Cool It: Hyundai Testing Innovative Window Film

Matthew Guy
by Matthew Guy

Applying tint to window glass is hardly a new way to keep the cabin of one’s car cool in direct sunlight – but Hyundai claims there remains innovations to explore in the field of beating the summer heat.

According to the company, a new product it is calling Nano Cooling Film can block external heat energy whilst also emitting internal radiant heat to the outside. Through this, the material is said to significantly reduce a car’s interior temps without violating tint laws and maintaining high transparency to allow unobstructed vision. Cops will have to find a different excuse to pull people over for no reason.


Testing is underway in hottest Pakistan, with the product being applied to a total of 70 Hyundai vehicles on the road in that region. Today’s forecasted high in the area was 94F with 46 percent humidity, if you’re wondering. Daily temps in the summertime can reportedly crest 120 degrees Fahrenheit. A proper place in which to test this stuff, then. 


The science behind the functions of Nano Cooling Film is far beyond this author’s pay grade but it apparently maximizes heat dissipation by incorporating a nanostructure that has excellent heat transfer characteristics. The film’s outer layer is said to radiate heat at mid-infrared wavelengths from the interior of the vehicle to the exterior, while the inner two layers reflect incoming heat at near-infrared wavelengths, reducing the total amount of heat that reaches the inside of the vehicle. In other words, if it all works as advertised, the stuff not only prevents heat from entering the car but also assists with getting rid of the stuff. Clever.


Temps are said to have dropped by up to 12 degrees Celsius in some testing conditions but specific ambient temperatures aren't mentioned. As an example including Fahrenheit, a twelve degree plunge from 38C to 26C would be similar to 100F to 79F. That's a big deal.


Evidently, this product is far from a flight of fancy with Hyundai suggesting it is on the cusp of rolling it out to mass production in some markets. 


[Image: Hyundai]


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Matthew Guy
Matthew Guy

Matthew buys, sells, fixes, & races cars. As a human index of auto & auction knowledge, he is fond of making money and offering loud opinions.

More by Matthew Guy

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  • Analoggrotto Analoggrotto on Apr 23, 2024

    Hyundai is the greatest automotive innovator of the modern era, you can take my word for it.

  • Shipwright Shipwright on Apr 23, 2024

    Great news for those down south. But will it remove internal heat to the outside / reduce solar heat during cold winter months making it harder to keep the interior warm.

    • Jeff Jeff on Apr 23, 2024

      Probably would not want this in colder climates but for the Southwest especially the desert this would be good. Don't need solar heat for most of the year in Arizona.


  • Kmars2009 I rented one last fall while visiting Ohio. Not a bad car...but not a great car either. I think it needs a new version. But CUVs are King... unfortunately!
  • Ajla Remember when Cadillac introduced an entirely new V8 and proceeded to install it in only 800 cars before cancelling everything?
  • Bouzouki Cadillac (aka GM!!) made so many mistakes over the past 40 years, right up to today, one could make a MBA course of it. Others have alluded to them, there is not enough room for me to recite them in a flowing, cohesive manner.Cadillac today is literally a tarted-up Chevrolet. They are nice cars, and the "aura" of the Cadillac name still works on several (mostly female) consumers who are not car enthusiasts.The CT4 and CT5 offer superlative ride and handling, and even performance--but, it is wrapped in sheet metal that (at least I think) looks awful, with (still) sub-par interiors. They are niche cars. They are the last gasp of the Alpha platform--which I have been told by people close to it, was meant to be a Pontiac "BMW 3-series". The bankruptcy killed Pontiac, but the Alpha had been mostly engineered, so it was "Cadillac-ized" with the new "edgy" CTS styling.Most Cadillacs sold are crossovers. The most profitable "Cadillac" is the Escalade (note that GM never jack up the name on THAT!).The question posed here is rather irrelevant. NO ONE has "a blank check", because GM (any company or corporation) does not have bottomless resources.Better styling, and superlative "performance" (by that, I mean being among the best in noise, harshness, handling, performance, reliablity, quality) would cost a lot of money.Post-bankruptcy GM actually tried. No one here mentioned GM's effort to do just that: the "Omega" platform, aka CT6.The (horribly misnamed) CT6 was actually a credible Mercedes/Lexus competitor. I'm sure it cost GM a fortune to develop (the platform was unique, not shared with any other car. The top-of-the-line ORIGINAL Blackwing V8 was also unique, expensive, and ultimately...very few were sold. All of this is a LOT of money).I used to know the sales numbers, and my sense was the CT6 sold about HALF the units GM projected. More importantly, it sold about half to two thirds the volume of the S-Class (which cost a lot more in 201x)Many of your fixed cost are predicated on volume. One way to improve your business case (if the right people want to get the Green Light) is to inflate your projected volumes. This lowers the unit cost for seats, mufflers, control arms, etc, and makes the vehicle more profitable--on paper.Suppliers tool up to make the number of parts the carmaker projects. However, if the volume is less than expected, the automaker has to make up the difference.So, unfortunately, not only was the CT6 an expensive car to build, but Cadillac's weak "brand equity" limited how much GM could charge (and these were still pricey cars in 2016-18, a "base" car was ).Other than the name, the "Omega" could have marked the starting point for Cadillac to once again be the standard of the world. Other than the awful name (Fleetwood, Elegante, Paramount, even ParAMOUR would be better), and offering the basest car with a FOUR cylinder turbo on the base car (incredibly moronic!), it was very good car and a CREDIBLE Mercedes S-Class/Lexus LS400 alternative. While I cannot know if the novel aluminum body was worth the cost (very expensive and complex to build), the bragging rights were legit--a LARGE car that was lighter, but had good body rigidity. No surprise, the interior was not the best, but the gap with the big boys was as close as GM has done in the luxury sphere.Mary Barra decided that profits today and tomorrow were more important than gambling on profits in 2025 and later. Having sunk a TON of money, and even done a mid-cycle enhancement, complete with the new Blackwing engine (which copied BMW with the twin turbos nestled in the "V"!), in fall 2018 GM announced it was discontinuing the car, and closing the assembly plant it was built in. (And so you know, building different platforms on the same line is very challenging and considerably less efficient in terms of capital and labor costs than the same platform, or better yet, the same model).So now, GM is anticipating that, as the car market "goes electric" (if you can call it that--more like the Federal Government and EU and even China PUSHING electric cars), they can make electric Cadillacs that are "prestige". The Cadillac Celestique is the opening salvo--$340,000. We will see how it works out.
  • Lynn Joiner Lynn JoinerJust put 2,000 miles on a Chevy Malibu rental from Budget, touring around AZ, UT, CO for a month. Ran fine, no problems at all, little 1.7L 4-cylinder just sipped fuel, and the trunk held our large suitcases easily. Yeah, I hated looking up at all the huge FWD trucks blowing by, but the Malibu easily kept up on the 80 mph Interstate in Utah. I expect a new one would be about a third the cost of the big guys. It won't tow your horse trailer, but it'll get you to the store. Why kill it?
  • Lynn Joiner Just put 2,000 miles on a Chevy Malibu rental from Budget, touring around AZ, UT, CO for a month. Ran fine, no problems at all, little 1.7L 4-cylinder just sipped fuel, and the trunk held our large suitcases easily. Yeah, I hated looking up at all the huge FWD trucks blowing by, but the Malibu easily kept up on the 80 mph Interstate in Utah. I expect a new one would be about a third the cost of the big guys. It won't tow your horse trailer, but it'll get you to the store. Why kill it?
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