| Business | Phone |
| Ace & A Heating & Air Cond 1728 Old Norcross Rd, Lawrenceville 30044 | (770) 963-5553 |
| Amcool Inc 485 Buford Dr, Lawrenceville 30045 | (770) 995-6773 |
| Frix Service Co 3412 Cruse Rd, Lawrenceville 30044 | (770) 921-5692 |
| Triad Mechanical Co Inc 393 Swanson Dr, Lawrenceville 30043 | (770) 822-5502 |
| Radiant Heat Systems Llc Lawrenceville 30045 | (770) 338-0585 |
| Patterson Heating & Air 2992 Cruse Rd, Lawrenceville 30044 | (770) 564-0739 |
| Kinney's Heating & Air Cond 1724 Alcovy Rd, Lawrenceville 30045 | (770) 962-2487 |