How to Open Car Windows for Maximum Coolness?
3 Answers
Opening diagonally opposite windows not only reduces wind noise but also improves air circulation. Opening a narrow gap in one front window helps smoke dissipate quickly. Closing only one front window facilitates rapid ventilation to remove odors from the car.
I always think about how to open the windows for the coolest effect while driving. Physically, the best way is to open diagonal windows, such as opening the front left window one-third and the right rear window one-third, creating air convection where hot air is extracted and cool air rushes in. The optimal speed for this is between 50 to 60 kilometers per hour, as the convection cycle works best for quick cooling. Opening the windows too much or too little is ineffective, causing more wind noise and higher fuel consumption. Opening windows in the morning or evening works even better, saving at least 10% fuel compared to using air conditioning. However, it’s better to close the windows on highways or in dusty conditions. Keeping the window edges clean is also important, as debris can block airflow. Personally, I find this method simple and effective, and listening to the wind is relaxing, making it especially suitable for urban commuting.
As a young person, I enjoy driving around to find ways to stay cool. I tried rolling down all the windows, but the wind was too strong and uncomfortable. Then I switched to opening one front window and the rear window diagonally opposite, each halfway, which creates super-fast airflow and instantly cools down the car. Maintaining a speed of around 40 km/h works best—too fast and the wind noise is loud, too slow and it’s ineffective. Avoid opening windows in congested areas, as the exhaust fumes make it even hotter. This method also helps extend the car battery’s lifespan during daily drives, and using the AC at the lowest setting as a supplement works even better. On weekend trips, I first crack the window halfway to let out hot air before opening the diagonal windows for a cool start. It feels both cost-effective and eco-friendly, and the breeze makes the drive much more enjoyable.
