Furthermore intentions for using duct smoke detectors should not be a substitute for area smoke detectors.
Hvac duct mounted smoke detector.
Tool free plug in sampling tubes speed and simplify installation.
Duct smoke detectors are a key component of fire detection and fire alarm systems.
The duct smoke detector should be compatible with building automation and fire alarm systems.
The duct smoke detectors are constructed of a black high impact polymer with a clear plastic cover and attach directly to the hvac system duct.
It is preferred that the occupied and non occupied areas and spaces have smoke detectors simply because the fans in air handlers or that move air through duct work may not be operational at all times so having smoke detectors in the duct work will not offer the amount of protection that smoke detectors would offer in the spaces or area served whether those areas or spaces are occupied or not.
The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through hvac ducts.
Therefore they should complement the buildings fire detection system and not serve as the primary fire detection system.
The perforated sampling tube which spans the duct is placed in the airflow upstream of the exhaust tube which causes a pressure differential in the duct detector.
One unit can accommodate multiple installation footprints to overcome mounting constraints.
Smoke heat and duct detectors model description e pd photoelectric smoke detector.
Duct detectors aren t a replacement for room sensors.
Both also have exceptions that allow the deletion of the return duct smoke detectors if the area served is supplied with area smoke detectors and they are configured to control the hvac system in the same way that the duct detectors would have.
For fire smoke dampers should i use an in duct spot type smoke detector or a duct detector sampling tube style duct detectors are listed for a minimum air velocity of 100 fpm feet per minute.
Typical smoke detection devices used for duct application include smoke detector sensors within a housing mounted.
If you are to ensure the rating of the wall at duct penetrations dampers you must provide coverage per the international building code ibc 2015.
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.
Hvac duct smoke detection.
Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring.
Nfpa 72 also states that a duct smoke detector is not allowed to replace an area smoke detector.
A duct smoke detector should shut off a typical blower and fresh air and turn on the exhaust.
Nor should it serve as an early warning detection system.
