Window Tinting Specs: Misconceptions
Some of our customers at Flying Window Tinting oftentimes confuse specifications on window tint films. This is important because as a customer, you must be knowledgeable about the products and services you want to purchase.
Although we help our customers promptly with this issue, we also consider the best interests of our customers by teaching them some of the technicalities they need to know as one of our main responsibilities.
Here is a typical window tint film specification:
- Visible Light Transmission (VLT): 70%
- Infrared Rejection (IRR): 50%
- UV Rejection (UR): 99%
- Total Solar Energy Rejected (TSER): 50%
Now these specifications may be intimidating to some but it’s actually simple principles that can be understood. But before discussing each one of them, it’s important to know first what constitutes sunlight because it’s the governing factor for each one of them.
Sunlight constitutes about 44% visible light, 53% infrared and 3% ultraviolet but it depends on which elevation and part you are in the globe. But this figure is the most accepted value which is based on ground level elevations.
Types of Window Tint Specifications:
- Visible Light Transmission: This metric describes the amount of visible light that is transmitted through the window tint film. So the lower the VLT ratings, the lower amount of visible light is transmitted through. Therefore, the film is darker in shade.
- Infrared Rejection: This metric describes the amount of infrared rays rejected by window tint films measured over the wavelength of 780nm to 2500nm. So the higher the IRR ratings, the higher the amount of infrared rays are rejected. Therefore, the window tint film reduces more heat.
- Ultraviolet Rejection: This metric describes the amount of ultraviolet rays rejected by window tint films measured at all types of UV rays such as UVA and UVB. Most window tint films rejects 99% of UV rays.
- Total Solar Energy Rejected: This metric describes the total amount of solar energy (UV + visible + IRR) that is rejected by the window tint films. Solar energy is the radiant light and heat from the sun. It’s also the combined energy of the three constituents of sunlight. The total amount of solar energy is also the amount of heat generated by sunlight, however, infrared rays contribute the most heat out from the total.
Common Misconceptions of Window Tint Specifications:
1. The window tint I purchased can reject 99% of infrared rays, does it mean that there will be no heat inside my vehicle?
While it’s true that there are window tint films that indeed rejects 99% of infrared rays, it doesn’t mean a total heat rejection to the point where no heat will be felt inside the vehicle. Rejecting 99% of infrared rays would not reject 99% of the heat, but rather 99% of the 53% of infrared rays. The other constituents of sunlight also produces heat; albeit minimal, there are still heat present.
Also, beware of dealers that measure infrared heat rejection ratings of their window tint films. Chances are they’re only measuring a select range of wavelength that will produce the best rating for their window tint films, typically at the range from 900nm to 1100nm.
As an astute customer, you must ask IR ratings that are based on the whole range of infrared spectrum at 780nm to 2500nm. If they don’t provide you one, it’s time to back away. It’s most likely that their IR ratings are only a marketing ploy.
2. So if a window tint film’s TSER rating is high, would that mean that it’s a better performing film?
No, definitely not. Let’s not forget that the TSER rating is the amalgamation of the other three metrics (UV + visible + IRR). For instance, increasing the shade of film decreases its VLT ratings which in turn lowers the TSER rating of the film, but it doesn’t mean that a dark-shaded film is underperforming. In fact, a dark-shaded film is satisfactory because it’s highly reflective.
To make an apple-to-apple comparison, consider comparing window films with the same VLT ratings and determine their TSER rating accordingly. The higher the TSER rating, the more effective the window tint film.
3. I purchased a highly reflective, dark-shaded window tint film, does that mean it rejects heat and UV rays significantly?
Not necessarily, when we say that a film is highly reflective — what it pertains to is its reflective capability only towards visible light. Other constituents of sunlight such as infrared and ultraviolet are not affected.
To determine the effectiveness of a window tint film, you should look at the three metrics (VLT, IRR and UR) specifically to have a ball park estimate of its effectiveness. A better metric to gauge its effectiveness is finding its TSER ratings as discussed above.
Now all of these may seem intimidating and hard to understand because it really does. Save your time learning such terms, instead, call Flying Window Tinting for more information! We are more than willing to help you out and let the professionals do the job for you.
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- 6623 E Colonial Dr, Orlando, FL 32807
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