Originally Posted by
compressor stall
One thing that Airbus’s cabin airflow studies recommend - and I have yet to see on 4 airlines I have paxed on in the last few months (including QF) - is closing the overhead air vents prior to pax boarding.
My experience as SLF in Europe pre-Covid (I haven't flown since March) was that all overhead air vents were routinely closed before boarding, presumably by the cleaners. I noticed that because I always wanted them open! YMMV wherever you are.