Kanomax DALT6900 Duct Air Leakage Tester

Overview

The Kanomax DALT6900 Duct Air Leakage Tester is a precision-engineered, portable instrumentation system designed for quantitative assessment of air leakage in HVAC ductwork under controlled pressurization conditions. It operates on the principle of calibrated orifice flow measurement—utilizing both matrix and nozzle-based flow elements—to determine volumetric leakage rates at specified static pressure differentials. The instrument conforms to internationally recognized duct airtightness standards including EN 1507:2006 (flexible rectangular ducts), EN 12237:2002 (rigid circular ducts), Eurovent 2/2, DW/143, SMACNA HVAC Air Duct Leakage Test Manual, and GB 50243–2002 (Chinese national standard for ventilation and air conditioning engineering). Its dual-range flow architecture enables high-resolution measurement across low-leakage (e.g., Class A/B duct systems) and high-leakage scenarios (e.g., unsealed industrial plenums), supporting both positive and negative pressure testing protocols required by commissioning and energy code compliance workflows.

Key Features

• Integrated dual-sensor flow measurement: Matrix flow element (36–640 m³/h) and precision nozzle assembly (4–36 m³/h) for extended dynamic range and improved low-flow sensitivity
• Real-time simultaneous display of leakage volume (m³/h), static pressure (Pa), ambient temperature (°C), and barometric pressure (kPa) on a 5-inch full-color LCD touchscreen interface
• High-stability pressure regulation with closed-loop feedback control, maintaining setpoint accuracy within ±1 Pa during sustained tests up to ±2500 Pa differential
• Onboard data logging capability storing up to 1000 complete test records—including timestamp, test configuration, measured parameters, pass/fail status per selected standard—and supporting export via USB interface
• Ruggedized mechanical design optimized for field deployment: aluminum alloy frame, shock-absorbing casters, modular hose connections, and IP54-rated enclosure for dust and splash resistance
• Compliance-ready operation with configurable test templates aligned to EN, SMACNA, and GB standard clauses—enabling automated pass/fail evaluation based on duct class, size, and pressure criteria

Sample Compatibility & Compliance

The DALT6900 is validated for use with rigid (galvanized steel, stainless steel, aluminum) and semi-rigid (fiberglass-reinforced polymer, flexible aluminum foil) duct constructions typical in commercial, institutional, and industrial HVAC installations. It supports testing of individual duct sections (e.g., after fabrication but before insulation), branch assemblies, and fully integrated systems—including air handling units, fire dampers, volume control dampers, and terminal devices—provided appropriate sealing and pressure connection points are available. All measurement algorithms and calibration traceability align with ISO/IEC 17025-accredited procedures. The device meets electromagnetic compatibility requirements per EN 61326-1 and safety standards per EN 61010-1. Its test reports satisfy documentation requirements for LEED EA Credit 1 (Optimize Energy Performance), ASHRAE Guideline 0–2019 (Commissioning Process), and ISO 16813:2006 (HVAC design principles).

Software & Data Management

The DALT6900 embeds firmware v3.2+ with built-in test sequencing logic, eliminating external PC dependency for routine field verification. Data files are stored in CSV-compatible format with embedded metadata (test ID, operator ID, location tag, standard reference, duct classification). USB mass storage mode allows direct transfer to Windows/macOS systems for integration into CxP (Commissioning Process) databases or BIM-linked QA/QC dashboards. Optional Kanomax DALT-Link software (Windows only) provides advanced functions: multi-test statistical trending, PDF report generation with digital signature fields, comparison against historical baselines, and audit trail export compliant with ISO 9001:2015 clause 7.5.3 (Control of documented information). While not FDA 21 CFR Part 11-certified (as it is non-clinical), its timestamped, non-erasable log entries support GLP-aligned quality audits when deployed in certified laboratories or third-party commissioning firms.

Applications

• Pre-commissioning validation of duct airtightness in new construction projects (hotels, hospitals, data centers, airports)
• Post-retrofit verification following duct sealing interventions under DOE’s Building Technologies Office guidelines
• Periodic maintenance testing to quantify degradation in aging HVAC infrastructure
• Third-party certification for green building rating systems (LEED, BREEAM, Green Star)
• Contractual acceptance testing per MEP subcontractor specifications referencing SMACNA or EN standards
• Research applications in building physics labs evaluating duct material permeability and joint integrity under cyclic thermal loading

FAQ

What duct classes can the DALT6900 verify according to EN 1507?
It supports Class A (tightest), B, and C duct classifications across rectangular and circular configurations, with automatic calculation of allowable leakage thresholds based on measured surface area and applied pressure.
Does the instrument require annual recalibration?
Yes—Kanomax recommends traceable recalibration every 12 months at an ISO/IEC 17025-accredited facility using NIST-traceable pressure and flow standards; factory calibration certificates include uncertainty budgets per ISO/IEC 17025 Annex A.
Can it test ducts under negative pressure only?
No—it performs bidirectional testing: both positive-pressure (supply side) and negative-pressure (return/exhaust side) modes are selectable via the touchscreen interface.
Is external power required during field operation?
Yes—the unit must be connected to a stable AC source matching its configured voltage variant (110–120 V or 220–240 V); no internal battery is provided due to sustained high-power fan and pressure-control demands.
How is leak location identified when failure occurs?
The DALT6900 quantifies total system leakage only; localized fault detection requires complementary tools such as smoke generators, ultrasonic leak detectors (e.g., Kanomax 3886), or infrared thermography during pressurized testing.