Duct Smoke Detector Installation Location

The detector may be placed on the ceiling.

Duct smoke detector installation location. For proper air sampling duct pressure should be a minimum of 0 01 inches of water. It provides basic instruction on the installation of smoke detectors inside the ductwork. The duct detector should when possible be located a minimum of six duct widths downstream from a source of turbulence bends inlets or deflection plates. Due to smoke dilution in the ducts the duct detectors will respond more slowly than an area detector.

2 6 p n 3101210 rev 02 iss 28jan13. The inlet sampling tube is to be located between blades to avoid blockage of the airflow past the tube. Duct detectors smoke detection nfpa 90a code requirements this article references the current nfpa 90a standard for the installation of air conditioning and ventilating systems. To check the air velocity in the duct.

On levels without bedrooms install alarms in the living room or den or family room or near the stairway to the upper level or in both locations. Nfpa 90a is specific to air conditioning and heating systems installation. The international mechanical code section 606 2 2 also states that unless multiple air han dling systems share common supply or return air ducts or plenums duct detection is not required in the supply air system. Prior to the installation of the damper and smoke detector.

Duct smoke detectors should be located in the hvac area between 6 and 10 duct equivalent diameters of straight uninterrupted run. To ensure correct operation install the duct detector using the following guidelines. In the areas where smoke detectors become inaccessible designers should include smoke detection controls remote from the inaccessible area. 5 2 determine mounting location and configuration on ducts wider than 18 inches it is recommended that the detector be mounted downstream of a bend obstruction in the duct or the supply or return air inlet.

Installation of duct detectors can. Because carbon monoxide is slightly lighter than air and also because it may be found with warm rising air detectors should be placed on a wall about 5 feet above the floor. Install smoke alarms inside each bedroom outside each sleeping area and on every level of the home including the basement. Install the duct smoke detector on a flat section of hvac duct between six and ten duct widths from any bends or obstructions.

Designers should also remain aware that duct detectors may not substitute for area smoke detection. Do not place the detector right next to or over a fireplace or flame producing appliance. At these locations air flow is less turbulent and the air smoke mixture should be more homogenous refer to nfpa 90a 72 and 101 for more information. D4120 duct smoke detector d4s sensor component.