[2] At low speeds, opening a window instead is often a better option, though at higher speeds you create air resistance (drag) and waste more energy than you save. At home, using the air conditioner will add plenty to your electricity bill; when physicist Tom Murphy tested his air ...
Be careful, however; setting the temperature too low can result in the unit using more power than you think it's using (based onstar ratinglabel). Older non-inverter units will cycle on and off to maintain the temperature, and you will generally be able to hear and feel it going on an...