| Business | Phone |
| Climate Systems Inc 3005 W Russell St, Sioux Falls 57107 | (605) 334-2164 |
| Siemens Building Technologies 2201 E 54th St N, Sioux Falls 57104 | (605) 332-3805 |
| G & R Controls 2201 E 54th St N, Sioux Falls 57104 | (605) 336-3788 |
| Honeywell 1500 W 51st St # 101, Sioux Falls 57105 | (605) 373-3720 |
| Mlh Electric 47066 104th St, Sioux Falls 57108 | (605) 368-2822 |
| Interstates Control Systems 5200 S Cliff Ave, Sioux Falls 57108 | (605) 988-0833 |
| Johnson Controls Inc 3413 S Gateway Blvd, Sioux Falls 57106 | (605) 361-0680 |