Identify ONE key placement guideline for the location of smoke detectors.

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Multiple Choice

Identify ONE key placement guideline for the location of smoke detectors.

Smoke rises and spreads along the ceiling, so detectors need to sit where rising smoke can reach them quickly. Corners and the space where two walls meet create a stagnant, dead-air pocket that slows or even prevents smoke from reaching a detector promptly. The 4-inch zone on either side of a corner is exactly that dead-air area, making any detector placed there one of the least effective locations for rapid detection. To maximize detection speed, ceiling-mounted detectors should be positioned away from walls—typically at least 4 inches from any wall—so they sample fresh air as it rises. If you only have one detector on a ceiling, it should be placed near the center of the room rather than as far from the center as possible. For wall-mounted detectors, the usual guideline is placement 4 to 12 inches below the ceiling, not within a small gap of 1 to 3 inches.

Smoke rises and spreads along the ceiling, so detectors need to sit where rising smoke can reach them quickly. Corners and the space where two walls meet create a stagnant, dead-air pocket that slows or even prevents smoke from reaching a detector promptly. The 4-inch zone on either side of a corner is exactly that dead-air area, making any detector placed there one of the least effective locations for rapid detection.

To maximize detection speed, ceiling-mounted detectors should be positioned away from walls—typically at least 4 inches from any wall—so they sample fresh air as it rises. If you only have one detector on a ceiling, it should be placed near the center of the room rather than as far from the center as possible. For wall-mounted detectors, the usual guideline is placement 4 to 12 inches below the ceiling, not within a small gap of 1 to 3 inches.

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