By Devin Powell -
An engineered window coating can be tweaked to respond to changing weather conditions. Small voltages applied to the material trigger it to block heat and, independently, light.
Selective control over the amount of heat and light passing through windows could help to keep buildings cool during the summer and warm during the winter. Around 4% of all energy consumed in the United States is used to cool or warm buildings to compensate for heat transfer through windows, according to the US Department of Energy.
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