Why is it recommended to have smoke detectors in every hallway and room of a large building?

Having smoke detectors in every hallway and room of a large building is crucial for ensuring comprehensive coverage. This level of coverage is necessary because it significantly increases the likelihood of detecting smoke early, regardless of where a fire might start. Smoke can spread quickly, and different areas of a building may have varying levels of risk based on occupancy, activity, and materials present.

By placing detectors in all key areas, including hallways and rooms, you enhance occupant safety and promote a rapid response in case of a fire. Comprehensive placement helps ensure that any smoke generated is detected promptly, which can be vital in alerting individuals to evacuate the premises and allow for alerting emergency services in a timely manner.

In contrast, reducing installation costs, complying with insurance requirements, or making testing easier might not be the primary reasons for extensive coverage. While these factors may play a role in decision-making, the essential goal is to protect lives and property by minimizing response time during a fire incident, which is best achieved through thorough placement of smoke detectors.