Should Car Sunshades Be Placed Inside or Outside?
2 Answers
Car sunshades should be placed outside because when installed inside the vehicle, sunlight penetrates the glass and enters the cabin. The aluminum foil reflects the sunlight, but the glass then reflects it back into the car. The sunshade's insulation layer absorbs some of the heat, effectively trapping it inside the vehicle and heating the air, only blocking light but not heat. The benefits of using a car sunshade include: 1. Reducing interior temperature: The aluminum foil reflects light, thereby reducing thermal radiation and having low thermal conductivity. When sunlight hits the sunshade, some of the heat is blocked, and UV rays are reflected away by the foil; 2. Protecting dashboard equipment: Direct sunlight can raise the interior temperature to around 70 degrees Celsius, which not only causes the dashboard shell to warp but also damages instruments and audio equipment due to high temperatures, such as component aging or solder joint failure. Sunshades effectively prevent direct sunlight; 3. Reducing interior pollution: The dashboard and interior items in a car are typically made of plastic. Prolonged exposure to high temperatures can cause them to release harmful substances, affecting human health.
I think car sunshades are generally more suitable to be placed inside the car. Every time I drive out and park, I habitually place the sunshade on the windshield inside the car. It's simple and convenient—easy to install when getting in and effortless to remove when exiting. If placed outside, it can easily be blown away by the wind or taken by someone, especially when parking in public places, adding an extra layer of risk. Additionally, placing the sunshade inside works quite well—it blocks UV rays, protects the dashboard and seats from sun damage, and helps cool the car faster in summer, saving fuel by reducing the need for air conditioning. I've tried placing sunshades outside before, and the effect was similar, but much more troublesome. By the way, choosing a high-quality suction cup sunshade is more important—don’t go for cheap ones that easily fall off, as they could obstruct your view while driving, which is dangerous. Also, remember to clean your windshield regularly to maintain strong suction and ensure a smoother overall driving experience.
