Which statement is true regarding mounting smoke detectors?

Mounting smoke detectors effectively is critical for ensuring the safety of a home or building. The statement that they should be mounted high on walls is true because smoke rises and accumulates near the ceiling before it descends. By placing smoke detectors higher up, you increase their ability to detect smoke quickly, as they will sense smoke before it has a chance to fill the room.

While it is also true that smoke detectors are most effective when placed on ceilings, the statement about mounting high on walls still acknowledges the principle that smoke rises. Eye-level placement is generally discouraged because it may not detect smoke as effectively, especially in larger spaces where smoke can accumulate above eye level. Furthermore, placing smoke detectors above windows is not advisable, as this could create a situation where they are less responsive to smoke, which tends to move along the ceiling and walls toward the room center.

Overall, the proper mounting height maximizes the detector's efficiency in alerting occupants to the presence of smoke.