What is the minimum height for wall-mounted audible notification appliances above the finished floor?

Wall-mounted audible notification appliances must be installed at a minimum height to ensure that they are effective in alerting individuals in the area, particularly in environments with potential obstructions or varied layouts. The chosen minimum height of 90 inches above the finished floor is based on safety standards aimed at ensuring that the sound emitted from these devices can reach people effectively, including those who are standing or sitting in various situations. This height helps to minimize the risk of obstruction from furniture or other features within the space, ensuring that the alarm signals can be perceived by everyone present.

Standards for installation heights are designed to provide maximum accessibility and effectiveness for emergency warning systems, which is critical in maintaining safety in facilities, especially those open to public access. The specific threshold ensures compliance with relevant codes and regulations regarding fire alarm systems.