Originally Posted by
dcutcher
keeping the cabin cooler costs LESS than keeping it warmer, no? Or is there so little difference that cost is not really a factor (though I had originally understood it was.)
The inflight cabin temperature has no bearing on fuel economy, since the same amount of air will be bled off of the respective engine compressor stages regardless of temperature modulation.
When the FA calls and tells us it's too warm or too cold, we change the temperature. The problem is that while one passenger is complaining that it's too cold, there's another one who's complaining it's too hot. This is axiomatic in the world of aviation.