| Business | Phone |
| Airmax Ac Heat & Refrig 8898 County Road 2584, Royse City 75189 | (972) 226-3746 |
| Airmax Heating & Ac Royse City 75189 | (972) 636-3043 |
| D-N-D Svc Royse City 75189 | (972) 636-2455 |
| Express Service A/C 270 Southern Dr, Royse City 75189 | (972) 771-7807 |
| Express Service Contractors 270 Southern Dr B, Royse City 75189 | (972) 412-1117 |
| Heritage Air By Summer Svc 360 Northstar Rd, Royse City 75189 | (972) 412-3704 |
| Preferred Mechanical Inc 7496 W State Highway 66, Royse City 75189 | (972) 636-3662 |
| Royse City Htg & Air Cndtng 6286 County Road 2520, Royse City 75189 | (972) 636-3754 |