Mist in cabin??

[Adam.S]

I was recently onboard Jetstar's VH-VGD A320.
This aircraft being only 2 months in service.

While boarding (and for 5 or so minutes after takeoff) there was visible mist/vapour flowing out of the air conditioning outlets(?) located between the overhead compartments and ceiling of the aircraft.

Almost seemed as if there was a 'smoke machine' onboard as the mist was rather dense when it first entered the cabin from out of the air vents.

I am not a regular flyer, however this visible mist is something I have never seen onboard before.


Can anyone explain this vapour?
Is it a standard feature on all recently constructed aircraft?

One theory I had was the warmer outside air mixing with the cooler air flowing out of the air conditioning vents during the boarding process given the front and rear cabin doors were open - resulting in visual condensation?

Just curious.
Thanks
-Adam