| Business | Phone |
| Fire Detection Systems 1351 W 121st Ave, Denver 80234 | (303) 438-8088 |
| Metro Fire Detection 1152 Lipan Dr, Denver 80221 | (303) 457-8088 |
| B & J Life Safety Co 2035 S Julian Cir, Denver 80219 | (303) 937-7525 |
| Bronco Fire Alarm Systems 3704 Osage St, Denver 80211 | (303) 477-1430 |
| Complete Fire Protection Inc 2111 S Jason St # A, Denver 80223 | (303) 922-1055 |
| Dailey Services 4255 W 49th Ave, Denver 80212 | (303) 455-0889 |
| Eagle Development Co 3900 E Mexico Ave, Denver 80210 | (303) 715-1411 |
| Fire-Lite Alarms Inc-Notifier 536 Kalamath St, Denver 80204 | (303) 572-0962 |
| Simplex Grinnell 6240 Smith Rd, Denver 80216 | (303) 355-0500 |
| Lucien Security Denver 80222 | (303) 380-7878 |
| Neuland Fire Alarms 815 E 17th Ave, Denver 80218 | (303) 715-5090 |