The damper must be operable from _____.

The correct answer is that the damper must be operable from inside the room containing the fireplace. This requirement is crucial for ensuring safety and convenience.

When a damper is operable from the room, it allows the homeowner or user easy access to control the airflow. This is important for managing the combustion process and preventing smoke from entering the living space when the fireplace is not in use. Users can conveniently open or close the damper as needed without having to access difficult or hazardous locations, such as the exterior or inside the chimney.

Additionally, having the damper operable from inside helps ensure that proper ventilation is maintained while minimizing the risk of carbon monoxide buildup in the home. It ensures that the user can operate the damper quickly in case of an emergency, enhancing the overall safety of the fireplace and its flue system.

This requirement aligns with building codes and safety standards, emphasizing the importance of accessibility and user control over fireplace operations.