Why is it not recommended to install rain guards?

[MacJudah]

It is necessary as rain guards can effectively prevent rainwater or strong winds from directly entering the vehicle, improving ventilation efficiency. When driving in the rain, opening the window can also prevent window fogging. It is advisable to install them in rainy areas. Below are the relevant details: 1. Function of rain guards: They maintain fresh air circulation in any environmental condition, ensuring the interior remains comfortable for occupants. By keeping fresh air flowing, they prevent window fogging under any circumstances, enhancing driving safety by maintaining clear visibility and operation. 2. Quality of rain guards: The quality of rain guards mainly depends on two aspects. First, the material—some are made of plastic, while others use synthetic resin. Resin offers better thickness and flexibility. Second, the adhesive used for installation—some domestic adhesives may not hold firmly or seal tightly, allowing rainwater to seep through during heavy rain. As for wind noise, there is little difference before and after installation.