Meanwhile, have you ever wondered what makes your journey safe and comfortable? Let’s try to find an answer to that through a tiny hole that’s there in the window panes of every aeroplane.

But why would the window panes have the holes?

The tiny hole in every window pane of an aeroplane is a kind of safety feature and is termed as a breather hole which is used to regulate the amount of pressure that passes in-between the window’s inner and outer panes.



The structure of an aeroplane’s window has a role to play in that. The window is made of three panes–outer, middle, and inner. There is a small space called air gap in-between the outer and middle panes, where the two panes along with the gap are accountable for the two-pane-air-gap-design. It is configured to balance the force of atmospheric pressure.

When the aeroplane is hurling at a serious speed, around 35,000 ft above the earth’s surface, the air pressure is 3.4 pounds per square inch, which is comparatively too low for a human to breathe comfortably. Therefore, the air pressure in the cabin is maintained at somewhere around 11 pounds per square inch.  



This breathing hole, as it is often called, helps in regulating the air pressure, hence creating equilibrium between the air in the passenger cabin and the air in-between the middle and outer panes.  In this way, it makes sure that that the full force of the air pressure only hits the outer pane and the middle pane is left for emergencies.

For your pleasurable viewing of the eternal sky, the breather hole also keeps the window free from the fog as its wipes away the moisture between the panes.

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