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After passing through the packs and turbines, where does the air get into the cabin? On the 737-800, for example. I don't see on the roof any grill to let the air enter the cabin, look: enter image description here

Source: Airliners.net

Where does the air enter the cabin? According this graphic, the air enters through the roof and exits through the wall: enter image description here

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  • $\begingroup$ check the floor, that's where the packs are. $\endgroup$ Mar 12, 2016 at 23:49
  • $\begingroup$ @ratchetfreak You mean the grills on the wall? I asked a question about those and their purpose is cabin air circulation $\endgroup$
    – user13197
    Mar 12, 2016 at 23:55
  • $\begingroup$ "Circulation", ergo where cabin air enters and/or exits $\endgroup$ Mar 13, 2016 at 0:25
  • $\begingroup$ @kepler22b They said it was for pressure balancing between the cargo compartment and the passenger compartment. There are those ceiling nozzles above the seat that the air comes in at the least. $\endgroup$ Mar 13, 2016 at 0:36
  • $\begingroup$ @ratchetfreak I'll put a picture to show that the air enters the cabin on the roof and exits through the grills on the wall :) $\endgroup$
    – user13197
    Mar 13, 2016 at 0:36

1 Answer 1

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It looks to me in your top image that the air vent is right there at the center of the ceiling.

enter image description here

It looks like a linear slot diffuser running the length of the cabin. Similar to this enter image description here

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