Apprentice question
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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.
['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.']