| Business | Phone |
| Custom Mechanical Systems 1985 Grassland Pkwy, Alpharetta 30004 | (770) 772-9880 |
| D D & C Hvac 307 Fernbank Ct, Alpharetta 30004 | (770) 442-3090 |
| Fulton Mechanical Svc 1062 Union Center Dr 12, Alpharetta 30004 | (770) 772-0068 |
| Sterling Mechanical Svc 435 Briars Bnd, Alpharetta 30004 | (770) 619-5150 |
| J S Thomas Co 9365 Industrial Trce, Alpharetta 30004 | (770) 475-2600 |