Kanomax DAL T6900 Positive/Negative Pressure Duct Leakage Tester

Overview

The Kanomax DAL T6900 Positive/Negative Pressure Duct Leakage Tester is an engineered solution for quantitative airtightness verification of HVAC ductwork systems in compliance with internationally recognized ventilation performance standards. It operates on the principle of controlled pressurization—applying calibrated positive or negative static pressure to sealed duct sections while precisely measuring volumetric airflow required to maintain that pressure differential. This method directly quantifies leakage rate under defined test conditions, enabling objective pass/fail determination per applicable regulatory thresholds. Designed for field use in commercial and institutional building commissioning, the DAL T6900 supports both segment-level validation during installation and whole-system integrity assessment prior to operational handover. Its dual-range flow measurement architecture—comprising a high-capacity matrix array and a low-flow precision nozzle assembly—ensures metrological continuity across duct sizes from small branch runs to large main trunks.

Key Features

• Simultaneous positive and negative pressure testing capability up to ±2500 Pa static pressure, with real-time monitoring of pressure stability, leakage flow, ambient temperature, and barometric pressure
• Dual-mode flow measurement system: matrix-based range (36–640 m³/h) for large-volume ducts and calibrated nozzle mode (4–36 m³/h) for high-resolution low-leakage evaluation
• Integrated 5-inch color LCD touchscreen interface with intuitive menu navigation, graphical trend display, and on-device pass/fail status indication per test sequence
• Onboard data logging for up to 1000 complete test records—including timestamp, pressure setpoint, measured leakage, environmental parameters, and operator ID—supporting traceability and audit readiness
• Rugged portable chassis (72 kg net weight, 54 × 50 × 120 cm footprint) with integrated pressure generator, flow sensors, and control electronics—designed for repeated site deployment without recalibration
• Compliant power configurations: 110–120 V / 220–240 V single-phase inputs, accommodating global electrical infrastructure requirements

Sample Compatibility & Compliance

The DAL T6900 is validated for testing rigid and semi-rigid duct constructions—including galvanized steel, aluminum, fiberglass-reinforced polymer (FRP), and flexible insulated ducts—commonly installed in commercial HVAC applications. It meets functional and procedural requirements specified in EN 1507:2006 (flexible ducts), EN 12237:2002 (rigid circular ducts), Eurovent 2/2 (industrial ventilation), DW/143 (UK ductwork specification), SMACNA HVAC Air Duct Leakage Test Manual, and GB 50243–2002 (Chinese ventilation and air conditioning engineering construction quality acceptance standard). While the instrument itself does not carry formal ISO/IEC 17025 accreditation, its measurement subsystems are traceable to national standards via Kanomax’s internal calibration protocol, and raw data outputs support third-party verification under GLP-aligned documentation practices.

Software & Data Management

Test data are stored internally in non-volatile memory with full metadata tagging (date/time, test mode, duct identifier, technician code). The unit supports USB export of CSV-formatted reports compatible with Excel, MATLAB, and building commissioning databases. No proprietary software installation is required for basic operation; however, optional Kanomax DuctLink PC utility enables batch analysis, comparative reporting across multiple test points, and generation of ASHRAE-compliant summary certificates. Audit trail functionality includes immutable timestamps and sequential record numbering—consistent with documentation expectations under ISO 9001 quality management systems and facility commissioning protocols requiring FDA 21 CFR Part 11–aligned electronic records (when used with validated external software).

Applications

• Pre-commissioning leakage verification of supply, return, and exhaust duct networks in hotels, hospitals, data centers, and educational facilities
• Quality assurance during fabrication and field assembly of SMACNA-classified duct systems (Classes A–D)
• Post-installation validation of fire dampers, volume control dampers, and HVAC terminal units for system-level airtightness
• Energy performance diagnostics—identifying excessive infiltration/exfiltration contributing to fan energy overconsumption and thermal load imbalance
• Third-party commissioning agent verification for LEED EA Prerequisite 1 (Fundamental Commissioning of Building Energy Systems) and BREEAM Hea2 compliance pathways
• Periodic maintenance retesting to assess degradation of sealant integrity, gasket compression, or fastener torque loss over service life

FAQ

What pressure ranges can the DAL T6900 apply during leakage testing?

The instrument delivers stable static pressure control from –2500 Pa to +2500 Pa, with accuracy maintained at ±1% of reading ±1 Pa across the full span.
Does the DAL T6900 require external calibration before each test?

No—factory-calibrated transducers and flow elements retain metrological stability between scheduled annual verifications; zero-point auto-compensation occurs at startup.
Can test results be exported for integration into CMMS or CAFM platforms?

Yes—CSV exports via USB contain all measured and derived parameters in columnar format, enabling direct import into common facility management systems.
Is the DAL T6900 suitable for testing ducts containing fire-rated insulation or acoustic linings?

Yes—provided the lining remains intact and non-perforated during pressurization; the test method evaluates structural envelope integrity, not material permeability.
How does the DAL T6900 handle variable ambient barometric conditions during field testing?

Integrated barometric sensor (70–130 kPa, ±2% accuracy) automatically compensates leakage calculations for local atmospheric pressure, ensuring consistent volumetric reference conditions.