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    Duct Detectors

    InnovairFlex™ 4-Wire Duct Smoke Detector

    InnovairFlex™ 4-wire photoelectric duct smoke detectors offer 2 sensors to 1 powerboard capability in standard (D4120) and watertight (D4120W) versions.

    Overview

    InnovairFlex™ D4120 4-wire photoelectric duct smoke detectors feature a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 ft/min, temperatures of –4 °F to 158 °F, and a humidity range of 0 to 95% non-condensing. A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance. An improved cover design isolates the sensor head from the low-flow feature for simple maintenance.The InnovairFlex D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water.

    Features & Benefits:
    • Patented sampling tube installs from front or back of the detector with no tools required
    • Increased wiring space with a newly added 3/4 inch conduit knockout
    • One easy-access Test/Reset button and improved LED status
    • Patented interconnect feature for multi-fan shutdown
    • New high contrast terminal designations
    • Built-in short circuit protection from operator wiring errors
    • Field selectable settings for configuring the detector
    • Two DPDT Form C relay contacts
    • 24V AC/DC or 120V AC
    • Backward compatibility with existing Innovair products, including remote accessories
    Certifications:
    • UL/ULC
    • FM
    • CSFM
    Others
    Name
    Description
    File Size
    Date
    Size
    Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
    application/pdf 234.27 KB
    1/1/2011
    234.27 KB
    TRADE PRODUCT LIST Catalog
    application/pdf 4.15 MB
    1/23/2024
    4.15 MB
    Leaders in Life- Safety- Technology Catalogs
    application/pdf 9.8 MB
    1/8/2024
    9.8 MB
    D4120 BIM File
    application/x-tika-msoffice 1.31 MB
    10/3/2024
    1.31 MB
    D4120W BIM File
    application/x-tika-msoffice 740 KB
    10/3/2024
    740 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 57.29 KB
    12/1/2011
    57.29 KB
    D4120W Duct Smoke Detector
    application/pdf 1.85 MB
    6/1/2010
    1.85 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    application/pdf 1.84 MB
    10/3/2024
    1.84 MB
    Duct Smoke Detectors Applications Guide
    application/pdf 943.23 KB
    2/1/2015
    943.23 KB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    application/pdf 1.84 MB
    10/10/2024
    1.84 MB
    Photoelectric vs. Ionization Technology Brochure
    application/pdf 344.17 KB
    10/1/2013
    344.17 KB
    Duct Detector Testing and Maintenance
    application/pdf 190.6 KB
    12/1/2012
    190.6 KB
    Watertight Duct Smoke Detector Datasheet
    application/pdf 490.85 KB
    1/1/2012
    490.85 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 57.31 KB
    12/1/2011
    57.31 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    10/3/2024
    2.34 MB
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    application/pdf 426.85 KB
    7/1/2013
    426.85 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    application/pdf 234.32 KB
    4/1/2009
    234.32 KB
    D4120W Duct Smoke Detector Manual
    application/pdf 1.85 MB
    6/1/2010
    1.85 MB
    InnovairFlex: Push Button Testing Brochure
    application/pdf 418.79 KB
    6/1/2013
    418.79 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    10/3/2024
    2.34 MB
    Photoelectric vs. Ionization Technology
    application/pdf 343.57 KB
    10/1/2013
    343.57 KB
    Duct Detector Testing and Maintenance Brochure
    application/pdf 190.83 KB
    12/1/2012
    190.83 KB
    InnovairFlex LED Function Set Incorrectly
    application/pdf 38.72 KB
    9/27/2012
    38.72 KB
    Duct Detector Evolution
    application/pdf 46.7 KB
    5/17/2023
    46.7 KB
    HVAC Product Overview Brochure
    application/pdf 539.79 KB
    12/1/2015
    539.79 KB
    HVAC Product Overview
    application/pdf 538.94 KB
    12/1/2015
    538.94 KB
    InnovairFlex Duct Smoke Detectors
    application/pdf 326.82 KB
    9/1/2012
    326.82 KB
    Duct Smoke Detector
    application/pdf 661.84 KB
    10/1/2013
    661.84 KB
    HVAC Products
    application/pdf 350.44 KB
    12/1/2015
    350.44 KB
    InnovairFlex Reset Enhancement
    application/pdf 40.74 KB
    3/1/2011
    40.74 KB
    InnovairFlex Duct Smoke Detectors FAQ
    application/pdf 327.18 KB
    9/1/2012
    327.18 KB
    Watertight Duct Smoke Detector
    application/pdf 490.81 KB
    1/1/2012
    490.81 KB
    HVAC Products Brochure
    application/pdf 352 KB
    12/1/2015
    352 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 57.36 KB
    12/1/2011
    57.36 KB
    Duct Detector Evolution Tech Bulletin
    application/pdf 51.96 KB
    10/1/2009
    51.96 KB
    Duct Smoke Detector Datasheet
    application/pdf 662.17 KB
    10/1/2012
    662.17 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    application/pdf 234.72 KB
    9/1/2004
    234.72 KB
    InnovairFlex Reset Enhancement Tech Bulletin
    application/pdf 41.38 KB
    3/1/2011
    41.38 KB
    DUCTSD & D4120 Cross Reference Guide
    application/pdf 284.72 KB
    12/1/2015
    284.72 KB
    DUCTSD & D4120 Cross Reference
    application/pdf 284.15 KB
    12/1/2015
    284.15 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 57.23 KB
    12/1/2011
    57.23 KB
    Brochure
    Name
    Description
    File Size
    Date
    Size
    Fire Safety Product Catalog
    application/pdf 3.65 MB
    5/11/2023
    3.65 MB
    Installation Instructions
    Name
    Description
    File Size
    Date
    Size
    D4120W Duct Smoke Detector Installation Document
    application/pdf 1.52 MB
    10/3/2024
    1.52 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.52 MB
    10/3/2024
    1.52 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.52 MB
    1/15/2025
    1.52 MB
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    application/pdf 1.42 MB
    3/13/2022
    1.42 MB
    Data Sheet
    Name
    Description
    File Size
    Date
    Size
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 86.19 KB
    10/5/2011
    86.19 KB
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    application/pdf 172.47 KB
    9/10/2024
    172.47 KB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 143.09 KB
    10/5/2011
    143.09 KB
    Name
    Description
    File Size
    Date
    Size
    Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
    application/pdf 234.27 KB
    1/1/2011
    234.27 KB
    TRADE PRODUCT LIST Catalog
    application/pdf 4.15 MB
    1/23/2024
    4.15 MB
    Leaders in Life- Safety- Technology Catalogs
    application/pdf 9.8 MB
    1/8/2024
    9.8 MB
    D4120 BIM File
    application/x-tika-msoffice 1.31 MB
    10/3/2024
    1.31 MB
    D4120W BIM File
    application/x-tika-msoffice 740 KB
    10/3/2024
    740 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 57.29 KB
    12/1/2011
    57.29 KB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 86.19 KB
    10/5/2011
    86.19 KB
    D4120W Duct Smoke Detector
    application/pdf 1.85 MB
    6/1/2010
    1.85 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    application/pdf 1.84 MB
    10/3/2024
    1.84 MB
    Duct Smoke Detectors Applications Guide
    application/pdf 943.23 KB
    2/1/2015
    943.23 KB
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    application/pdf 172.47 KB
    9/10/2024
    172.47 KB
    D4120W Duct Smoke Detector Installation Document
    application/pdf 1.52 MB
    10/3/2024
    1.52 MB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 143.09 KB
    10/5/2011
    143.09 KB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.52 MB
    10/3/2024
    1.52 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.52 MB
    1/15/2025
    1.52 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    application/pdf 1.84 MB
    10/10/2024
    1.84 MB
    Photoelectric vs. Ionization Technology Brochure
    application/pdf 344.17 KB
    10/1/2013
    344.17 KB
    Duct Detector Testing and Maintenance
    application/pdf 190.6 KB
    12/1/2012
    190.6 KB
    Watertight Duct Smoke Detector Datasheet
    application/pdf 490.85 KB
    1/1/2012
    490.85 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 57.31 KB
    12/1/2011
    57.31 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    10/3/2024
    2.34 MB
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    application/pdf 426.85 KB
    7/1/2013
    426.85 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    application/pdf 234.32 KB
    4/1/2009
    234.32 KB
    Fire Safety Product Catalog
    application/pdf 3.65 MB
    5/11/2023
    3.65 MB
    D4120W Duct Smoke Detector Manual
    application/pdf 1.85 MB
    6/1/2010
    1.85 MB
    InnovairFlex: Push Button Testing Brochure
    application/pdf 418.79 KB
    6/1/2013
    418.79 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    10/3/2024
    2.34 MB
    Photoelectric vs. Ionization Technology
    application/pdf 343.57 KB
    10/1/2013
    343.57 KB
    Duct Detector Testing and Maintenance Brochure
    application/pdf 190.83 KB
    12/1/2012
    190.83 KB
    InnovairFlex LED Function Set Incorrectly
    application/pdf 38.72 KB
    9/27/2012
    38.72 KB
    Duct Detector Evolution
    application/pdf 46.7 KB
    5/17/2023
    46.7 KB
    HVAC Product Overview Brochure
    application/pdf 539.79 KB
    12/1/2015
    539.79 KB
    HVAC Product Overview
    application/pdf 538.94 KB
    12/1/2015
    538.94 KB
    InnovairFlex Duct Smoke Detectors
    application/pdf 326.82 KB
    9/1/2012
    326.82 KB
    Duct Smoke Detector
    application/pdf 661.84 KB
    10/1/2013
    661.84 KB
    HVAC Products
    application/pdf 350.44 KB
    12/1/2015
    350.44 KB
    InnovairFlex Reset Enhancement
    application/pdf 40.74 KB
    3/1/2011
    40.74 KB
    InnovairFlex Duct Smoke Detectors FAQ
    application/pdf 327.18 KB
    9/1/2012
    327.18 KB
    Watertight Duct Smoke Detector
    application/pdf 490.81 KB
    1/1/2012
    490.81 KB
    HVAC Products Brochure
    application/pdf 352 KB
    12/1/2015
    352 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 57.36 KB
    12/1/2011
    57.36 KB
    Duct Detector Evolution Tech Bulletin
    application/pdf 51.96 KB
    10/1/2009
    51.96 KB
    Duct Smoke Detector Datasheet
    application/pdf 662.17 KB
    10/1/2012
    662.17 KB
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    application/pdf 1.42 MB
    3/13/2022
    1.42 MB
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    application/pdf 234.72 KB
    9/1/2004
    234.72 KB
    InnovairFlex Reset Enhancement Tech Bulletin
    application/pdf 41.38 KB
    3/1/2011
    41.38 KB
    DUCTSD & D4120 Cross Reference Guide
    application/pdf 284.72 KB
    12/1/2015
    284.72 KB
    DUCTSD & D4120 Cross Reference
    application/pdf 284.15 KB
    12/1/2015
    284.15 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 57.23 KB
    12/1/2011
    57.23 KB
    Name
    Description
    File Size
    Date
    Size
    Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
    234.27 KB
    1/1/2011
    TRADE PRODUCT LIST Catalog
    4.15 MB
    1/23/2024
    Leaders in Life- Safety- Technology Catalogs
    9.8 MB
    1/8/2024
    D4120 BIM File
    1.31 MB
    10/3/2024
    D4120W BIM File
    740 KB
    10/3/2024
    InnovairFlex Duct Smoke Detector
    57.29 KB
    12/1/2011
    D4120W Duct Smoke Detector
    1.85 MB
    6/1/2010
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    1.84 MB
    10/3/2024
    Duct Smoke Detectors Applications Guide
    943.23 KB
    2/1/2015
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    1.84 MB
    10/10/2024
    Photoelectric vs. Ionization Technology Brochure
    344.17 KB
    10/1/2013
    Duct Detector Testing and Maintenance
    190.6 KB
    12/1/2012
    Watertight Duct Smoke Detector Datasheet
    490.85 KB
    1/1/2012
    InnovairFlex Duct Smoke Detector Engineering Specs
    57.31 KB
    12/1/2011
    D4120 and D4120W CAD Drawing
    2.34 MB
    10/3/2024
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    426.85 KB
    7/1/2013
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    234.32 KB
    4/1/2009
    D4120W Duct Smoke Detector Manual
    1.85 MB
    6/1/2010
    InnovairFlex: Push Button Testing Brochure
    418.79 KB
    6/1/2013
    D4120 and D4120W CAD Drawing
    2.34 MB
    10/3/2024
    Photoelectric vs. Ionization Technology
    343.57 KB
    10/1/2013
    Duct Detector Testing and Maintenance Brochure
    190.83 KB
    12/1/2012
    InnovairFlex LED Function Set Incorrectly
    38.72 KB
    9/27/2012
    Duct Detector Evolution
    46.7 KB
    5/17/2023
    HVAC Product Overview Brochure
    539.79 KB
    12/1/2015
    HVAC Product Overview
    538.94 KB
    12/1/2015
    InnovairFlex Duct Smoke Detectors
    326.82 KB
    9/1/2012
    Duct Smoke Detector
    661.84 KB
    10/1/2013
    HVAC Products
    350.44 KB
    12/1/2015
    InnovairFlex Reset Enhancement
    40.74 KB
    3/1/2011
    InnovairFlex Duct Smoke Detectors FAQ
    327.18 KB
    9/1/2012
    Watertight Duct Smoke Detector
    490.81 KB
    1/1/2012
    HVAC Products Brochure
    352 KB
    12/1/2015
    InnovairFlex Duct Smoke Detector Engineering Specs
    57.36 KB
    12/1/2011
    Duct Detector Evolution Tech Bulletin
    51.96 KB
    10/1/2009
    Duct Smoke Detector Datasheet
    662.17 KB
    10/1/2012
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    234.72 KB
    9/1/2004
    InnovairFlex Reset Enhancement Tech Bulletin
    41.38 KB
    3/1/2011
    DUCTSD & D4120 Cross Reference Guide
    284.72 KB
    12/1/2015
    DUCTSD & D4120 Cross Reference
    284.15 KB
    12/1/2015
    InnovairFlex Duct Smoke Detector
    57.23 KB
    12/1/2011
    Fire Safety Product Catalog
    3.65 MB
    5/11/2023
    D4120W Duct Smoke Detector Installation Document
    1.52 MB
    10/3/2024
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    1.52 MB
    10/3/2024
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    1.52 MB
    1/15/2025
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    1.42 MB
    3/13/2022
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    86.19 KB
    10/5/2011
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    172.47 KB
    9/10/2024
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    143.09 KB
    10/5/2011
    Product Number
    Part Number
    Description
    Leaf Category
    Thumbnail
    Add to list
    D4120
    InnovairFlex™ 4-Wire Photoelectric Duct Smoke Detector
    https://honeywell.scene7.com/is/image/Honeywell65/HBT-Fire-D4120-HORIZONTAL-STRAIGHT-HiRes
    D4120
    InnovairFlex™ 4-Wire Photoelectric Duct Smoke Detector
    https://honeywell.scene7.com/is/image/Honeywell65/HBT-Fire-D4120-HORIZONTAL-STRAIGHT-HiRes
    D4120W
    InnovairFlex™ Watertight 4-Wire Photoelectric Duct Smoke Detector
    D4120W
    InnovairFlex™ Watertight 4-Wire Photoelectric Duct Smoke Detector