| Business | Phone |
| Darian Control Systems 24825 Huntwood Ave, Hayward 94544 | (510) 785-9575 |
| Energy Etc Inc Hayward 94541 | (510) 581-4899 |
| Jwb Electric Hayward 94541 | (510) 881-0431 |
| Belilove Co 21060 Corsair Blvd, Hayward 94545 | (510) 895-6186 |
| Siemens Building Technologies 25821 Industrial Blvd # 300, Hayward 94545 | (510) 783-6000 |
| Stc Controls 24418 Calaveras Rd, Hayward 94545 | (510) 782-2474 |