Your smoke alarm’s chirp can be oddly reassuring, a small sound that suggests everything is still working. Yet the device ...
When you move into or buy a new home, no one hands you a guide to how the smoke detectors work. They "chirp," which really means shriek loudly, and you occasionally have to put new batteries in them.
Your smoke and carbon monoxide detectors quietly decide how much time you have to escape a fire, yet the tiny date code that tells you whether they still work is easy to miss. That code is usually ...