| Business | Phone |
| A & T Heating & Cooling Fairfax 22033 | (703) 803-8822 |
| Amer Mec Svc 10413 North St, Fairfax 22030 | (703) 385-6819 |
| B & Bac & Heating 8400 Hilltop Rd F, Fairfax 22031 | (703) 860-2477 |
| Avs Air Conditioning & Htg 2711 Dorr Ave G, Fairfax 22031 | (301) 306-0400 |
| Brennan's Heating & Air Cond Fairfax 22030 | (703) 323-0100 |
| Central Services Heating & Air 11325 Lee Hwy, Fairfax 22030 | (703) 951-5400 |
| D A Simpson Corp 3975 University Dr, Fairfax 22030 | (703) 359-6480 |
| Dominion Mechanical Contr Inc 12329 Braddock Rd, Fairfax 22030 | (703) 992-3589 |
| Fjg Air Cond & Heating 3905 Railroad Ave, Fairfax 22030 | (703) 435-6981 |
| Home Owners Plbg Htg & Elec 8451 Hilltop Rd M, Fairfax 22031 | (703) 273-8900 |
| Homeowners Plumbing 8451 Hilltop Rd M, Fairfax 22031 | (703) 698-0086 |
| John C Flood Inc Fairfax 22031 | (703) 591-6080 |
| My Plumber Fairfax 22030 | (703) 273-6870 |
| Jaensch Plumbing Fairfax 22032 | (703) 323-0310 |
| A A Total Mechanical Fairfax 22032 | (703) 323-3979 |
| A B & A Heating Air Cond 10720 Main St, Fairfax 22030 | (703) 385-0063 |
| All State Plumbing Fairfax 22030 | (703) 691-3080 |
| M & R & Sons Inc Fairfax 22030 | (703) 273-3400 |