The left and right of the Lower Dimming Panels are the ‘vents’ or vents (tubes). These ventilation openings can for example also be found above the passenger seat in a bus or airliner.

It is used for cooling and ventilation.

The ‘vents’ that I've made (Tip Henk Timmermans) are fake and can later be connected to a ventilation system.

More info on page Hardware/MIP-Lower panels.

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