For closure activation, how many feet away from a door should smoke detectors be positioned?

Smoke detectors should be positioned approximately 5 feet away from doors to ensure their proper functioning. This distance helps to prevent false alarms that can occur due to air currents generated by opened or closed doors, which can disturb smoke detection. Maintaining this distance provides accurate readings of smoke presence without interference from everyday activities, enhancing the effectiveness of the detector in sensing actual fire conditions. This guideline is part of fire safety standards to ensure optimal operation and reliability of smoke detection systems, particularly in residential and commercial settings.