What must be done to ensure modern smoke detectors operate correctly?

To ensure modern smoke detectors operate correctly, regularly testing them for operation is essential. Testing verifies that the smoke detector is functioning as intended and can respond properly to smoke or heat. Most smoke detectors have a test button that, when pressed, simulates a smoke condition and prompts the alarm to sound. This function helps identify any malfunctions, such as a dead battery or a unit that has failed, which may not be apparent otherwise.

While installing smoke detectors in every room can enhance safety, it's not a guarantee of their operation. Replacing batteries annually is a good practice, but it may not be sufficient if the unit is not tested regularly. Regular testing is critical to ensure that the alarm will sound when needed, thus making it the most direct measure for maintaining the effectiveness of smoke detectors in providing safety from fire.