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.

Publications

Publications By Research Area

1998

Sullivan, Robert, Liliana O. Beltran, Eleanor S. Lee, Michael D. Rubin, and Stephen E. Selkowitz."Energy and Daylight Performance of Angular Selective Glazings."ASHRAE/DOE/BTECC Conference, Thermal Performance of the Exterior Envelopes of Buildings VII (1998).

1997

Beltran, Liliana O., Eleanor S. Lee, and Stephen E. Selkowitz."Advanced Optical Daylighting Systems: Light Shelves and Light Pipes."1996 IESNA Annual Conference 26.2 (1997) 91-106. DOI

1996

Lee, Eleanor S., Liliana O. Beltran, and Stephen E. Selkowitz."Demonstration of a Light-Redirecting Skylight System at the Palm Springs Chamber of Commerce."1996 ACEEE Summer Study on Energy Efficiency in Buildings: Profiting from Energy Efficiency (1996).

1994

Lee, Eleanor S., Stephen E. Selkowitz, Francis M. Rubinstein, Joseph H. Klems, Liliana O. Beltran, and Dennis L. DiBartolomeo."A Comprehensive Approach to Integrated Envelope and Lighting Systems for New Commercial Buildings."ACEEE 1994 Summer Study on Energy Efficiency in Buildings (1994).

Beltran, Liliana O., Eleanor S. Lee, Konstantinos M. Papamichael, and Stephen E. Selkowitz."The Design and Evaluation of Three Advanced Daylighting Systems: Light Shelves, Light Pipes and Skylights."Solar 94, Golden Opportunities for Solar Prosperity (1994).

Papamichael, Konstantinos M., Liliana O. Beltran, Reto A. Furler, Eleanor S. Lee, Stephen E. Selkowitz, and Michael D. Rubin."Simulating the Energy Performance of Holographic Glazings."13th SPIE International Symposium on Optical Materials Technology for Energy Efficiency and Solar Energy Conversion (1994).

Lee, Eleanor S., Stephen E. Selkowitz, Francis M. Rubinstein, Joseph H. Klems, Liliana O. Beltran, Dennis L. DiBartolomeo, and Robert Sullivan."Developing Integrated Envelope and Lighting Systems for Commercial Buildings."Solar '94: Golden Opportunities for Solar Prosperity (1994).

1993

Selkowitz, Stephen E., Eleanor S. Lee, Francis M. Rubinstein, Joseph H. Klems, Konstantinos M. Papamichael, Liliana O. Beltran, Dennis L. DiBartolomeo, and Robert Sullivan."Realizing the DSM Potential of Integrated Envelope and Lighting Systems."2nd National New Construction Programs for Demand-Side Management Conference (1993).

Papamichael, Konstantinos M., Liliana O. Beltran, Reto A. Furler, Eleanor S. Lee, Stephen E. Selkowitz, and Michael D. Rubin."The Energy Performance of Prototype Holographic Glazings." (1993).

Papamichael, Konstantinos M., and Liliana O. Beltran."Simulating the Daylight Performance of Fenestration Systems and Spaces of Arbitrary Complexity: The IDC Method."3rd International Conference of the International Building Performance Simulation Association, Building Simulation 93 (1993).

1992

Selkowitz, Stephen E., Liliana O. Beltran, Werner K.E. Osterhaus, Konstantinos M. Papamichael, Jennifer E. Schuman, Robert Sullivan, and Michael Wilde."Building Performance Analysis Using Interactive Multimedia Concepts."1992 ACEEE Summer Study on Energy Efficiency in Buildings (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Daylighting Optical Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Dynamic Curtain Wall Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Glazing Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Lighting Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Shading Systems." (1992).