Don't shoot me down for this as it is just an observation.....on BA
747/767/777 there are no vents fitted. When the cabin gets over warm on the ground and on the 747 fleet that is very often, it is noted by myself and my colleagues that the PAX who get upset and ''NEED AIR'' are normally of US or Canadian nationality....it borders on obsessive at times. They are the ones that ''have '' to get off, ''need'' to take another plane. The other 250 or so just seem to either cope or grin and bear it.
As I said this is not a dig at certain nationalities, just a regular occurrence.
I wonder if it stems form the normality of having AC
at home and in the workplace in the US and Canada, those of us in Europe just suffer the heat without AC
in the main and know no difference.
On a personal note I prefer planes fitted with the vents, it gives PAX one element of control, control being the thing we are robbed of when we fly.