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Why There’s a Tiny Hole in Your Airplane Window and Why You Should Be Glad It’s There

  • The tiny hole in airplane windows is known as a 'breather hole' or 'bleed hole' and allows pressure to equalize between the cabin and the center pane.
  • The breather hole prevents condensation from forming between the layers, which could otherwise fog or freeze the window.
  • The breather hole is not a design flaw; it is an engineered solution to high-altitude flight issues.
  • By equalizing pressure, the breather hole reduces the strain on the window system, decreasing the risk of damage or structural failure.
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Why There’s a Tiny Hole in Your Airplane Window and Why You Should Be Glad It’s There

You’re buckled in, tray table up, ready for takeoff, when you glance out the window and spot something strange: a tiny hole in the glass. Cue the panic. Is the window broken? You’re not alone. A recent TikTok video showcasing…

During a flight, you may have already wondered about what happens to the passengers' dejections, why you are asked to keep the Hublot caches open during take-off and landing, the 100 ml rule, or the shape of the portholes. We have already responded to all three [...]

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SciencePost broke the news in on Wednesday, July 23, 2025.
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