alarm systems

are hardwired smoke detectors considered an alarm system

Only if a fire is trying to rob the place…

http://www.cityoflagrande.org/muraProjects/muraLAG/lagcity/index.cfm/faq/what-is-the-difference-between-smoke-alarms-and-smoke-detectors/

http://www.fireengineering.com/articles/2008/10/smoke-alarm-or-smoke-detector.html

http://www.townofws.ca/en/residents/resources/Documents/Smoke_Alarm_v_Detector.pdf

Yes, they are a type of alarm system. A smoke/fire alarm system. In some cases the detectors are integrated into a total home burglar/fire alarm system.

Why do you ask?

Cheers