If you are asleep and your house catches fire, the idea is that the smoke detector will wake you up with enough time hopefully to escape the fire. That is really their primary purpose.
Some European countries do require them. Germany and Britain require smoke detectors in all residential buildings, for example.
lonefighter@sh.itjust.works 3 days ago
I work in EMS. When we respond to house fires in the middle of the night there’s kind of two different ways they go. When people have smoke detectors and their house catches on fire in the middle of the night they’re the ones who call us and we get on scene to find them outside their home in their pajamas, watching their house burn, very shaken up but ok. They never need anything from us ambulance-wise except maybe some blankets. When people don’t have smoke detectors in their homes and they catch on fire in the middle of the night a neighbor or passer-by calls the fire in and we get on scene and the firefighters are dragging bodies out to us.
nocturne@slrpnk.net 3 days ago
As I mentioned in another comment, I almost died in a house fire. I had an aerosol can in a pile of clothes that caught fire from a heater, that can exploded and woke me. Otherwise I would have slept through the fire.
Your comment hits me really hard (I am sure not as hard as being on scene where they did not have detectors). But reading some of the dismissive comments I was starting to think I was over reacting, you assured me I was not.