| 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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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.

1993

Ross, Jennifer T, Michael D Rubin, X Yao, Nathan Newman, and Amy Moll."Ion Implantation of Mg and C into GaN Films Grown by Ion-Assisted MBE." (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).

Yazdanian, Mehry, and Joseph H Klems."Measurement of the Exterior Convective Film Coefficient for Windows in Low-Rise Buildings."ASHRAE Transactions 100, Part 1 (1993).

Akbari, Hashem, Sarah E Bretz, James W Hanford, Dan M Kurn, Beth L Fishman, and Haider Taha."Monitoring peak power and cooling energy savings of shade trees and white surfaces in the Sacramento Municipal Utility District (SMUD) service area: data analysis, simulations, and results." (1993).

Rubin, Michael D, Nathan Newman, James S Chan, T.C Fu, and Jennifer T Ross."P-Type Gallium Nitride by Reactive Ion-Beam Molecular Beam Epitaxy with Ion Implantation, Diffusion or Coevaporation of Mg."Applied Physics Letters 64.1 (1993) 64-66. DOI

Sailor, David J."Role of Surface Characteristics in Urban Meteorology and Air Quality." (1993).

Frost, Karl J, Dariush K Arasteh, and Joseph H Eto."Savings from Energy Efficient Windows: Current and Future Savings from New Fenestration Technologies in the Residential Market." (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).

Inc, EIC Laboratories."Solid State Electrochromatic Smart Windows." (1993).

Finlayson, Elizabeth U, Dariush K Arasteh, Charlie Huizenga, Michael D Rubin, and M. M Susan Reilly."Window 4.0: Documentation of Calculation Procedures." (1993).

Sullivan, Robert, Karl J Frost, Dariush K Arasteh, and Stephen E Selkowitz."Window U-Value Effects on Residential Cooling Load." (1993).

Program, Building Technologies."WINDOW Update." (1993).

1992

Sullivan, Robert, Eleanor S Lee, and Stephen E Selkowitz."A Method of Optimizing Solar Control and Daylighting Performance in Commercial Office Buildings."Thermal Performance of the Exterior Envelopes of Buildings V Conference (1992).

Klems, Joseph H, and Jeffrey L Warner."A New Method for Predicting the Solar Heat Gain of Complex Fenestration Systems."Proceedings of the Thermal Performance of the Exterior Envelope of Buildings V Conference (1992).

Griffith, Brent T, and Dariush K Arasteh."Gas-Filled Panels: A Thermally Improved Building Insulation."Proceedings of the Thermal Performance of the Exterior Envelopes of Buildings V Conference (1992).

Beck, Fredric A, and Dariush K Arasteh."Improving the Thermal Performance of Vinyl-Framed Windows."Thermal Performance of the Exterior Envelopes of Building V Conference (1992).

Akbari, Hashem, Sarah E Bretz, James W Hanford, Arthur H Rosenfeld, David J Sailor, Haider Taha, and Willem Bos."Monitoring peak power and cooling energy savings of shade trees and white surfaces in the Sacramento Municipal Utility District (SMUD) service area: project design and preliminary results." (1992). DOI

Arasteh, Dariush K, R. R Christophe Mathis, and William DuPont."The NFRC Window U-Value Rating Procedures."ASHRAE/DOE/BTECC Conference on the Thermal Performance of the Exterior Envelopes of Buildings V (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).

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).

Brown, Richard E, Dariush K Arasteh, and Joseph H Eto."Improving the Thermal Performance of the U.S. Residential Window Stock."1992 ACEEE Summer Study on Energy Efficiency in Buildings (1992).