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Receive a 15% discount on your next purchase of a DALT 6900 until March 30, 2021!*

*This promotional offer is only valid for end-users that purchase direct from Kanomax USA. Wholesalers, distributors, and other third-party resellers are not eligible.

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

Kanomax has developed the most advanced Duct Air Leakage Tester (DALT) for commercial duct systems. It’s designed to be simple to use, accurate, and extremely convenient. The instrument provides step-by-step test configuration and automated leakage testing based on the SMACNA HVAC Air Duct Leakage Test Manual, and is accurate to ±2.5% of reading. Though built tough with an on-board, powerful motor, the DALT 6900 is very easy to transport on its pneumatic tires and leaves little to no footprint on the job site.

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  • 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.

Model DALT 6900
Air Flow Ranges Flow Grid: 2 to 377 CFM (4 to 640 m3/h)
Nozzle: 2 to 21 CFM (4 to 36 m3/h)
Accuracy 2.5 % of READING ± 0.1 m3/h
Resolution 0.01 m3/h
Pressure Ranges ± 10 in.wg (± 2500 Pa) Duct Static Pressure
Accuracy 1% of READING ± 1 Pa
Resolution 0.1 Pa
Temperature Ranges 32 to 140 °F (0 to 60 °C)
Accuracy ±0.5 °C
Resolution 0.1 °C
Absolute Pressure Ranges 20.6 to 38.3 in.Hg (70 to 130kPa)
Accuracy 2% of READING
Resolution 0.1kPa
Power Source
(DALT 6900 does not operate with temporary power
from an insufficient power supply.)
DALT 6900-0E 110-120V, 1 Phase, 50/60Hz, 16A
DALT 6900-1E 220-240V, 1 Phase, 50/60Hz, 10A
Weight Approx. 75kg (165lbs)
Dimensions W21 x D20 x H47 inches (54 x 50 x 120 mm)
Data logging Up to 1000 measurements
General Specifications
Interface USB
Datalogging YES
Warranty 2 years (except flex duct)
What’s Included Main unit, 2x Test Fixture, 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.



Energy Balance & Integration LLC


Anthony Kocurek

EB&I purchased the DALT 6900 at the 2016 SMACNA Convention after seeing the demonstrations. We were impressed with the ease of set-up, use, and accuracy of the device and anticipated needing these attributes for some upcoming work. We have since used the machine for those projects and in several other applications where the airflows measured, the accuracy of the reading, and the repeatability of the readings were very important and had to be demonstrated. The DALT 6900 machine worked flawlessly and reliably in all of these situations.

However, in our opinion, the best part of owning and using this machine is the technical support that comes from the Kanomax Team. One of our projects required Kanomax to supply technical data about the machine, and the certification process of the machine, to a degree that is not normally asked for. The Kanomax Team went above and beyond expectations and did this without any hesitation.

I could not be any happier with both the machine and the Kanomax Team.

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