In my part of the country we have tornado alarms that are tested on the first Saturday of the month at 10:00 AM. This is intended to verify the system is working. The house smoke alarm companies should build a self testing alarm the same way. Program it to sound a test alarm once a month at a designated time to indicate two things - 1) the system is still functioning and 2) the system still has adequate power (either electrical or battery). If the alarm doesn't sound on that particular day and time, you know that you have a malfunction. I know they have test buttons but does anyone use them?

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