What is the maximum distance a spot-type heat detector can be mounted from the ceiling?

The maximum distance a spot-type heat detector can be mounted from the ceiling is 12 inches. This guideline is established to ensure that the heat detector functions effectively in detecting temperature increases indicative of a fire. When mounted too far from the ceiling, the detector may not respond quickly enough to changes in temperature, especially since hot air rises. By limiting the mounting distance to 12 inches, the detector is positioned within a range where it can accurately sense heat emanating from a fire, optimizing its performance and enhancing the overall safety of the environment. This standard is crucial for maintaining effective fire alarm systems in various settings.