What is the minimum distance from a wall for a detector mounted on the ceiling?

The correct distance from a wall for a detector mounted on the ceiling is 4 inches. This guideline is important for ensuring that detectors function properly and can adequately detect smoke or heat without interference from wall structures. Mounting a detector too close to the wall might obstruct airflow, impacting the detector's ability to sense alterations in the environment effectively.

When smoke or heat is detected, it needs to travel unobstructed to reach the sensor unit. Therefore, following the recommended 4-inch distance helps maintain optimal performance and increases the reliability of the detection system. Adhering to these deployment standards is crucial for safety and for meeting code requirements in alarm system installations.