Overview

Ensure unparalleled accuracy in your HVAC system balancing and commissioning tasks with the Testo 420 Replacement Hood. Expertly crafted to a precise 915 x 915 mm, this hood seamlessly integrates with your existing Testo 420 Volume Flow Hood base unit, guaranteeing consistent and reliable air flow measurements across standard square diffusers and grilles.

Designed for professional technicians, this high-quality hood features an essential integrated flow straightener. This crucial component effectively tames turbulent air, providing the stable conditions necessary for the Testo 420's measurement sensors to deliver highly precise and repeatable readings, even in challenging installation environments.

Why It Matters

Accurate volumetric flow measurements are fundamental for efficient HVAC system operation, occupant comfort, and energy conservation. This replacement hood ensures that your Testo 420 continues to provide the verifiable data needed for compliance, system optimization, and effective troubleshooting, making it an indispensable tool for any serious air balancer or commissioning engineer.

What's Included

• ✓ 1 x Replacement hood for Testo 420 (915 x 915 mm)
• ✓ 1 x Convenient carrying bag (Product no. 0554 4203)

Features & Benefits

• Standardized Fit: The 915 x 915 mm dimensions provide a perfect match for common square ceiling diffusers and grilles, simplifying setup.
• Integrated Precision: A built-in flow straightener ensures that turbulent supply or exhaust air is smoothed out for consistently accurate readings.
• Quick & Secure Attachment: Designed for seamless and rapid attachment to your existing Testo 420 measurement base, reducing valuable on-site downtime.
• Durable & Reliable Construction: Manufactured with high-grade, resilient materials to withstand demanding commercial environments and repeated use.
• Enhanced Portability: Includes a dedicated carrying bag for easy transport and protection of your hood between job sites.

Applications

• ✓ Volumetric flow balancing on square ceiling diffusers in commercial buildings.
• ✓ HVAC commissioning and system optimization in offices, hospitals, and retail spaces.
• ✓ Troubleshooting uneven air distribution without needing to remove or tape off grilles.
• ✓ Ensuring compliance with air quality and ventilation standards.

Tradie Pro Tip

Tradie Pro Tip: Airflow across a square diffuser is rarely perfectly laminar, especially when the duct connection is offset. The flow straightener inside this hood is your best friend—it acts as an equalizer to ensure your Testo 420 base reads the average volume correctly, regardless of how messy the air coming out of the ceiling actually is.

Pair With

To maximize the utility of your Testo 420 Volume Flow Hood system, consider pairing this replacement hood with the Testo 420 Base Unit for complete functionality. For advanced diagnostics or spot-checking, explore our range of Testo Smart Probes. Regular calibration with our HVAC Shop Calibration Services will also ensure your instrument maintains peak performance and measurement accuracy for years to come.

Keep Your Space Clean & Optimized

Ensure your HVAC systems operate at their best with precise and reliable airflow measurements. Invest in the Testo 420 Replacement Hood to maintain the integrity and accuracy of your volume flow instrument, guaranteeing optimal air balance and energy efficiency. Trust HVAC Shop for all your professional measurement needs.

Technical Data