Berkeley National Laboratory Scientists Inventing Paint-on Retrofit for Energy Efficient Windows

by Erin Larsen

The US Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) researchers are in the process of developing a paint-on coating for windows to increase energy efficiency. It is estimated that 10 percent of aggregate energy consumption in buildings in the US is due to window performance. Warm and southern climates are particularly impacted because a significant fraction of energy usage goes to air conditioning. This inefficiency costs building owners about $50 billion annually. While window replacement or other commercially available retrofits would resolve this problem, the high cost of these options is prohibiting. Berkeley Lab’s polymer heat-reflective coating that can be painted on would be $1.50 per square foot, one-tenth the current market for commercially installed energy efficient retrofit window coatings. Continue reading