Energy-efficient windows change color like self-adjusting sunglasses

Energy efficient windows that work like sun-glasses for our buildings could be the next step to saving energy consumption in the future. These energy efficient windows are currently under the chisel and hammer and are being developed at the National Renewable Energy Laboratory (NREL). They will work like self-adjusting sunglasses and will help reduce energy consumption by around 1/8th of that currently being used by buildings. Currently, buildings use around 40% of the energy in U.S. and this reduction of consumption will prove to be a great boon.

This project is being developed since the 1980’s under the Electrochromic Initiative and Windows Technology program and will also draw inspiration from photovoltaic and thin film technology. After overcoming a few hurdles, this technology will be ready to use dropping the cost of windows and increasing performance.
[Cleantechnica]