My 992 will (finally) be arriving soon. One of my concerns is the heat that comes in from side windows. I have a 22 Cayman S and the heat that comes in from the side windows is pretty extreme.

• Does the 992 come with any factory tinting/dye to reduce UV? I'm specifically wondering if it's any better than the Cayman.
• If not, what tinting have people gotten that DOESN'T change the appearance of the car?

 

No UV Blocking, even on the windshield, which is actually surprising.

 

It certainly doesn’t feel like it. tint is a must

 

All windshields block over 90% of UV, side windows are just lightly tinted glass (minimal heat and about 50% UV blocking), curious if better UV blocking is a feature of the "lightweight glass" which is thinner glass plus a plastic layer.
There are a variety of nearly clear tint materials available that will do what you want!

 

UV doesn’t heat up the car, infrared does.

As noted, the laminated windshield blocks almost all UV, but the monolithic side windows are probably 60-90% effective. UV degrades plastic, leather and humans.

To block heat, you either need a dark tint to lower total transmission, or a lighter (virtually clear) metallic based coating or film the reduces emissvity and thus IR radiation to the interior.

 

The windows in the 992 definitely block a good amount of UV and heat. I abhor tint and would never defile any of my cars that way but I can tell you that there is WAY more solar heating in my older cars (993 and F355) than any modern car, including the 992.

 

I can confirm both the windshield and side windows block 100% of UV based on an experiment I conducted with a Solarmeter UV Index Meter. The meter was directly facing the sun in each of the readings. The readings behind the side windows and windshield measured 0.0, while the reading with the side window down measured 7.1

 

Interesting, how did you come to that conclusion?

 

Dang. Actual data? Brilliant. This is why I love Rennlist. Thanks!

So it looks like the only concern I have to consider would be from heat via infrared.

 

I'd be curious as to what frequency or frequency range the meter you are using measures. UVA, UVB and/or UVC?
One method of "testing" sunglasses for UV protection is to shine a black light through them aimed at any of the more recent U.S. paper currency. To make counterfeiting paper currency more difficult the U.S. Mint has been placing a stripe on paper currency that illuminates quite well when exposed predominantly to UV light. See the images below.
Unfortunately, when I shine a black light though any of the windows (front, side or rear) on my 2021 992 with the quiet/light weight glass option, this stripe lights up almost as well as if the glass were not there at all.


Natural Sunlight
.

Exposed to UV Light
.

UV Blocking Sunglasses.
.

Not UV Blocking Sunglasses
.

UV and Visible Light Spectrum

 

Now. I'm confused. Who is correct?

 

No doubt, both are. It's just a matter of what frequency of UV light the meter he's using is sensitive to.
A Black Light, such as I use, produces a 365-370nm wavelength. This pretty much covers the middle/right side of the UVA and UVB spectrum (280-400nm),

The following is a part of a presentation I put together some years ago:

The sun emits 3 types of UV waves - UVA, UVB and UVC. Both UVA and UVB make it through to the earth’s surface. UVC (the most dangerous) on the other hand is mostly absorbed by the earth's atmosphere.
95% of UV radiation that makes it to the earth is UVA (this is also what is used in tanning beds). The other 5% is UVB (which is what causes most sunburns). Both types of radiation have been found to cause damage if directly exposed to our eyes.
This is the reason most experts will tell you to look for sunglasses that block 100% of UVA and UVB rays. Or what are often sold as "UV 400" Sunglasses.

 

I found a performance curve for his SolarMeter Model 6.5. (Google is my friend.)
What this graph shows is that this meter is measuring UVC and the low end of UVB but does not respond to UVA.
.

 

Just get ceramic tint, 55% to 70% won't change the appearance.

 

This is the model I used. Apparently its range is 280-400nm, which includes both UVA & UVB, and determines how likely you are to get a sunburn based on its readings. Also, the glass on my 992 Turbo S is the Standard Glass, not the Lightweight Glass spec, which perhaps would not have the same UV blocking capability.

While UVA and UVB rays are transmitted through the atmosphere, all UVC and some UVB rays are absorbed by the Earth's ozone layer. So, most of the UV rays you come in contact with are UVA with a small amount of UVB (Per google FDA.Gov)


https://www.solarmeter.com/product/model65/