Air Tech Test & Balance LLC, Moweaqua, Illinois
- Building Control Systems LLC, Lehi, Utah
- Matrix Air & Hydronic Balancing Co., Whittier, California
- Mechanical Solutions LLC, Polk City, Iowa
- Seacliff Mechanical Services, Los Alamitos, California
- Triangle Enterprises Inc., Paducah, Kentucky
- Turner Mechanical Services, Ridgefield, Connecticut
- Wm T. Spaeder Co., Erie, Pennsylvania