testo 420 - Air Flow Hood

The Testo 420 Air Flow Hood is a professional volume flow capture hood designed for fast and accurate air balancing on HVAC systems. Built for commissioning, testing and adjusting ventilation systems, the Testo 420 measures air volume flow at supply and return outlets, making it ideal for commercial air conditioning, ventilation and indoor air quality work.

With a lightweight 2.9 kg design, integrated flow straightener and tiltable/removable display, the Testo 420 is easy to use above head height and on larger balancing jobs. Bluetooth connectivity allows technicians to monitor readings and create reports through the Testo Smart App, helping streamline onsite documentation and handover. The standard hood size is 610 × 610 mm / 24" × 24".

Key Features

• Professional air flow capture hood for HVAC balancing
• Measures volume flow at supply and return air outlets
• Integrated flow straightener improves accuracy at swirl outlets
• Lightweight design at approx. 2.9 kg
• Standard 610 × 610 mm / 24" × 24" hood size
• Tiltable and removable measuring instrument/display
• Bluetooth connectivity with Testo app support
• Onsite reporting and measurement documentation
• Suitable for measuring volume flow, temperature and humidity
• Soft case with telescoping handle and wheels included
• Ideal for commercial HVAC commissioning and ventilation balancing

Specifications

Kit Includes

• 1 × Testo 420 measuring instrument / air flow hood base with Bluetooth
• 1 × 610 × 610 mm / 24" × 24" capture hood
• 1 × Integrated flow straightener
• 5 × Tension rods
• 1 × USB cable
• Batteries
• 1 × Soft transport case with telescoping handle and wheels

Applications

• HVAC air balancing
• Supply and return air volume measurement
• Ventilation system commissioning
• Commercial air conditioning testing
• Air outlet and diffuser measurement
• Indoor air quality and comfort checks
• Filter and pressure checks when used as a measuring instrument
• TAB work in offices, hospitals, schools and commercial buildings

The Testo 420 Air Flow Hood — 0563 4200 gives HVAC technicians a lightweight, accurate and efficient solution for air volume flow measurement. With Bluetooth reporting, a flow straightener for improved outlet accuracy and a wheeled transport case, it is a strong choice for professional HVAC commissioning and balancing work.