| Business | Phone |
| Acorn Industrial Inc 7311 Acc Blvd, Raleigh 27617 | (919) 957-2500 |
| Britt's Mechanical Inc 4221 High Mountain Dr, Raleigh 27603 | (919) 829-9001 |
| Collier Mechanical Fuquay, Raleigh 27606 | (919) 851-6644 |
| Triangle Mechanical 317 W Jones St, Raleigh 27603 | (919) 833-3644 |
| Triangle Test Balance/Analysis 3313 Eagle Trl, Raleigh 27615 | (919) 848-3249 |
| Powell Mechanical Contracting 1220 Kirkland Rd, Raleigh 27603 | (919) 833-0960 |
| John J Kirlin Inc 8200 Brownleigh Dr, Raleigh 27617 | (919) 787-4862 |
| Morrissey Mechanical 8809 Gulf Ct # A, Raleigh 27617 | (919) 788-0881 |
| Mcc Mechanical 302 Jefferson St # 180, Raleigh 27605 | (919) 881-1188 |