| Business | Phone |
| Eco Air Systems 4861 Hillside Dr, Carlsbad 92008 | (760) 720-5454 |
| E & L Pure Air Co 4892 Alondra Way, Carlsbad 92008 | (760) 730-9469 |
| Micron Solutions Intl 5245 Avenida Encinas # H, Carlsbad 92008 | (760) 602-0160 |
| Grove Group 2344 Hosp Way # 327, Carlsbad 92008 | (760) 730-9677 |