Wall-mounted heat detectors must be mounted between ____ and ____ inches from a ceiling.

Wall-mounted heat detectors are required to be installed between 4 inches and 12 inches from the ceiling. This range is crucial for ensuring optimal detection of heat increases in a space. When installed within this range, the detectors can effectively sense changes in temperature that may indicate a fire. The positioning also helps in reducing the likelihood of false alarms caused by normal temperature fluctuations associated with regular activities in the room.

Being too close to the ceiling may impair the detector's ability to sense heat, especially if the heated air does not reach that height quickly. Conversely, positioning the detector lower than this range could expose it to environmental factors, such as airflow from air conditioning or heating systems, which might also hinder its performance and effectiveness.

This specific mounting range is aligned with industry standards and ensures compliance with fire safety codes, helping to safeguard lives and property by allowing for early detection of potential fire hazards.