Should I Leave My Window AC On All Day?
Leaving a window air conditioner on all day can make sense if you are home during hot weather, have a properly sized and well-maintained unit, and can manage the electricity cost. It is usually not the best choice if the house will be empty for many hours, your unit is old or inefficient, or the installation raises safety or security concerns. The right approach depends on occupancy, climate, unit efficiency, and personal comfort needs.