Kanomax Model 6705 Air Flow Hood for HVAC Balancing and Ventilation Testing
| Brand | Kanomax |
|---|---|
| Origin | Japan |
| Model | 6705 |
| Air Flow Range | 40–4300 m³/h |
| Accuracy | ±3% of reading ±10 m³/h |
| Operating Temperature | 0–50 °C |
| Operating Humidity | 0–100 %RH |
| Display | 3.5-inch backlit LCD (manually rotatable) |
| Data Storage | 3,000 sets |
| Power Supply | 4 × AA batteries (up to 9 h) or DC 5 V adapter |
| Net Weight | ~3.4 kg |
| Standard Hood Size | 610 × 610 mm |
| Optional Hood Sizes | 305×1220 mm, 500×500 mm, 610×1220 mm, 800×800 mm, 800×1100 mm, 915×610 mm, 915×915 mm, 1220×1220 mm, 1400×800 mm |
| Interface | USB, RS-232, Bluetooth (optional via firmware update or companion app) |
| Additional Features | Real-time clock, battery level indicator, on-device data review/delete, backpressure compensation, transparent viewing window, built-in timer function |
Overview
The Kanomax Model 6705 Air Flow Hood is a precision-engineered instrument designed for quantitative measurement of volumetric air flow from ventilation diffusers, grilles, and registers in commercial, institutional, and industrial HVAC systems. It operates on the principle of integrated velocity-area measurement: an internal array of calibrated sensors—typically thermistor-based or hot-wire anemometric elements—samples airflow across the hood’s cross-sectional area, and the instrument computes volumetric flow (m³/h) using real-time averaging algorithms compliant with ASHRAE Guideline 12–2020 and ISO 16813:2016 for indoor environmental testing. Unlike handheld anemometers, the 6705 eliminates spatial averaging errors by capturing full-face velocity profiles under controlled static pressure conditions, incorporating automatic backpressure compensation to maintain measurement fidelity even when installed against high-resistance outlets. Its rugged, ergonomic design supports single-operator field use, while its modular hood interface enables rapid adaptation to diverse duct geometries without recalibration.
Key Features
- Wide dynamic range: 40–4300 m³/h, covering low-flow terminal devices (e.g., VAV boxes) through high-capacity supply outlets
- Traceable accuracy: ±3% of reading ±10 m³/h, verified per manufacturer’s ISO/IEC 17025-accredited calibration protocol
- 3.5-inch manually rotatable backlit LCD display with intuitive icon-driven menu navigation
- Onboard data logging capacity of 3,000 measurement records, each timestamped with date, time, and user-defined location ID
- Integrated backpressure compensation circuitry ensures stable readings across variable system static pressures (up to ±150 Pa)
- Transparent polycarbonate viewing window allows visual confirmation of grille alignment and airflow uniformity during measurement
- Dual power options: four AA alkaline batteries (typical 9-hour runtime) or external DC 5 V supply for extended lab or commissioning-site operation
- Comprehensive connectivity suite: USB 2.0 for PC synchronization, RS-232 serial output for legacy building management systems (BMS), and optional Bluetooth 4.2 LE for wireless data streaming to iOS/Android companion applications
Sample Compatibility & Compliance
The Model 6705 is compatible with standard rectangular and square HVAC outlet configurations. Its standard 610 × 610 mm hood meets ANSI/ASHRAE Standard 111–2013 requirements for diffuser testing geometry, while optional hood sizes—including 305 × 1220 mm (for linear slot diffusers) and 1220 × 1220 mm (for large ceiling-mounted plenums)—extend applicability across Class A through Class D air distribution systems per EN 13779:2007. All hoods feature sealed gasket interfaces to minimize leakage-induced error (<0.5% volume loss at 250 Pa static differential). The instrument conforms to IEC 61000-4-2 (ESD immunity), IEC 61000-4-3 (radiated RF immunity), and carries CE marking under the EU Electromagnetic Compatibility Directive 2014/30/EU. Calibration certificates are supplied with NIST-traceable reference standards and include uncertainty budgets compliant with ISO/IEC 17025:2017.
Software & Data Management
Kanomax provides the proprietary Kanomax AirFlow Manager desktop software (Windows 10/11 compatible) for post-processing, report generation, and database archiving. The software supports batch export to CSV, PDF, and Excel formats; enables drag-and-drop annotation of test points on floor-plan images; and enforces audit-ready metadata tagging (operator ID, calibration expiry, project number). When used with Bluetooth-enabled firmware (v2.1+), the 6705 supports real-time telemetry streaming for integration into QA/QC dashboards. Data integrity complies with FDA 21 CFR Part 11 requirements for electronic records when configured with user authentication, electronic signatures, and immutable audit trails—making it suitable for GxP-regulated environments such as pharmaceutical cleanrooms and hospital HVAC validation.
Applications
- HVAC system commissioning and TAB (Testing, Adjusting, and Balancing) per NEBB Procedural Standards
- Annual ventilation rate verification in schools, offices, and healthcare facilities per ASHRAE Standard 62.1–2022
- LEED EQ Credit 1 compliance documentation for minimum outdoor air monitoring
- ISO 14644-1 cleanroom airflow uniformity and total supply/exhaust balance audits
- Energy performance diagnostics, including duct leakage estimation via supply-return imbalance analysis
- Post-renovation IAQ verification following ASHRAE Guideline 44–2022
FAQ
Does the Model 6705 require annual recalibration?
Yes. Kanomax recommends annual recalibration against certified flow standards to maintain traceability and ensure continued compliance with ISO/IEC 17025 and ASHRAE 111–2013. Field verification using a reference pitot traverse is advised before critical measurements.
Can the 6705 measure exhaust air flow from fume hoods?
Yes—when equipped with the optional 915 × 915 mm or 1220 × 1220 mm hood and used with appropriate backpressure compensation enabled, it meets ANSI/AIHA Z9.5–2022 fume hood face velocity and total exhaust verification requirements.
Is the device suitable for outdoor or unconditioned attic environments?
It is rated for 0–50 °C and 0–100 %RH operation; however, condensation risk above 95 %RH at low temperatures may affect sensor stability. Use with desiccant-dried air intake or short-duration exposure only.
How does the backpressure compensation function work?
An integrated differential pressure transducer monitors static pressure upstream of the hood’s sensing grid and dynamically adjusts velocity-to-flow conversion coefficients in real time to offset resistance-induced flow contraction effects.
Are firmware updates available for Bluetooth functionality?
Bluetooth capability is hardware-dependent: Models shipped after Q3 2022 include Bluetooth 4.2 LE modules. Earlier units may be upgraded via authorized service centers upon verification of PCB revision compatibility.
