System Sensor Photoelectric vs Ionization Technology

InnovairFlex Duct Smoke Detection vs Ionization Technology smoke detectors can use either photoelectric or ionization technologies However only one is the NFPA technology for use in HVAC applications choose photoelectric technology for duct smoke applications Photoelectric technology is recommended by the National Alarm Code NFPA 72 reads as follows almost fire scenario in an air handling system the point detection will be some distance from the fire source the smoke will be cooler and more visible because the growth of sub micron particles into larger particles to agglomeration and recombination For these reasons detection technology has advantages ionization detection technology in air duct system Photoelectric detection operates better in the harsh of ventilation systems for example high and condensation can cause false alarms with detectors Photoelectric detectors operate more with far less chance of false alarms Only photoelectric duct smoke detectors Low Flow capability which operates air speeds as low as 100 feet per minute 10 13