Generally, sunroofs are particularly suitable to be opened during autumn and winter. Here are the relevant details: Best Seasons to Open the Sunroof: When the weather gradually transitions into late autumn and winter. The car interior needs ventilation, but opening the windows feels too cold. At this time, opening the sunroof can quickly expel the stale air from the vehicle. Negative Pressure Ventilation: When driving on the highway, if you want to quickly remove the interior air but the external circulation fan is insufficient, opening the sunroof will naturally freshen the air. This utilizes the negative pressure ventilation method. Rapid Cooling: During the scorching summer heat, prolonged exposure to the sun rapidly increases the interior temperature. Many car owners immediately turn on the air conditioning at maximum fan speed to cool the interior. For cars with a sunroof, driving while using negative pressure to extract the hot air can quickly lower the interior temperature by 3-5 degrees. This method is simple, fast, reduces fuel consumption, and is highly effective—why not use it? Quick Defogging: Summer brings frequent rain, and the high humidity outside after rainfall can cause fogging inside the car while driving. At this time, you can open the sunroof to draw out the hot air inside, easily eliminating the fog. There’s no need to open the side windows, and you won’t have to worry about rain blowing into the car.
