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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.

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 228.38 KB
6/22/2022
228.38 KB
InnovairFlex Duct Smoke Detector
application/pdf 51.33 KB
7/15/2022
51.33 KB
DUCTSD & D4120 Cross Reference
application/pdf 281.79 KB
7/17/2022
281.79 KB
DUCTSD & D4120 Cross Reference Guide
application/pdf 281.79 KB
7/15/2022
281.79 KB
InnovairFlex Reset Enhancement Tech Bulletin
application/pdf 38.63 KB
7/15/2022
38.63 KB
Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
application/pdf 227.69 KB
7/15/2022
227.69 KB
Duct Smoke Detector Datasheet
application/pdf 589.61 KB
8/16/2022
589.61 KB
Duct Detector Evolution Tech Bulletin
application/pdf 46.7 KB
6/28/2022
46.7 KB
InnovairFlex Duct Smoke Detector Engineering Specs
application/pdf 51.38 KB
8/9/2022
51.38 KB
HVAC Products Brochure
application/pdf 348.64 KB
4/29/2022
348.64 KB
Watertight Duct Smoke Detector
application/pdf 529.2 KB
8/16/2022
529.2 KB
InnovairFlex Duct Smoke Detectors FAQ
application/pdf 321.99 KB
7/18/2022
321.99 KB
InnovairFlex Reset Enhancement
application/pdf 38.63 KB
7/18/2022
38.63 KB
HVAC Products
application/pdf 348.64 KB
7/18/2022
348.64 KB
Duct Smoke Detector
application/pdf 589.61 KB
8/16/2022
589.61 KB
InnovairFlex Duct Smoke Detectors
application/pdf 321.99 KB
7/18/2022
321.99 KB
HVAC Product Overview
application/pdf 536.86 KB
7/18/2022
536.86 KB
HVAC Product Overview Brochure
application/pdf 536.86 KB
6/22/2022
536.86 KB
Duct Detector Evolution
application/pdf 46.7 KB
7/18/2022
46.7 KB
InnovairFlex LED Function Set Incorrectly
application/pdf 36.45 KB
7/18/2022
36.45 KB
Duct Detector Testing and Maintenance Brochure
application/pdf 186.4 KB
7/18/2022
186.4 KB
Photoelectric vs. Ionization Technology
application/pdf 315.28 KB
7/18/2022
315.28 KB
D4120 and D4120W CAD Drawing
application/zip 2.34 MB
7/18/2022
2.34 MB
InnovairFlex: Push Button Testing Brochure
application/pdf 390.08 KB
7/18/2022
390.08 KB
D4120W Duct Smoke Detector Manual
application/pdf 1.84 MB
8/10/2022
1.84 MB
Wiring Diagram for D4120 to SSK451 with PS24LOW
application/pdf 227.69 KB
7/18/2022
227.69 KB
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
application/pdf 397.75 KB
7/18/2022
397.75 KB
D4120 and D4120W CAD Drawing
application/zip 2.34 MB
8/9/2022
2.34 MB
InnovairFlex Duct Smoke Detector Engineering Specs
application/pdf 51.33 KB
8/9/2022
51.33 KB
Watertight Duct Smoke Detector Datasheet
application/pdf 529.2 KB
8/16/2022
529.2 KB
Duct Detector Testing and Maintenance
application/pdf 186.4 KB
7/18/2022
186.4 KB
Photoelectric vs. Ionization Technology Brochure
application/pdf 315.28 KB
7/18/2022
315.28 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
application/pdf 1.84 MB
8/10/2022
1.84 MB
Duct Smoke Detectors Applications Guide
application/pdf 898.78 KB
7/18/2022
898.78 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
application/pdf 1.84 MB
8/12/2022
1.84 MB
D4120W Duct Smoke Detector
application/pdf 1.84 MB
8/12/2022
1.84 MB
Brochure
Name
Description
File Size
Date
Size
Fire Safety Product Catalog
application/pdf 3.65 MB
6/16/2022
3.65 MB
Installation Instructions
Name
Description
File Size
Date
Size
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
application/pdf 1.42 MB
3/13/2022
1.42 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
application/pdf 1.55 MB
8/25/2022
1.55 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
application/pdf 1.55 MB
8/25/2022
1.55 MB
D4120W Duct Smoke Detector Installation Document
application/pdf 1.55 MB
8/25/2022
1.55 MB
Data Sheet
Name
Description
File Size
Date
Size
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
application/pdf 140.38 KB
8/16/2022
140.38 KB
InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
application/pdf 169.92 KB
8/16/2022
169.92 KB
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
application/pdf 83.23 KB
8/16/2022
83.23 KB
Name
Description
File Size
Date
Size
Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
228.38 KB
6/22/2022
228.38 KB
InnovairFlex Duct Smoke Detector
51.33 KB
7/15/2022
51.33 KB
DUCTSD & D4120 Cross Reference
281.79 KB
7/17/2022
281.79 KB
DUCTSD & D4120 Cross Reference Guide
281.79 KB
7/15/2022
281.79 KB
InnovairFlex Reset Enhancement Tech Bulletin
38.63 KB
7/15/2022
38.63 KB
Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
227.69 KB
7/15/2022
227.69 KB
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
1.42 MB
3/13/2022
1.42 MB
Duct Smoke Detector Datasheet
589.61 KB
8/16/2022
589.61 KB
Duct Detector Evolution Tech Bulletin
46.7 KB
6/28/2022
46.7 KB
InnovairFlex Duct Smoke Detector Engineering Specs
51.38 KB
8/9/2022
51.38 KB
HVAC Products Brochure
348.64 KB
4/29/2022
348.64 KB
Watertight Duct Smoke Detector
529.2 KB
8/16/2022
529.2 KB
InnovairFlex Duct Smoke Detectors FAQ
321.99 KB
7/18/2022
321.99 KB
InnovairFlex Reset Enhancement
38.63 KB
7/18/2022
38.63 KB
HVAC Products
348.64 KB
7/18/2022
348.64 KB
Duct Smoke Detector
589.61 KB
8/16/2022
589.61 KB
InnovairFlex Duct Smoke Detectors
321.99 KB
7/18/2022
321.99 KB
HVAC Product Overview
536.86 KB
7/18/2022
536.86 KB
HVAC Product Overview Brochure
536.86 KB
6/22/2022
536.86 KB
Duct Detector Evolution
46.7 KB
7/18/2022
46.7 KB
InnovairFlex LED Function Set Incorrectly
36.45 KB
7/18/2022
36.45 KB
Duct Detector Testing and Maintenance Brochure
186.4 KB
7/18/2022
186.4 KB
Photoelectric vs. Ionization Technology
315.28 KB
7/18/2022
315.28 KB
D4120 and D4120W CAD Drawing
2.34 MB
7/18/2022
2.34 MB
InnovairFlex: Push Button Testing Brochure
390.08 KB
7/18/2022
390.08 KB
D4120W Duct Smoke Detector Manual
1.84 MB
8/10/2022
1.84 MB
Fire Safety Product Catalog
3.65 MB
6/16/2022
3.65 MB
Wiring Diagram for D4120 to SSK451 with PS24LOW
227.69 KB
7/18/2022
227.69 KB
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
397.75 KB
7/18/2022
397.75 KB
D4120 and D4120W CAD Drawing
2.34 MB
8/9/2022
2.34 MB
InnovairFlex Duct Smoke Detector Engineering Specs
51.33 KB
8/9/2022
51.33 KB
Watertight Duct Smoke Detector Datasheet
529.2 KB
8/16/2022
529.2 KB
Duct Detector Testing and Maintenance
186.4 KB
7/18/2022
186.4 KB
Photoelectric vs. Ionization Technology Brochure
315.28 KB
7/18/2022
315.28 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
1.84 MB
8/10/2022
1.84 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
8/25/2022
1.55 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
8/25/2022
1.55 MB
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
140.38 KB
8/16/2022
140.38 KB
D4120W Duct Smoke Detector Installation Document
1.55 MB
8/25/2022
1.55 MB
InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
169.92 KB
8/16/2022
169.92 KB
Duct Smoke Detectors Applications Guide
898.78 KB
7/18/2022
898.78 KB
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
83.23 KB
8/16/2022
83.23 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
1.84 MB
8/12/2022
1.84 MB
D4120W Duct Smoke Detector
1.84 MB
8/12/2022
1.84 MB
Name
Description
File Size
Date
Size
Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
228.38 KB
6/22/2022
InnovairFlex Duct Smoke Detector
51.33 KB
7/15/2022
DUCTSD & D4120 Cross Reference
281.79 KB
7/17/2022
DUCTSD & D4120 Cross Reference Guide
281.79 KB
7/15/2022
InnovairFlex Reset Enhancement Tech Bulletin
38.63 KB
7/15/2022
Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
227.69 KB
7/15/2022
Duct Smoke Detector Datasheet
589.61 KB
8/16/2022
Duct Detector Evolution Tech Bulletin
46.7 KB
6/28/2022
InnovairFlex Duct Smoke Detector Engineering Specs
51.38 KB
8/9/2022
HVAC Products Brochure
348.64 KB
4/29/2022
Watertight Duct Smoke Detector
529.2 KB
8/16/2022
InnovairFlex Duct Smoke Detectors FAQ
321.99 KB
7/18/2022
InnovairFlex Reset Enhancement
38.63 KB
7/18/2022
HVAC Products
348.64 KB
7/18/2022
Duct Smoke Detector
589.61 KB
8/16/2022
InnovairFlex Duct Smoke Detectors
321.99 KB
7/18/2022
HVAC Product Overview
536.86 KB
7/18/2022
HVAC Product Overview Brochure
536.86 KB
6/22/2022
Duct Detector Evolution
46.7 KB
7/18/2022
InnovairFlex LED Function Set Incorrectly
36.45 KB
7/18/2022
Duct Detector Testing and Maintenance Brochure
186.4 KB
7/18/2022
Photoelectric vs. Ionization Technology
315.28 KB
7/18/2022
D4120 and D4120W CAD Drawing
2.34 MB
7/18/2022
InnovairFlex: Push Button Testing Brochure
390.08 KB
7/18/2022
D4120W Duct Smoke Detector Manual
1.84 MB
8/10/2022
Wiring Diagram for D4120 to SSK451 with PS24LOW
227.69 KB
7/18/2022
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
397.75 KB
7/18/2022
D4120 and D4120W CAD Drawing
2.34 MB
8/9/2022
InnovairFlex Duct Smoke Detector Engineering Specs
51.33 KB
8/9/2022
Watertight Duct Smoke Detector Datasheet
529.2 KB
8/16/2022
Duct Detector Testing and Maintenance
186.4 KB
7/18/2022
Photoelectric vs. Ionization Technology Brochure
315.28 KB
7/18/2022
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
1.84 MB
8/10/2022
Duct Smoke Detectors Applications Guide
898.78 KB
7/18/2022
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
1.84 MB
8/12/2022
D4120W Duct Smoke Detector
1.84 MB
8/12/2022
Fire Safety Product Catalog
3.65 MB
6/16/2022
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
1.42 MB
3/13/2022
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
8/25/2022
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
8/25/2022
D4120W Duct Smoke Detector Installation Document
1.55 MB
8/25/2022
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
140.38 KB
8/16/2022
InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
169.92 KB
8/16/2022
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
83.23 KB
8/16/2022
Image
SKU
Description
alt
D4120W
InnovairFlex™ Watertight 4-Wire Photoelectric Duct Smoke Detector
Image
SKU
Description
alt
D4120W
InnovairFlex™ Watertight 4-Wire Photoelectric Duct Smoke Detector