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 Researcher Named a 2013 Star of Building Science by Building4Change

September 26, 2013

Building4change, a website that addresses to sustainability, innovation and best practice in the built environment, has named 13 people as Stars of Building Science Virtual Academy of Excellence for the year 2013. One of them is Stephen Selkowitz of the Environmental Energy Technologies Division. Cited as an “internationally recognized expert in window technologies, façade systems and daylighting,” Selkowitz was also the Head of EETD’s former Building Technologies Department for many years. See the complete list of Stars of Building Science at the link below.