Panoramic roof is not IRR.

Scarpia

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The National Glass Association is the largest trade association for the auto glass, architectural glass, and window and door markets. The NGA was founded in 1948, and currently has close to 3,000 member companies. This international association represents the interests of companies worldwide.
Founded: 1948
Are you in Australia? Your signature says you are in California.
If it was the IGA (International Glass Association), this might be more relevant.
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timbop

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The National Glass Association is the largest trade association for the auto glass, architectural glass, and window and door markets. The NGA was founded in 1948, and currently has close to 3,000 member companies. This international association represents the interests of companies worldwide.
Founded: 1948
Avogadro's number is 6.02 x 1023
 

ChasingCoral

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ChasingCoral

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The National Glass Association is the largest trade association for the auto glass, architectural glass, and window and door markets. The NGA was founded in 1948, and currently has close to 3,000 member companies. This international association represents the interests of companies worldwide.
Founded: 1948
What does this have to do with the NAGS link you provided. Unlike the National Glass Association,
Ford Mustang Mach-E Panoramic roof is not IRR. Screen Shot 2021-05-10 at 10.48.08 AM


Do you even read this questionable material before you post it?
 


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TheVirtualTim

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If someone could check the roof with a UV meter..... It would be nice to know.
UV is the opposite side of the visible spectrum from IR. The roof wont transmit much (if any) UV ... even without any coatings.

Plain ordinary glass blocks 100% of UVB and about 25% of UVA. That's not because of coatings ... it's just a property of glass (but it does need to be "glass" and not just something glass-like). But laminated glass does block about 99.9% of all UV radiation.

Also fun fact... green colored glass (such as those emerald green beer or wine bottles) also blocks all UV (blue colored glass does not).

I wold expect a UV meter to read pretty much nothing through that roof. IR is different... that's a much longer wavelength and IR can penetrate a lot of stuff. IR is just heat ... no danger of skin cancer (unlike UV). Gold reflective coatings are extremely good at reflecting IR (it's why the mirrors on NASA's James Webb space telescope are gold).
 

louibluey

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... Gold reflective coatings are extremely good at reflecting IR (it's why the mirrors on NASA's James Webb space telescope are gold).
I've seen a gold tint in the front windshield, pretty sure it is the IRR aspect of the glass, definitely looks kind of cool, sort of an aerospace vibe to it.

Here is some more information on the small info boxes on each window - Decoding Your Car’s Windshield. "What about the line reading “LAMINATED AS1”? U.S. federal regulations require that glass pass certain safety tests. AS1 glass passes them all, AS2 does not pass all the impact tests, and AS3 is typically of a darker tint and is referred to as privacy glass. Since AS1 is the only glass to pass all safety tests, it is the only glass allowed for windshield use."
 

texaninmi

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First photo is windshield in lower left shows IRR. Second photo is of panoramic roof, No markings. I started this yesterday wondering why my pano roof is hotter then the windshield at the same sun angle. 10 degrees hotter.



Ford Mustang Mach-E Panoramic roof is not IRR. PXL_20210510_142754128


Ford Mustang Mach-E Panoramic roof is not IRR. PXL_20210510_142754128
Laminated Low E glass for panoramic roof. IRR for windshield.
 

Carsinmyblood

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I'm pretty sure we're not going to get a straigh answer until it's properly test, or until Ford is sued for a bad sunburn on a long trip.
 

Carsinmyblood

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So you're arguing that the front windows are safety glass, and the rear ones are the ones that shatter in to shards of death?
Safety glass and laminated glass are sometimes used interchangeably, but are completely different.

No, none of the glass in cars breaks into shards. Not for 60 or so years.
 

StrWhtMME

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Are you sure there is a legal requirement that it has to be stated on the label? Is anyone familiar with the DOT code? I would honestly be surprised if IRR is something they control.
The glass is different, windshield vs roof glass

Special Low-E (low-emissivity) coating helps keep the cabin cool in the summer and warm in the winter

o Absorbs and re-radiates heat from the sun back out (in the summer) or interior heat in (in the winter)

o Outperforms the sunshade on other Ford vehicles

o TTS (Total Solar Transmission) was 27 on the previous Mustang glass roof, which was praised for how cool it kept the interior… this one is 21.4!

• Also adds an Infra-Red Reflective (IRR) coating on the windshield to help with heat

o Provides additional interior heat reduction

o TTS of a standard windshield is 60, this one is 39!
 

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Here is a first look at a light measurement with a broad band cosine probe (internal sensor covered by a thick white diffuser). Still looking for the old specs. for this probe, but probably includes at least some UV, possibly some IR (TBD). For now, take these first measurements as predominately visible light.

If the sunlight about midday is taken as 100% intensity (probe always about vertical), the light on the dash through the windshield (broadband) is down by 36% from the light outside (i.e. 64% dash compared to 100% outside), and the light under the roof is down by 97%.

(probably matters less, but car was coated with a ceramic coating, including windows)

Later in the week, I hope to get some more rigorous UV numbers with a UV meter with a UV ab probe, but for now, also took all three measurements with a simple UV polycarbonate filter (Sunpack plastic flash filter). The differences were small, but outside I got more attenuation (6%) than inside, would not make too much of that yet, other than to confirm that the cosine probe possibly includes some UV. Also, will try some IR measurements at 850 nm.

On further thought, probably not much UV gets through the white diffuser of the cosine probe.

The dash measurement possibly includes some light from the front side windows. The roof measurement was made almost with glass contact.

Ford Mustang Mach-E Panoramic roof is not IRR. Screen Shot 2021-05-11 at 11.56.08 AM
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