The small hole you see in some airplane windows is called a “breather hole” or “bleed hole.” It serves a specific purpose in regulating the pressure between the two panes of the window. The outer pane of an aircraft window is exposed to lower pressure at high altitudes, while the inner pane is pressurized to cabin pressure. The breather hole allows the pressure to equalize between the two panes, preventing the inner pane from breaking due to the pressure difference. It also helps to prevent fogging or condensation between the panes.
Gareth Edwards
Gareth is one of the founders and owners of final approach. Gareth covers many of the airports across the North west including Manchester, Liverpool & Hawarden. Gareth is the main designer of the website.
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