How far must a smoke detector be installed from a smoke damper that is installed within a duct?

The installation distance for a smoke detector from a smoke damper within a duct is important to ensure the effective functioning of the smoke detection system. A smoke detector must be installed at least 5 feet away from a smoke damper. This distance is necessary because a smoke damper is designed to restrict airflow when smoke is detected to prevent the spread of fire, which in turn can affect the detection capabilities of nearby smoke detectors. If a smoke detector is too close to a damper, it may receive inconsistent smoke patterns during a fire or incorrect signals that can lead to false alarms or delayed alerts.

By adhering to the 5-foot requirement, you ensure that the smoke detector can accurately assess smoke presence without interference from the smoke damper's operation. This distance helps to maintain the reliability and responsiveness of the smoke detection system, contributing to overall safety in the building.