Can the Trunk Vent Be Blocked?
2 Answers
It is best not to block the trunk vent. Here are the specific functions of the trunk vent: 1. Pressure relief: When forcefully and quickly closing the door or trunk, air is forced into the car. If the interior space is completely sealed, this closing action will increase the air pressure inside, making it difficult to close the door or even preventing it from sealing properly. With a vent, when the interior pressure rises, the vent opens to release the pressure. 2. Air circulation: When driving with the windows closed and the air conditioning on, if the air conditioning is set to external circulation, outside air is continuously drawn into the car. Without this vent, the air pressure inside the car would keep increasing, eventually preventing outside air from entering the car.
Last time my dog knocked over dog food in the trunk, the vent was half blocked. As a result, on rainy days the windows were completely fogged up and I couldn’t see the road at all. This thing is actually a balance vent for air exchange between the inside and outside of the car. If it’s completely blocked, not only will it cause fogging, but your ears will also feel painful when closing the door. Some older cars even have their AC airflow reduced by half because the vents are completely blocked. When modifying the audio system, never cover it with soundproofing cotton. If you really need to block it temporarily, choose a breathable material. I remember once a clump of leaves got washed into it during a car wash, and the trunk always had a muddy smell. After searching for a long time, I found it was due to fermented debris in the vent—you really can’t underestimate these two small grids.
