| Building Technology and Urban Systems

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.
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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.

1994

Siminovitch, Michael J, Eric Pankonin, Chad Praul, and Chin Zhang."Improving the Performance of Integral Screw-Base Compact Fluorescent Lamps in a Base-Down Burning Position Using Thermal Bridge Systems."IESNA Annual Conference (1994).

Rushmeier, Holly, and Gregory J Ward."Energy Preserving Non-Linear Filters."SIGGRAPH 94 (1994).

Johnson, Francis X, James W Hanford, Richard E Brown, Alan H Sanstad, and Jonathan G Koomey."Residential HVAC Data, Assumptions and Methodology for End-Use Forecasting with EPRI-REEPS 2.1." (1994).

Hwang, Roland J, Francis X Johnson, Richard E Brown, James W Hanford, Alan H Sanstad, and Jonathan G Koomey."Residential Appliance Data, Assumptions and Methodology for End-Use Forecasting with EPRI-REEPS 2.1." (1994).

Sezgen, Osman, Yu Joe Huang, Joseph H Eto, Barbara A Atkinson, and Jonathan G Koomey."Technology data characterizing lighting in commercial buildings: Application to end-use forecasting with COMMEND 4.0." (1994).

Koomey, Jonathan G, Francis X Johnson, Jennifer E Schuman, Ellen M Franconi, Steve E Greenberg, James D Lutz, Brent T Griffith, Dariush K Arasteh, Celina S Atkinson, Kristin E Heinemeier, Yu Joe Huang, Lynn K Price, Gregory J Rosenquist, Francis M Rubinstein, Stephen E Selkowitz, Haider Taha, and Isaac Turiel."Buildings Sector Demand-Side Efficiency Technology Summaries." (1994).

Berman, Sam M, Mark A Bullimore, Robert J Jacobs, Ian L Bailey, and Neeraj J Gandhi."An Objective Measure of Discomfort Glare."Journal of the Illuminating Engineering Society 23 (1994) 40-49.

Siminovitch, Michael J."Centralized Lighting Systems for Office Interiors."Journal of the Russian Illuminating Engineering Society (Sveto Tekhnika) (1994).

Clear, Robert D, and Sam M Berman."Environmental and Health Aspects of Lighting: Mercury."Journal of the Illuminating Engineering Society 23 (1994) 138-156.

1993

Packer, Michael, and Francis M Rubinstein."Developing Practical Reflectors for Cylindrical and Compact Fluorescent Lamps Based on Nonimaging Optics."Annual IEEE-IAS Conference (1993).

Siminovitch, Michael J, Andrew Hamilton, Chin Zhang, and Rudolph R Verderber."Dirt Depreciation of Compact Fluorescent Lamp Downlights."Annual IEEE-IAS Conference (1993). DOI

Siminovitch, Michael J, Andrew Hamilton, Rudolph R Verderber, and Chin Zhang."Variations in Convective Venting to Increase the Efficiency of Compact Fluorescent Downlights."Annual IEEE-IAS Conference (1993).

Koomey, Jonathan G, Deborah E Schechter, and Deborah Gordon."Cost-Effectiveness of Fuel Economy Improvements in 1992 Honda Civic Hatchbacks." (1993) 33.

Siminovitch, Michael J, and Chin Zhang."Increasing Fixture Efficiency with Convective Venting in Compact Fluorescent Downlights."Annual Association of Energy Engineers Conference (1993).

Berman, Sam M, George Fein, Don L Jewett, and F Ashford."Landolt C Recognition in Elderly Subjects is Affected by Scotopic Intensity of Surround Illuminants."Journal of the Illuminating Engineering Society 23 (1993).

Berman, Sam M, George Fein, Don L Jewett, and F Ashford."Luminance Controlled Pupil Size Affects Landolt C Task Performance."Journal of the Illuminating Engineering Society 22 (1993).

1992

Richardson, Robert W, and Sam M Berman."Variational Theory of the Radiant Emittance of the Mercury Argon Discharge and the Effects of Isotopic Enrichment."Journal of Applied Physics 72.12 (1992) 5571-5578. DOI

Pert, Evan T, Josephine del Rosario, and Michael J Siminovitch."Increasing Light Output and Efficacy of Recessed Troffers with Spot Coolers."15th World Energy Engineering and 1992 World Energy Environmental Congress (1992).

Osterhaus, Werner K.E, and Ian L Bailey."Large Area Glare Sources and Their Effect on Discomfort and Visual Performance at Computer Workstations."1992 IEEE Industry Applications Society Annual Meeting (1992).

Sgro, Lee Ann."The Thermal Gradient."IEEE-IAS (1992).

Greenhouse, Daniel S, Ian L Bailey, Peter A Howarth, and Sam M Berman."Spatial adaptation to text on a video display terminal."Ophthalmic and Physiological Optics 12.3 (1992) 302-306.

Ward, Gregory J, and Paul S Heckbert."Irradiance Gradients."Eurographics Rendering Workshop (1992).

Clear, Robert D, and Sam M Berman."Economics and Lighting Level Recommendations."Journal of the Illuminating Engineering Society 22 (1992).

Bailey, Ian L, Robert D Clear, and Sam M Berman."Size as a Determinant of Reading Speed."Journal of the Illuminating Engineering Society 22 (1992).

Berman, Sam M."Tuning Light Spectrum to Improve Energy Efficiency."International Association of Energy-Efficient Lighting 2 (1992).