| Business | Phone |
| A-1 Air Conditioning & Heating Po Box 690002, Killeen 76549 | (254) 634-0555 |
| Artie's Heating & Air 125 N 4th St, Killeen 76541 | (254) 554-7250 |
| Aspen Air 617 E Veterans Memorial Blvd, Killeen 76548 | (254) 699-6120 |
| Atmosphere Sprinkler Po Box 4164, Killeen 76540 | (254) 690-2866 |
| Barker Mechanical Po Box 10924, Killeen 76547 | (254) 526-8538 |
| Bell Air Conditioning 310 E Central Ave, Killeen 76541 | (254) 526-6874 |
| Brewer Enterprises Killeen 76541 | (254) 634-6077 |
| C W Creative Air 1204 Karen Dr, Killeen 76549 | (254) 628-7002 |
| Cabrera Heating & Air Cond Killeen 76541 | (254) 519-7924 |
| Chapman's Full Svc Maintenance 2034 E Stagecoach Rd, Killeen 76542 | (254) 554-6436 |
| Classic Climate Control 1300 Dogwood Blvd, Killeen 76543 | (254) 680-8765 |
| Classic Climate Control 1500 Carrolton Ave, Killeen 76541 | (254) 680-8765 |
| Rod's Air Conditioning & Htg 4401 Old Copperas Cove Rd A, Killeen 76549 | (254) 634-4332 |
| O'Neal Heating & Air Ocnd 312 N 8th St, Killeen 76541 | (254) 628-1216 |
| Quality Heating & Air Cond 1112 Florence Rd, Killeen 76541 | (254) 526-0313 |
| Rabroker Air Conditioning 417 N 2nd St, Killeen 76541 | (254) 526-6017 |
| Csk Air Conditioning & Htg 2600 Lu Cir, Killeen 76543 | (254) 526-0526 |
| Ellis Air Systems 3513 Florence Rd, Killeen 76542 | (254) 526-5410 |
| Gary's Air Conditioning Killeen 76541 | (254) 526-8822 |
| Goodman 2719 E Elms Rd, Killeen 76542 | (254) 690-4072 |
| K G Heating & Air Conditioning 2406 Hidden Hill Dr, Killeen 76543 | (254) 690-3788 |
| Killeen Heating & Air Cond 509 Conder St, Killeen 76541 | (254) 953-3344 |
| Kilpatrick Heating & Air Cond 6133 Chaparral Rd, Killeen 76542 | (254) 634-4844 |
| Hallmark Service Co 1106 W Stan Schlueter Loop, Killeen 76549 | (254) 634-5317 |