| Business | Phone |
| Willis Mechanical Svc 423 Dante School Rd, Knoxville 37918 | (865) 688-9962 |
| Ultraweld Co 1773 Amherst Rd, Knoxville 37909 | (865) 909-0123 |
| Temperature Control Inc 4335 Anderson Rd, Knoxville 37918 | (865) 687-1131 |
| Campbell Plumbing 2105 Windbrook Rd, Knoxville 37923 | (865) 679-7208 |
| State Mechanical 5108 E Emory Rd, Knoxville 37938 | (865) 925-2979 |
| Del-Air Mechanical Contrs Inc 135 Chickamauga Ave, Knoxville 37917 | (865) 525-4119 |
| Engert Plumbing & Heating Inc 1715 Riverside Dr, Knoxville 37915 | (865) 524-2535 |
| Flatt Plumbing & Heating 5507 Ball Camp Pike, Knoxville 37921 | (865) 588-9611 |
| Mc Mahan Mechanical 6549 Creekhead Dr, Knoxville 37909 | (865) 691-3857 |
| Mechanical Data 10427 Cogdill Rd, Knoxville 37932 | (865) 777-9634 |
| Metro Hvac 7802 Norris Fwy, Knoxville 37938 | (865) 922-5912 |
| Hicks & Ingle Corp 8909 Joe Daniels Rd, Knoxville 37931 | (865) 927-4529 |
| Jack's Mechanical Svc 3400 Garden Dr, Knoxville 37918 | (865) 689-0292 |