Air Duct Type Smoke Detector

Commercial rooftop package units air shafts between ceiling plenum spaces dampers and extremely low or no air velocity applications. Nfpa 72 also states that a duct smoke detector is not allowed to replace an area smoke detector mainly because if the air handling unit ahu is not running the detector would not detect smoke. Designed for applications where standard external mount duct detectors cannot be used.

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An air sampling smoke detector assd is one of five ways listed in the national fire alarm and signaling code to detect smoke.

Air duct type smoke detector.

One unit can accommodate multiple installation footprints to overcome mounting constraints. Duct smoke detectors are a key component of fire detection and fire alarm systems. Duct smoke detectors use ionization or photoelectric sensing technology. The duct smoke detector should be compatible with building automation and fire alarm systems.

Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring. Duct detectors are never used for area smoke detection. The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through hvac ducts. A duct detector is a special type of sensor that checks air ducts for smoke.

The primary goal of duct type smoke detection is to prevent recirculation of smoke from the fire area to other areas of the building. They are important because they alert people that there s a fire somewhere in a building and shut down the air flow in the ducts to prevent smoke from spreading. Therefore duct smoke detectors are typically considered mechanical equipment devices instead of life safety devices. Tool free plug in sampling tubes speed and simplify installation.

A duct detector is a passive air sampling detector in that the hvac system must be operating to push the diluted smoke to the sampling tubes. Air products and controls hs 100 smoke detector applications include. Nfpa 90a is specific to air conditioning and heating systems installation. The duct smoke detector should be compatible with building automation and fire alarm systems.

Spot type smoke detectors projected beam type smoke detectors duct mounted smoke detectors and video image smoke detectors. Duct smoke detectors are usually designed to be used in air handling systems having a certain range of air velocities. It provides basic instruction on the installation of smoke detectors inside the ductwork. The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through hvac ducts.

Broad temperature and humidity ranges accommodate exposure to environmental extremes. Csfm listed mea accepted. 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. For this reason duct smoke detectors should be located on the downstream side of filters.

Ionization duct smoke detectors react to.