Does it waste energy to have air-conditioning on in my car?



  1. 0 Votes

    Yes. Using air conditioning while driving is said to decrease gas mileage by as much as 20 percent. When you first get into a hot car, roll down the windows and let it cool for a few moments. It’s also better to drive with the windows only partially opened, as driving with them fully open can increase drag on the car and also have a negative effect on your car’s MPG. You can also use the car’s flow-through ventilation system, since AC systems contain (and sometimes leaks) CFCs – compounds mainly responsible for ozone layer depletion.

  2. 0 Votes

    Running your air-conditioning in your car can increase your fuel consumption by 10% at low speeds, but at higher speeds the increase in consumption is negligable. Driving with your windows open increases the drag on your vehicle, also decreasing fuel efficiency. So, at low speeds it is better to have your windows open and only use the air-conditioning at higher speeds; or better yet, use the air vent to circulate cool air that was brought into the car at lower speeds through open windows.

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