Duct Smoke Detector-Addressable (E-PDD)

The duct smoke detector's primary purpose is to provide early warning of an impending fire and shut down the HVAC unit in order to prevent smoke from circulating throughout the building. The duct smoke detector is designed for use in duct applications where temperatures can exceed standard detector capabilities.

Air is introduced to the duct smoke detector's sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through an exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the duct smoke detector notifies the fire alarm control panel.

The device address is set using the two rotary switches located on the front of the unit. One device address is required.  The detector is capable of performing comprehensive selfdiagnostics and storing the results.  

In installations where the duct smoke detector’s controls and indicators are hidden from view, a remote test station or an LED indicator can be connected to the detector to provide these functions.

Standard Features

  • Less than 2" deep for easy installation and applications where space is tight
  • -4°F to 158°F (-20°C to 70°C) operating range with 100 ft/min. to 4,000 ft/min air velocity rating assures reliability under harsh environmental conditions
  • Status LEDs remain visible through clear assembly cover
  • Rotary dial addressing
  • Cover monitor switch for added security
  • Standard sampling tube spacing for easy drop-in migration from other detectors
  • Sampling tube can be installed with or without the cover in place and can be rotated in 45-degree increments to ensure proper alignment with duct airflow
  • 15.2 to 19.95 Vdc operation
  • Magnet-activated test switch
  • One individually programmable Form C auxiliary alarm relay for controlling ancillary equipment (e.g., HVAC controls) rated at 2A, 30Vdc (resistive)
  • No special tools required for easy access to field connections
  • Environmental compensation with differential sensing for reliable, stable, and drift-free sensitivity
  • Wide 0.79% to 2.46% obscuration/ft. smoke sensitivity
  • Identification of dirty or defective detectors
  • Measures 8" x 5-1/2" x 2"
  • Agency Listings: UL, ULC, FM, CSFM, MEA

Note: The onboard relay follows the unit alarm.

Note: Unit comes with mounting template, sealing gaskets for sampling tube and exhaust tube duct work entry points, sampling tube plug, two 1" #10 sheet metal self-tapping screws, exhaust tube, and test magnet.

Note: Order the sampling tube separately.


Duct Smoke Detector-Addressable (E-PDD)
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  • Item #: E-PDD
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Price $236.00

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