Here is what I think is a sane timeline: (1) smoke detector in kitchen goes off, only sets off in kitchen (2) after 1 minute, other rooms start saying "smoke

Here is what I think is a sane timeline: (1) smoke detector in kitchen goes off, only sets off in kitchen (2) after 1 minute, other rooms start saying "smoke in kitchen" (3) after 2 minutes, alarm goes off in other rooms Timeline could be shortened if necessary for safety, but this doesn't seem like it would be difficult to implement.