Originally Posted by
johnso29
IDK, but it burns my britches when I walk on a 319/320 that has good external power hooked up, and the APU is still running.
Shut down the freaking APU!! Quit burning fuel!!!! ARGHHHHHHH!!!!!

Maybe because the external air wasn't hooked up? They are usually quick to hoop up power, but not air north of the MDL.
I've noticed that there seems to be a marked difference in cultures between keeping the cabin cool for pax boarding/unboarding, and that our brothers from the lower latitudes seems to have less of an issue with having no air and cabin temps into the 80's. Comfortable pax are happy pax.....