I think they are originally from Germany but I saw them in Mexico. They used to be done with electricity but now there are some that use solar power. Usually done with a push of a button mounted on a wall.
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What Is The Name Of The Windows (for A House) That Change Color Or Tint Level With Electricity Or Solar Power?
– February 13, 2010Posted in: Alternative Energy
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No sure. But I know they use them in some “smart houses.” Smart houses are also called “green houses.” They are houses that use very little electricity and mostly rely on solar power. You should google it. Im sure you will find the answer.
Switchable glazings (sometimes called “smart windows”) can change properties such as shading coefficients (the amount of solar heat gain allowed) or visible transmittance (amount of visible light that passes through a window) in response to an electric current or to the changing environmental conditions themselves.
There are only a few manufacturers that offer these technologies now (Sage Electrochromics at http://www.sage-ec.com and SPD Technologies at http://www.infinitint.com)