| BFBurlington Facility | Burlington | WA | Machinery Manufacturing333413 | 100-499 | ◐ LIKELY ACTIVE |
| CMCa66 Mil Aero | El Cajon | CA | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| CMCamcorp Mfg | Willow Springs | MO | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| CCamfil-Austin (746) | Austin | TX | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |