What are these grills ongrilles in the passenger cabin of this 787?

Below the windows, ahead of the seat, there are small grillsgrilles. Look:
^{Source: Airliners.net}

What are those for?

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occurred Mar 12, 2016 at 9:59

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edited Mar 11, 2016 at 12:55

Below the windows, ahead of the seat, there are small grills. Look:
^{Source: Airliners.net}

Source: Airliners.net
WhatWhat are those for?

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asked Mar 11, 2016 at 2:43

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