TSI’s Alnor® EBT731 Balometer® Capture Hood isn’t just another airflow hood—it’s a smart tool that adapts to how you actually work.

 

SPEED	ACCURACY	SIMPLICITY
Set up in seconds. Verify airflow in minutes to stay on schedule.	Auto-zeroing sensor to reduce user steps	Touchscreen, wireless design for easy data capture and export.

 

 

 

4 Professional Air Balancing Tips using the Alnor® EBT731 Balometer® Capture Hood 

Whether you’re supporting a mechanical contractor, running service calls in commercial buildings, or following strict specs on international TAB projects—getting airflow right is non-negotiable. TSI’s Alnor® EBT731 Balometer® Capture Hood isn’t just a hood, it’s a full diagnostic tool designed to help pros like you get accurate results fast. 

 

1. Don’t Just Trust the Outlet—Check the System

Readings at the diffuser don’t always tell the whole story. Duct leakage, ineffective controls, bad zoning, or upstream restrictions can skew your numbers.


Pro Tip: Start with a duct traverse. The TSI’s Alnor® EBT731 Balometer® Capture Hood’s built-in micromanometer, paired with a pitot tube or airflow probe, gives you the upstream data you need. Once the system checks out, move to the outlets with the capture hood.

Need to confirm the duct is tight before you balance? TSI’s PANDA (Positive and Negative Accreditation) System helps you pressure test and verify industry standards—so you're not trying to fix problems that should’ve been handled before you show up.

 

2. Good Gear Means Good Readings

Reading-to-reading error margins can add up, especially when small inaccuracies occur across multiple diffusers. You can’t balance a system with a capture hood that’s off by 5–10%. Let’s just say, you get what you pay for.

TSI’s Alnor® EBT731 Balometer® Capture Hood Advantage:

• NIST-Traceable Calibration
• ±2% pressure accuracy (+ offset)
• ±3% velocity accuracy (+ offset)
• Auto-zeroing sensor to reduce user steps

Ideal airflow readings for the system are within ±10% of design airflow. With specifications well below this threshold, TSI’s Alnor® EBT731 Balometer® Capture Hood delivers the accuracy that serious work demands—no guesswork. Ensuring the variation comes from the system design, and not your instrument.
 

3. Measure VAV Boxes Like a Pro

VAV (variable air volume) systems dominate commercial spaces—but measuring airflow at minimum settings isn’t always straightforward. Low flow, low turbulence, and diffuser effects can lead to junk data.

How to Nail It with TSI’s Alnor® EBT731 Balometer® Capture Hood:

• Use Consistent Technique for Repeatability. Keep the hood centered and seated squarely on the diffuser with an even seal. Variations in hood position (especially on swirl diffusers) can cause large swings in readings.
• Take advantage of low-flow accuracy and the EBT731’s built-in backpressure compensation to adjust for resistance introduced by the hood itself—further improving accuracy across flow ranges.
• Use manufacturer’s diffuser correction factors—but only if you have them for all installed diffusers. Applying published corrections selectively can skew your results by advantaging or disadvantaging certain zones. Also, be cautious with software that applies automatic corrections—new diffuser models often outpace updates, which can introduce errors.
• When in doubt, and as possible, traverse the duct. A downstream duct traverse using the included Alnor® Micromanometer EBT730 with a pitot tube or thermal anemometer offers a reliable way to validate readings—especially at low flows or when diffuser effects create measurement uncertainty.

4. Size, Stability & Setup: Why Capture Hood Fit Matters

Ever had a capture hood collapse mid-read or leak air out the sides? Some hoods are too flimsy or oversized, which means bad seals, unstable readings, and do-overs.

TSI’s Alnor® EBT731 Balometer® Capture Hood Gets It Right:

• Multiple hood sizes to match your outlets.
• Strong frame with reinforced but flexible hood support poles, sturdy without being bulky.
• Quick to set up, easy to break down.

The wrong hood size can throw you off by 20% or more. The right fit makes all the difference.

 

TSI’s Alnor® EBT731 Balometer® Capture Hood: Built for the Real World

This isn’t just another airflow hood—it’s a smart tool that adapts to how you actually work. With built-in diagnostics, versatile accessories, and rugged reliability, TSI’s Alnor® EBT731 Balometer® Capture Hood helps you:

• Nail airflow readings, at the box, the diffuser, or mid-system.
• Cut time on-site with fast setup.
• Trust your data and avoid rework.
• Adapt to each job with interchangeable hoods, probes, and micromanometer options.
   

When accuracy matters and conditions aren’t perfect, you can always count on blue.

 

 

Discover how the TSI Alnor® EBT731 Capture Hood can elevate your balancing workflow.

Request a Quote or Schedule a Demo Today!