Where must a damper installed in a corridor wall be controlled from?

The correct answer is that a damper installed in a corridor wall must be controlled from the corridor. This ensures that the damper can be operated effectively and safely in the event of a fire or smoke condition, which is often its primary purpose in a building's ventilation and smoke control system.

Controlling the damper from the corridor allows for quick accessibility for personnel responsible for managing the building's safety systems. Additionally, it aligns with fire safety protocols that require easy interaction with fire protection equipment in areas where people regularly move, such as corridors, maintaining compliance with building codes and fire safety regulations.

In contrast, controlling the damper from locations such as the kitchen, roof, or basement may not provide the same level of immediate access or effectiveness in case of an emergency, potentially delaying response times to critical situations where smoke or fire management is necessary. The location of control is essential for both safety and operational efficiency within the building.