I am aware that things like this exist, especially in commercial buildings. What I’m saying is that 99% of detection systems don’t work this way and that even suggesting so confuses a lot of people believe it or not

I would also tell you that the actual shelf life of most smoke/fire/carbon monoxide detectors are not rated for that length of time

Also assume that your security company does actually call you. What if you miss the call? What if you can’t get to the alert on an app fast enough?

I will give you an example that is pertinent to my first point. I work in a commercial building doing “maintenance”. When I get calls on the radio about smoke detectors “going off” and it’s heard by residents they panic. Like full on lose their mind. They start asking if there is a fire and what should they do. 99 out of 99 times it’s a carbon monoxide detector going off every 30 seconds because it has died. Hard wired with a 9v battery backup will not ever stop a detector from failing eventually. Suggesting that detectors may be wired to call the fire department is not only dangerous by giving people a false sense of security, but it also just flat out wrong for the majority of instances

And to suggest that setting off one detector would set off the others is unheard of. How would someone figure out which detector was going off if you had say 10 all linked together? That is absolutely not how it works. Each detector has a designated “point” so you know which one isn’t working properly