About Us +
Researchers in the Building Technology & Urban Systems Division (BTUS) at Lawrence Berkeley National Laboratory develop data and technologies that increase energy efficiency and improve the health, safety and comfort of building occupants, in the United States and worldwide.

We work closely with industry partners, academics and government officials to achieve these goals, and share our research widely
Research +
We are at the forefront of cutting-edge research that redefines building technology and explores all areas of urban systems.

We have been leaders for decades in developing energy-efficient windows, improving indoor air quality, coming up with new ideas to fix the nation's electricity grid, and so much more.

Visit our research areas at the right to find out more.
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Publications +
Enjoy presentations from Building Technology & Urban systems research experts on a wide variety of topics in the areas of building energy efficiency, the electricity grid and how it relates to buildings and much more.
- Presentations
News
Tools & Guides +
Explore our tools, guidebooks and software and download for free.

We offer a variety of technologies designed to simulate and model real-world circumstances to assist in energy-saving programs and help building owners build better buildings. These tools can help calculate performance of building systems like windows and shades, help consumers and builders pick the best windows for a variety of applications and much more.

EETD’s Early Technological Successes—Energy-Efficient Windows

October 17, 2013

The 40th anniversary of the founding of the Environmental Energy Technologies Division at Berkeley Lab is November 1, 2013.

Every Thursday during October, we’ll look back at a significant energy-efficient technology developed by EETD and its research partners.

This Week

EETD has developed energy-efficient technologies that are all around you, saving energy in your home and workplace. One of those is the low-e, or low-emissivity, energy-efficient window.

To learn about EETD’s work on energy-efficient windows, go to the link below.