Where can a System Sensor duct-mounted smoke detector be installed in relation to the duct?
System Sensor duct-mounted detectors can be installed horizontally and vertically to — and on top of, within and underneath — the duct. However, we do not recommend installing underneath the duct because condensation may drain into the electronic circuitry and cause electrical damage. To determine the best location, System Sensor recommends comparing the pressure differential between the sampling and exhaust tube. The pressure differential must be within specified limits of .0015 to 1.20 inches/water for photoelectric smoke detectors. The detector housing cover must be securely fastened to complete the airtight enclosure for proper air sampling and to restrict contaminants from entering the detector head.
