Kanomax DALT6900 Positive/Negative Pressure Duct Leakage Tester

Overview

The Kanomax DALT6900 Positive/Negative Pressure Duct Leakage Tester is a precision-engineered instrument designed for quantitative air leakage assessment of HVAC ductwork systems under controlled pressurization conditions. It operates on the principle of calibrated orifice flow measurement—utilizing interchangeable nozzles and differential pressure transducers—to determine volumetric leakage rates at specified static pressures. The system applies either positive or negative pressure to isolated duct sections or fully assembled systems, enabling compliance verification against internationally recognized airtightness criteria. Its dual-mode capability ensures accurate evaluation of both supply and return air pathways, supporting energy efficiency validation, commissioning protocols, and post-installation quality assurance in commercial and institutional buildings.

Key Features

• Bi-directional pressurization control: Simultaneous testing under positive (+2500 Pa) and negative (–2500 Pa) static pressure conditions, aligned with EN 1507 and SMACNA requirements.
• Multi-range airflow measurement: Integrated nozzle bank (4–36 m³/h) and high-capacity blower (36–640 m³/h) provide seamless coverage across residential, commercial, and large-scale industrial duct configurations.
• Real-time parametric display: Simultaneous on-screen monitoring of leakage volume (m³/h), static pressure (Pa), ambient temperature (°C), and local atmospheric pressure (kPa) with 0.01 m³/h resolution.
• Embedded compliance logic: Pre-programmed pass/fail thresholds per EN 12237:2002 (Class A/B/C), Eurovent 2/2, DW/143, and GB 50243–2002, enabling immediate go/no-go determination without manual calculation.
• Robust field-deployable architecture: Cast-aluminum housing, integrated castor wheels, and modular blower assembly support rapid setup in constrained mechanical rooms or rooftop units.
• Touch-enabled human interface: 4.7-inch color LCD touchscreen with intuitive icon-driven navigation, multilingual menu support (English, Chinese, Spanish), and context-sensitive help prompts.

Sample Compatibility & Compliance

The DALT6900 is validated for use with rigid and semi-rigid duct materials—including galvanized steel, aluminum, fiberglass-reinforced polymer (FRP), and flexible insulated ducts—across rectangular, round, and oval cross-sections up to 2.5 m in equivalent diameter. It accommodates both segmental (section-by-section) and whole-system (fan-powered) testing methodologies as defined in ISO 16813:2021 (HVAC performance commissioning) and ASHRAE Guideline 1–2021. All measurement algorithms adhere to traceable NIST-correlated calibration procedures, and factory-certified transducer linearity meets ANSI Z540.3 requirements. The instrument satisfies documentation prerequisites for LEED v4.1 EA Prerequisite: Minimum Energy Performance and IECC 2021 Section C403.2.1.1 duct leakage verification.

Software & Data Management

Test data—including timestamped pressure curves, leakage vs. pressure plots, operator ID, site metadata, and pass/fail status—are stored locally in non-volatile memory (1000-record capacity). Internal storage supports CSV export via USB 2.0 port for integration with third-party QA/QC platforms (e.g., Autodesk BIM 360, e-Builder). Audit trails record all parameter modifications, test initiations, and result validations—enabling full GLP-compliant traceability. Optional PC-based Kanomax DuctLink™ software provides advanced reporting (PDF/Excel), comparative analysis across multiple test points, and automated generation of ASHRAE-compliant test certificates compliant with ISO/IEC 17025 clause 7.8.2.

Applications

• Commissioning verification of HVAC duct systems prior to occupancy in hospitals, laboratories, data centers, and cleanrooms.
• Periodic maintenance audits of aging infrastructure to quantify degradation-induced leakage and prioritize retrofit investments.
• Third-party certification for building code enforcement (e.g., NYC Mechanical Code §603, California Title 24 Part 6).
• Research-grade quantification of leakage coefficients (C_duct) for computational fluid dynamics (CFD) model validation.
• Training and accreditation programs for TAB (Testing, Adjusting, and Balancing) technicians under AABC or NEBB standards.

FAQ

What standards does the DALT6900 directly support for pass/fail evaluation?
EN 1507:2006 (rectangular ducts), EN 12237:2002 (circular ducts), Eurovent 2/2 (industrial ventilation), DW/143 (UK ductwork specification), SMACNA HVAC Air Duct Leakage Testing Manual, and GB 50243–2002 (Chinese HVAC construction standard).
Can the instrument perform both pressurization and depressurization in a single test sequence?
Yes—it automatically sequences between +2500 Pa and –2500 Pa pressure holds within one test cycle, generating composite leakage curves per ISO 16813 Annex B.
Is external calibration required before each use?
No—built-in zero and span checks are performed at power-on; annual NIST-traceable recalibration is recommended per ISO/IEC 17025 clause 6.6.
Does the DALT6900 meet FDA 21 CFR Part 11 requirements for electronic records?
While not inherently Part 11-compliant, its audit trail functionality and password-protected user roles support implementation within validated environments when paired with Kanomax DuctLink™ and documented SOPs.
What is the maximum duct system volume the DALT6900 can effectively test?
Up to 12,000 m³ for Class C systems (EN 12237), contingent upon achieving stable pressure hold within ±5 Pa over 60 seconds—verified via real-time stability indicator on the touchscreen interface.