At what height should at least one manual activation control be located?

• A. Not more than 2 ft (0.6 m) above the floor.
• B. Not more than 6 ft (1.8 m) above the floor.
• C. Not more than 4 ft (1.2 m) above the floor.
• D. Not more than 8 ft above the floor.

Answer: (C)

The key idea is accessibility and quick manual release. Manual activation controls must be reachable by occupants without tools or ladders, even if there’s smoke or clutter. Mounting at not more than 4 feet (about 1.2 meters) above the floor ensures a typical adult can reach and operate it quickly, and it also aligns with accessibility expectations for reach ranges. If the device were higher, it could be delayed or become unusable in an emergency. Heights like 6 feet or 8 feet are too high for prompt activation, while placing it very low (around 2 feet) risks accidental activation or obstruction. Therefore, not more than 4 feet above the floor is the practical, safety-focused height.