| Business | Phone |
| Advanced Control Systems Inc 1465 Northwest Blvd, Columbus 43212 | (614) 481-8230 |
| Sequent Power Inc 2162 Mckinley Ave, Columbus 43204 | (614) 276-6001 |
| Columbus Controls Inc 3573 Johnny Appleseed Ct, Columbus 43231 | (614) 882-9029 |
| Rex Automation Inc 959 Schrock Rd, Columbus 43229 | (614) 436-5515 |
| Columbus Temperature Control 1053 E 5th Ave, Columbus 43201 | (614) 294-6216 |
| Commercial Control Svc Inc 1356 Norton Ave, Columbus 43212 | (614) 424-9804 |
| Ohio Heating & Refrigeration 1465 Clara Ave, Columbus 43211 | (614) 863-6666 |
| Great Lakes Controls Corp 3001 Bethel Rd, Columbus 43220 | (614) 451-7872 |
| Johnson Controls Inc 4741 Hilton Corporate Dr, Columbus 43232 | (614) 751-4200 |