That may not seem like much, but a 25% reduction in heat and the elimination of direct sun exposure to soft-touch plastics is significant. A good car sun cover or shade can reduce cabin and dashboard temperatures by about 8% to 25%. Black sunshades for car windows will absorb more infrared (heat) and trap it in the vehicle, while something like a metallic or reflective sunshade will bounce more infrared and visible light away. These cheap accessories – you can usually buy OEM car sun screens for under $100 – absorb or even reflect the visible light, depending on the auto sunshade material and color. Infrared light cannot escape through the glass, and that causes the cabin to heat up.Įnter: Car sun shields. Without shade, visible light from the sun passes through the windows and is absorbed by whatever it touches. The sun radiates energy within the electromagnetic spectrum, primarily short-wave energy like infrared (heat) and ultraviolet radiation. Now, what happens when you have car window shades or car sun visors installed? Cloth seats can fade, and leather will almost certainly crack over time. Plastic can soften and even melt (they can also emit benzene, a harmful chemical that's been linked to anemia and poor immune systems). Steering wheels begin to delaminate and peel. Interior car components, particularly dark plastic, dashboards, seats and upholstery, take on significant thermal stress when exposed to direct sunlight, humidity and ambient temperatures above 140☏. What does exposure to excessive sun and heat do to a car? After just 10 minutes of being exposed to humid, 140-degree heat, the human body will succumb to hyperthermia, heatstroke and, ultimately, acute organ failure and death. Within 90 minutes, a parked car can actually cook a lamb loin. According to researchers, cabin and dashboard temperatures can rise to well over 140☏ and 200☏, respectively, after 60 minutes in the sun. When parked, unshaded, cars get absolutely blasted by the sun. Summer in Miami – does life get any better? If you are a BMW, you might think summer in Miami is Hell on Earth.
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