Duct Air Leakage Tester – Model 6900

The fastest and most convenient duct air leakage tester in the industry

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The Kanomax Duct Air Leakage Tester (DALT) – Model 6900 represents a significant advancement in the testing of commercial duct systems. This instrument is engineered to provide a combination of simplicity, accuracy, and convenience, making it a valuable tool for professionals in the HVAC industry.

User-Friendly and Accurate

Designed with user convenience in mind, the DALT 6900 offers a straightforward, step-by-step duct leakage test configuration. It automates the testing process based on the standards set out in the SMACNA HVAC Air Duct Leakage Test Manual, ensuring accuracy to ±2.5% of reading. This precision is critical for meeting industry standards and ensuring system integrity.

Portable and Efficient Design

Despite its robust construction and powerful onboard motor, the DALT 6900 is remarkably portable. It is equipped with pneumatic tires, facilitating easy transport across job sites while leaving a minimal footprint. This feature is especially beneficial for contractors working in various locations.

Intuitive Full Color HD Touch Screen Display

The device boasts an easy-to-follow, full color HD touch screen display. This interface guides the user through the ductwork leakage testing process, offering multiple choice configuration options for a tailored testing experience. The touch screen also allows for quick switching between measurement unit outputs, including Fahrenheit, Celsius, m³/s, CFM, l/s, and m³/h, enhancing its versatility.

Simplified Operation Without Orifice Plates

One of the standout features of the DALT 6900 is its elimination of the need for orifice plates. This design choice not only reduces the time required for testing but also minimizes potential errors. All necessary parts for the leakage tests are included with the unit, eliminating the need for additional research or orders for different projects.

Versatile Testing Options

The DALT 6900 is capable of performing both positive and negative (decay) pressure tests. This versatility is achieved through a simple rearrangement of the hose, saving time for contractors handling diverse test requirements.

Comprehensive Learning Resources

For detailed instructions and visual guidance, the DALT 6900 User Manual provides in-depth information on the various stages of the testing process. Additionally, users can quickly become proficient with the instrument by watching the 15-minute DALT 6900 Video Guide.

More Information

Navigate the tab section below to see this product’s Features & Benefits, Specifications, Resources, and more.

  • Easy transport to the job with a small footprint and pneumatic tires allow for smooth movement
  • Step-by-step test configuration and automated leakage testing based on the SMACNA Test Manual Capable of both positive and negative duct leakage testings
  • Meets and/or exceeds the following standards for testing:
    • BS EN 12237:2003 EU
    • BS EN 1507:2006 EU
    • DW/143 EU
    • Eurovent 2/2 EU
    • GB50243 GB
  • Our Duct Air Leakage Tester (DALT 6900), delivers the most accurate test results in either POSITIVE or NEGATIVE setting while delivering ±10 inches of water gauge pressure in the duct.
  • Accurate to ±2.5% of READING of volume flow
  • Stores data that can be downloaded easily to a USB flash drive for report generation from the commissioning engineer to the building owner or signing authority
  • Engineered with the end-user's perspective ensuring that it does what you need it to do and comes standard with a calibration* certificate.
  • The instrument is designed for easy transport to the job with a small footprint and fits thru roof hatches 21"x 20"
  • Order it with the optional Heavy Duty Construction Cover

*Kanomax offers annual NIST TRACEABLE calibrations at our facility in Andover, NJ.

Main Specifications
ModelDALT 6900
AirflowRangesFlow Grid: 2 to 377 CFM (4 to 640 m3/h)
Nozzle: 2 to 21 CFM (4 to 36 m3/h)
Accuracy2.5 % of READING ± 0.1 m3/h
Resolution0.01 m3/h
PressureRanges± 10 in.wg (± 2500 Pa) Duct Static Pressure
Accuracy1% of READING ± 1 Pa
Resolution0.1 Pa
TemperatureRanges32 to 140 °F (0 to 60 °C)
Accuracy± 0.5 °C
Resolution0.1 °C
Absolute PressureRanges20.6 to 38.3 in.Hg (70 to 130kPa)
Accuracy2% of READING
Power Source
(NOTE: DALT 6900 does not operate with temporary power
from an insufficient power supply.)
DALT 6900-0E110-120V, 1 Phase, 50/60Hz, 16A
DALT 6900-1E220-240V, 1 Phase, 50/60Hz, 10A
WeightApprox. 75kg (165lbs)
DimensionsW21 x D20 x H47 inches (54 x 50 x 120 mm)
Data loggingUp to 1000 measurements

General Specifications
Warranty2 years (except flex duct)
What’s IncludedMain unit, 2x Test Fixtures, 12 feet of Flexible Duct, Silicone Pressure Tube, Power Cord, Operation Manual, Calibration Certificate

Surface Area Coverage
Testing surface area (at 4 in. w.g.)Up to 10500 sq. ft.

User Manual


Data Sheet


Quick Start Guide


PQ Curve


  • Heavy Duty Construction Cover
  • Static Pressure Probe: Model 6700-08
  • 69000110-BLUE: Spare Pressure Tubing (1 meter)
  • 69000110-RED: Spare Pressure Tubing (1 meter)
  • 69000110-WHITE: Spare Pressure Tubing (1 meter)

Introducing the DALT Model 6900

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Getting Started with the DALT 6900

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Introducing the DALT Model 6900

The Kanomax Duct Air Leakage Tester – Model 6900 is the most advanced leakage tester for commercial duct systems.

See how easy the Kanomax DALT 6900 is to use out in the field by viewing our product overview video.

View Video

Getting Started with the DALT 6900

Learn about what’s included with the Duct Air Leakage Tester – Model 6900, its main features and modes, and how to run a leakage test easier than ever before.

View Video

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