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Apprentice answer

Why can a flat bullnose tee cause air noise and bad balancing readings

3rd YearMeasuring, Layout & Field MathCheck first

Opposing air streams crashing into a flat tee can create turbulence, noise, and static problems. The fix is usually a revised fitting, splitter/divider vane, or smoother Y-style transition approved by layout/detailing.

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Plain-English answer

A bullnose tee can be a problem when two return or supply streams hit each other head-on. The duct may be installed neatly, but the air path is fighting itself.

Check whether the fitting is causing noise, static spike, or bad TAB readings. Bring the foreman/detailer a field sketch and options such as a splitter/divider vane, turning help, or a revised Y/pant-leg style fitting so both air streams enter in a smoother direction.

Ask Foreman

The bullnose tee at [location] has opposing air streams crashing into each other. I checked airflow direction and space. Do you want a splitter/divider vane or a revised transition detail?

Verify before acting

Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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