| Business | Phone |
| C C Pace Resources Inc 4401 Fair Lakes Ct, Fairfax 22033 | (703) 818-9100 |
| Energy Management Center 3053 Nutley St, Fairfax 22031 | (703) 560-6460 |
| Noresco 2750 Prosperity Ave 130, Fairfax 22031 | (703) 846-9700 |
| Optimumhouse Corp 12410 Ramrod Ct, Fairfax 22030 | (703) 745-9053 |
| Solar Energy Design Inc 3822 Prince William Dr, Fairfax 22031 | (703) 978-0873 |