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That doesn't make any sense. I have a newish Toyota and I have been in temps at 115 in the SW, hotter when I left my car out in the sun...no plastic damage at all. The same thing was claimed here on a house that hit 258 degrees and melted the siding (http://www.thebostonchannel.com/r/24342726/detail.html - broken link)...even though you can see she is standing in front of it showing off the damage between the focused light and the siding ( a hint: 258 degrees will cause severe burns in seconds).
Low E glass has been around a long time even though most interest in it has been pretty tepid till recently. My own parents and neighbors have had the glass in high altitude Colorado (closer to the sun, more heat) since the mid 1990s and there have been no problems with heat damage.
I don't doubt they reflect light and it heats up, but I think the temps are a bit exaggerated. It's likely a combination with crappy materials. 2 cases out of tens of thousands who have these windows is not an epidemic or cause for alarm...it's a fact of life as you transition into new materials.
Maybe the reflected light hit another, concave surface before it finally hit the plastic
The difference is the type of gas they put between the windows,
Even a window with regular air will act as really good insulation, the gas they use is just better insulation. Technically anything can be considered insulation, they all slow down the transfer rate of heat. Some better than others.
A low E window is a double paned window. It has a greenish tint on the outside piece of glass that helps block the rays coming in. It is hardly noticeable unless you know what to look for. It uses an argon gas on the inside to slow down heat. If it is installed backwards (which happens quite often) it doesn't work well at all. I say this being a glazier for the past 10 years.
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