How far can a wall-mounted linear heat detector be installed from the ceiling?

The correct distance for a wall-mounted linear heat detector installation from the ceiling is 20 inches. This guideline is established for ensuring that the detector can effectively monitor the area it is designed to protect. When positioned at this height, the detector is able to respond promptly to changes in ambient temperature caused by potential fires, which tend to rise toward the ceiling.

Installing the detector too far from the ceiling may impede its ability to detect heat effectively, as hot air and smoke typically accumulate near the ceiling. Therefore, the specified distance is a balance between accessibility for maintenance and operational efficiency for fire detection. Understanding these guidelines helps ensure that fire safety systems are installed properly, enhancing safety in buildings.