Regular smoke alarms will only do one thing
Defending against fire is a crucial consideration, and smoke detectors perform an essential part in keeping your family safe. However, smoke detectors have some drawbacks. To illustrate, they can only identify smoke, not heat. In the event there is a blaze starting in your home, you would not be warned unless the smoke rises to the smoke detector. While there are some other unmistakable signs of fire -- including a marked increase in warmth -- if there’s a lack of smoke, you won’t have a triggered smoke detector.
In addition, smoke detectors only sound the alarm when they detect an adequate amount of smoke. If a fire starts small, you may not be warned until the situation is out of hand. Various smoke detectors employ more than one sensor, meaning they will recognize smoke from both roaring flames and a more gradual burn. Then when they do go off, it falls to the resident to call emergency services after safely leaving the residence.