Best Smoke Detectors and Dual Alarms for 2026: Lab Tested
Our smoke detection test chamber allows us to test how quickly each model sounds an alarm when smoke enters the environment.
When it comes to smoke detection, time is of the essence. That’s why we designed a test that simulates a real emergency.
The first thing to know is that there are two main types of fires that these products are designed for: smoldering fires and flaming fires.
A smoldering (or slow-burning) fire refers to combustion that occurs on the surface of a solid material. Smoldering fires produce large amounts of thick smoke but cannot sustain a flame. Think of a cigarette that burns slowly but never ignites.
A smoldering fire can and will become a blazing fire if appropriate action is not taken immediately.
Fires with flames are the ones we are most familiar with and they usually result from the ignition of any flammable material, such as a flammable substance, wood, paper, etc. They generally produce less smoke than a smoldering fire but are more destructive.
In my garden I built a chamber that houses the smoke detector and introduced the two different types of smoke into it through a chimney. I timed the speed of the response. The sooner the smoke detectors alarm, the better.
Smoke detection tests in progress.
To simulate smoke from a smoldering fire, I lit 300g of charcoal and let it heat for 10 minutes before adding smoke. I wanted to make sure most of the coals were lit and the smoke was thick enough to set off the alarm.
Recreating a blazing fire was easy, just 30g of shredded paper was enough. Again, I made sure a significant amount of smoke was present before passing it through the chimney and into the chamber.
Much to the chagrin of my neighbors, who had to put up with random smoke alarms going off, and to whom I sincerely apologize, I repeated the entire process three times per smoke detector model tested and per smoke type, for a total of six tests per smoke detector. Finally, I averaged the response times.
