Eventually all this madness will die off. We have been through this before. Condo and high rise owners cannot or will not afford the costs. Too prohibitive. Should look for a chemical fire suppressant you can screw high up on the wall above kitchens, hot plates, car garages, and will explode in fires sending out anti-fire gases or liquids. Someone must have invented one somewhere. Maybe a fire extinguisher canister with a sprinkler head. Put in several if too small. Bet you the sprinkler companies don't want you to know this. As for siren smoke or fire detectors with batteries, faggeddaboudem. Tired of chirping reminders to change low batteries. It has been proven that they will NOT wake up the dead. Need to custom make flashing dome lights installed upside down on the ceiling and electrically wired to you home alarm system. I have this and had Alert Alarm hook it up. Works beautifully. Great for deaf elderly. If you got the money and are young call a plumber and install water sprinkle