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Perhaps the most important thing we learned from our testing is that smoke detectors have a limited range, which is one of the reasons modern building codes require a unit in every bedroom as well as in areas adjacent to bedrooms. To test effectiveness, we sprayed test smoke from an aerosol can directly at each device and timed how long it took the alarm to sound. We sprayed the test smoke from 5, 10 and 15 feet away. Every detector sounded within 30 seconds at the 5 foot mark. Three smart smoke alarms –Nest Protect, Halo+ and First Alert Onelink – went off at the 10 foot mark. All but one of the smoke detectors, the Nest Protect, failed to detect dangerous levels of smoke at the 15 foot mark.home monitor systems
3. com I'm Donna J. Jodhan wishing you a terrific day and week. To reach me, please send an email to and I would be delighted to send you an electronic copy of our latest newsletter. You can view more of my blogs and editorials at the following websites:Donna Jodhan!There are lots of fantastic deals on security cameras to keep your home safe. If you've been thinking about adding a layer of smart security to your home, this is the perfect time to do it.