Hvac Duct Smoke Detection

Duct smoke detection may be useful in preventing injury and property dam age in instances such as the following.

Hvac duct smoke detection.

The duct smoke detector should be compatible with building automation and fire alarm systems. 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. 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. These devices are designed for prevention of smoke recirculation in areas by the air handling systems.

Its purpose is to prevent the re circulation of smoke from an area on fire to areas unaffected by the fire when used with a xp95 or discovery detector. Tool free plug in sampling tubes speed and simplify installation. 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. While i am a licensed master hvac contractor i am not a code official but here is my answer.

Duct smoke detectors provide 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. This one hour webinar includes basic code and testing requirements the different types of duct smoke detectors and how they operate installation and placem. 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 detectors smoke detection nfpa 90a code requirements. The duct smoke detector is equipped with an auxiliary relay. Duct detectors aren t a replacement for room sensors.

Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring. The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through hvac ducts. The damper is still protected with the in duct smoke detector to ensure the rating of the wall to shut the damper upon detection of smoke and if the in duct smoke detector activates then we go through the shut down process of the fans and dampers throughout the building as exampled above. I ve had this question asked of me several times.

Therefore duct smoke detectors are typically considered mechanical equipment devices instead of life safety devices. One unit can accommodate multiple installation footprints to overcome mounting constraints.