In areas where the temperature is between 40 degrees Farenheit and 100 degrees Farenheit. Where the manufacturer recommends its placement. Read the instructions to be sure that you are placing the unit in the absolute best location. In dusty, dirty, or greasy areas. Near air vents, ceiling fans, or other drafty areas.
Drafts can blow the smoke away from the smoke detector, preventing the smoke detector from sounding.
Both electric smoke detectors and battery-powered smoke detectors have benefits and drawbacks. Battery powered smoke detectors must have regular maintenance, including frequent testing and battery replacement. However, they are easy to install and relatively inexpensive. Some smoke detectors are built to sound a warning alarm when the battery power begins to run low. By chirping, the smoke detector is trying to get your attention and convince you to put a new battery inside it.