AC might be comparatively more efficient at cooling the room 1 degree rather than 5, that doesn't mean that keeping that temperature for 8 hours will consume le

AC might be comparatively more efficient at cooling the room 1 degree rather than 5, that doesn't mean that keeping that temperature for 8 hours will consume less energy than cooling it once you come back in. If it were really overall more efficient it would be cheaper for the hotel owner to just keep it on all the time, but clearly it's not.