Hvac Duct Smoke Detection
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Duct detectors smoke detection nfpa 90a code requirements.
Hvac duct smoke detection. 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. Duct smoke detection may be useful in preventing injury and property dam age in instances such as the following. The duct smoke detector should be compatible with building automation and fire alarm systems. I ve had this question asked of me several times.
The intelligent duct smoke detector provides early detection of smoke in the air moving through heating and ventilation hvac ducts in commercial and industrial premises. One unit can accommodate multiple installation footprints to overcome mounting constraints. Fans blowers and complete systems may be shut down in the event of smoke detection. Tool free plug in sampling tubes speed and simplify installation.
Duct smoke detectors provide early detection of smoke and products of combustion present in air moving through hvac ducts. These devices are designed for prevention of smoke recirculation in areas by the air handling systems. Hvac duct smoke detection. This one hour webinar includes basic code and testing requirements the different types of duct smoke detectors and how they operate installation and placem.
Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring. A duct smoke detector should shut off a typical blower and fresh air and turn on the exhaust. While i am a licensed master hvac contractor i am not a code official but here is my answer. Therefore duct smoke detectors are typically considered mechanical equipment devices instead of life safety devices.
Duct detectors aren t a replacement for room sensors. If the duct system is designed to carry more than 2000 cfm 5 tons nominal of air you need one in the return if imc is being followed and the supply if nfpa is being followed. A heating ventilating or air conditioning hvac fan motor overheats and resulting smoke is sensed by the duct smoke detector installed in the main supply duct. The duct smoke detector is equipped with an auxiliary relay.
The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through hvac ducts. Duct smoke detectors are a key component of fire detection and fire alarm systems.
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